SFI SYSTEM, Diagnostic DTC:P1604

DTC Code	DTC Name
P1604	Startability Malfunction

DESCRIPTION

This DTC is stored when the engine does not start even though the STA signal is input or when the engine takes a long time to start, and when the engine speed is low or the engine stalls just after the engine starts.

Using the GTS, the conditions present when the DTC was stored can be confirmed by referring to the freeze frame data. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.

It is necessary to check if the vehicle ran out of fuel before performing troubleshooting, as this DTC is also stored when there is engine starting trouble due to running out of fuel.

DTC No.	DTC Detection Condition	Trouble Area
P1604	Either of the following condition is met (1 trip detection logic): The engine speed is below 600 rpm with the STA signal on for a certain amount of time. The engine stalls right after it was started.	Engine immobiliser system Engine assembly (excess friction, compression loss) Starter assembly Crankshaft position sensor Camshaft position sensor Engine coolant temperature sensor Fuel pump Fuel pump control system Fuel line (fuel filter, pipes and hoses) Fuel injector assembly Throttle body with motor assembly Fuel pressure regulator assembly Battery Flywheel sub-assembly Spark plug No.1 ignition coil circuit Intake system Camshaft timing oil control valve assembly Manifold absolute pressure sensor Heated oxygen sensor Valve timing Fuel Purge VSV EGR valve system Intake valve ECM

DTC No.

DTC Detection Condition

Trouble Area

P1604

Either of the following condition is met (1 trip detection logic):

The engine speed is below 600 rpm with the STA signal on for a certain amount of time.
The engine stalls right after it was started.

Engine immobiliser system
Engine assembly (excess friction, compression loss)
Starter assembly
Crankshaft position sensor
Camshaft position sensor
Engine coolant temperature sensor
Fuel pump
Fuel pump control system
Fuel line (fuel filter, pipes and hoses)
Fuel injector assembly
Throttle body with motor assembly
Fuel pressure regulator assembly
Battery
Flywheel sub-assembly
Spark plug
No.1 ignition coil circuit
Intake system
Camshaft timing oil control valve assembly
Manifold absolute pressure sensor
Heated oxygen sensor
Valve timing
Fuel
Purge VSV
EGR valve system
Intake valve
ECM

WIRING DIAGRAM

Refer to DTC P0130 for the heated oxygen sensor circuit Click here.

Refer to DTC P0261 for the fuel Injector circuit Click here.

Refer to DTC P0351 for the ignition coil circuit (except Euro-OBD) Click here.

Refer to DTC P0443 for the purge VSV circuit Click here.

Refer to Fuel Pump Control Circuit Click here.

Refer to Ignition Circuit (for Euro-OBD) Click here.

CAUTION / NOTICE / HINT

Tech Tips

In contrast to normal malfunction diagnosis for components, circuits and systems, DTC P1604 is used to determine the malfunctioning area from the problem symptoms and freeze frame data when the user mentions problems such as starting difficulty.

As the DTC can be stored as a result of certain user actions, even if the DTC is output, if the customer makes no mention of problems, clear the DTC without performing any troubleshooting and return the vehicle to the customer.
If any other DTCs are output, perform troubleshooting for those DTCs first.
Read freeze frame data using the GTS. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.
When confirming the freeze frame data, be sure to check all 5 sets of freeze frame data Click here.
When confirming the freeze frame data, if there are multiple items related to the cause of the malfunction, perform troubleshooting for all related items.
Try to start the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and compare it with the freeze frame data.
If the malfunction does not reoccur, carefully check the vehicle conditions from when the malfunction occurred using freeze frame data.
When performing inspections, jiggle the relevant wire harnesses and connectors in an attempt to reproduce malfunctions that do not always occur.
If the same inspection or replacement procedure appears 2 times when performing an inspection procedure, it is not necessary to repeat the procedure the second time.

Malfunction Recurrence and Inspection Areas
1. Freeze frame data exists, but the malfunction (starting difficulty) has not reoccurred and the malfunction conditions are unknown.
  1. The engine speed recorded in the freeze frame data is 0 rpm (the engine does not crank).
    
    Tech Tips
    
    One of the following problems may be present: battery depletion, excess engine friction, a starter malfunction or a crankshaft position sensor malfunction.
    
    If the battery voltage is less than 6 V during cranking, there is a high probability that engine friction is abnormal.
    
    If the battery voltage drops to 5 V or less when starting the engine, the battery may be malfunctioning.
    
    If the battery voltage fluctuates while cranking the engine, it can be concluded that cranking is being performed. When the engine speed is 0 rpm, the crankshaft position sensor and/or an ECM may be malfunctioning.
  2. All engine speeds recorded in the freeze frame data are between 60 and 250 rpm (the engine cranks but there is no combustion).
    
    Tech Tips
    
    If the engine speed is between 100 and 250 rpm (no initial combustion), there may be a wiring problem or a complete failure of an ignition or fuel system part.
    
    Due to an engine coolant temperature sensor malfunction, the fuel injection volume is extremely high or low and the engine may not be able to be started.
  3. The engine speed recorded in the freeze frame data is 250 rpm or higher (the initial combustion and starter turnoff timing is too late).
    
    Tech Tips
    
    If the engine speed is 250 rpm or higher (combustion occurs but the initial combustion and starter turnoff timing is too late), the fuel injection volume is often incorrect (too low or too high) and determining the cause of the malfunction is often difficult.
    
    Due to an engine coolant temperature sensor malfunction, the fuel injection volume is extremely high or low and engine starting trouble may occur.
    
    If Long FT #1 is incorrect, there may be a fuel supply problem due to the injectors or fuel pump being clogged, etc.
    
    If the engine cranking speed is high, compression loss may have occurred due to carbon interfering with the valve operation.
2. When the malfunction (starting difficulty) can be reproduced, or malfunction conditions are known, perform the following inspections ("Problem symptoms" and "Systems to inspect")
  1. Problem symptoms
    1. The engine does not crank.
      
      Tech Tips
      
      The starter is normal if a noise that indicates the starter pinion gear is extending is heard. The battery may be fully depleted or there may be excess engine friction.
    2. The engine cranking speed is abnormal.
      
      Tech Tips
      
      If the engine cranking speed is high, compression loss may have occurred because carbon interfered with valve operation, etc.
    3. There is no initial combustion.
      
      Tech Tips
      
      If there is no initial combustion, there is probably a wiring problem or an ignition or fuel system part malfunction.
    4. The engine stalls after starter turnoff.
      
      Tech Tips
      
      If the engine stalls after starter turnoff, the air fuel ratio may be incorrect or the VVT may have a problem returning.
    5. The initial combustion and starter turnoff occur late.
      
      Tech Tips
      
      If the initial combustion and starter turnoff occur late, the fuel injection volume is probably incorrect (too low or too high).
      
      Tech Tips
      
      Causes of fuel system malfunctions according to conditions present at the time of the malfunction.
      
      When 2 to 3 minutes have elapsed after stopping the engine: Fuel pressure loss due to the fuel pressure regulator assembly failing to maintain the fuel pressure.
      
      When 15 to 120 minutes have elapsed after stopping the engine: Problem with injector fuel seal.
      
      When a long time has elapsed after stopping the engine: Fuel pressure regulator assembly is stuck open.
  2. Systems to inspect.
    1. Intake system
    2. Ignition system
    3. Fuel system

INSPECTION FLOW

Freeze frame data exists, but the malfunction (starting difficulty) has not reoccurred and the malfunction conditions are unknown.

Freeze Frame Data Item	Result	Suspected Area	Procedure
Engine Speed	0 rpm (no engine cranking at all)	Battery fully depleted Engine assembly (excess friction) Starter assembly Crankshaft position sensor ECM	4 to 9
	100 to 250 rpm (engine cranks but no initial combustion*1)	Fuel pump control system Ignition system Engine coolant temperature sensor Fuel injection system	10 to 14
	250 rpm or higher (combustion occurs but initial combustion and starter turnoff*2 occur late)	Engine assembly (compression loss) Fuel injection system Fuel pump control system	15 to 23

Tech Tips

*1: First combustion after cranking begins.
*2: Condition when engine speed increases and starter can be turned off.

When the malfunction (starting difficulty) can be reproduced, or when malfunction conditions are known.

Problem symptoms

Problem Symptom	Suspected Area	Suspected Component	Procedure
The engine does not crank	Battery malfunction	Battery fully depleted	26 to 31
	Starting system	Starter assembly (includes pinion gear wear or tooth damage) Starting system
	Engine assembly	Engine assembly (excess friction) Flywheel sub-assembly wear or tooth damage
Cranking speed too low	Battery malfunction	Battery fully depleted	32 to 34
	Starting system	Starter assembly
	Engine assembly	Engine assembly (excess friction)
Cranking speed too high	Engine assembly	Engine assembly (compression loss)
There is no initial combustion	Fuel supply problem	Cannot maintain pressure due to fuel pressure regulator assembly malfunction Fuel injector assembly leak Fuel leak from fuel line Fuel pump control system Fuel pump	35 to 48
There is no initial combustion	Ignition system malfunction	Spark plug Crankshaft position sensor No.1 ignition coil	35 to 48
Engine stalls after starter turnoff	Air suction	Intake system connections	49 to 56
	Deposits in throttle body with motor assembly	Throttle body with motor assembly
	VVT valve does not return properly	Camshaft timing oil control valve assembly
	Manifold absolute pressure sensor malfunction	Manifold absolute pressure sensor
	EGR valve does not close properly	EGR valve assembly
The initial combustion and starter turnoff occur late	Engine coolant temperature sensor malfunction	Engine coolant temperature sensor	57 to 70
	Manifold absolute pressure sensor malfunction	Manifold absolute pressure sensor
	Abnormal air fuel ratio learning value	Heated oxygen sensor
	Deviation from fuel injection characteristics	Fuel injector assembly
	Wet-fouled or dry-fouled spark plug	Spark plug
	Lack of fuel pressure	Fuel pressure regulator assembly Fuel pump Fuel pump control system

Systems to inspect.

Troubleshooting by System	Suspected Area	Suspected Component	Procedure
Fuel system troubleshooting A	Abnormal air fuel ratio learning value	Fuel injector assembly	85 to 92 93 to 100
	Rough idling	Crankshaft position sensor
	Abnormal fuel pressure	Fuel Fuel leak from fuel line Fuel pump Fuel pressure regulator assembly
Fuel system troubleshooting B	Abnormal concentration of HC in surge tank	Purge VSV system Fuel injector assembly	101 to 103
Fuel system troubleshooting C	Injection signal system malfunction	Fuel injector assembly Crankshaft position sensor Camshaft position sensor ECM	72 to 75
Intake system troubleshooting	Difference between ISC target value and opening angle when idling	Engine assembly (compression loss) Valve timing Engine coolant temperature sensor ECM	82 to 84 104 to 106
Ignition system troubleshooting	Camshaft and/or crankshaft position sensor signal malfunction	Crankshaft position sensor system (including sensor installation) Camshaft position sensor system (including sensor installation) ECM	76 to 81 107 to 112

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

CHECK ANY OTHER DTCS OUTPUT AND RECORD FREEZE FRAME DATA (IN ADDITION TO DTC P1604)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.


*a	DTC is stored
*b	0.5 seconds
*c	Freeze frame data recorded point

Read the DTCs and record the Freeze Frame Data.

Tech Tips

This freeze frame data shows the actual engine conditions when engine starting trouble occurred.
When confirming the freeze frame data, be sure to check all 5 data sets of freeze frame data.
The fourth set of freeze frame data is the data recorded when the DTC is stored.

Result
Result	Proceed to
DTC P1604 is output	A
DTC P1604 and other DTCs are output	B

GO TO DTC CHART Click here

CHECK ENGINE IMMOBILISER SYSTEM

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Immobiliser Fuel Cut.

Read the value displayed on the GTS.

OK
Immobiliser Fuel Cut is OFF

Tech Tips

If the engine is started immediately after reconnecting the battery terminal, the engine may stall immediately after it starts due to the intercommunication process between each ECU. For this reason, when starting the engine after reconnecting the battery terminal, first turn the ignition switch to ON and then wait several seconds for the communication process to complete before starting the engine.
When this operation causes DTC P1604 to be stored, this is due to normal operation of the immobiliser system and does not indicate a malfunction, so clear the DTC and return the vehicle to the customer.

Result
Result	Proceed to
OK	A
NG (w/ Entry and Start System)	B
NG (w/o Entry and Start System)	C

CHECK ENGINE IMMOBILISER SYSTEM Click here

CHECK MALFUNCTION CONDITION

Confirm the problem symptoms.

Result
Result	Proceed to
Freeze frame data exists, but the starting difficulty cannot be reproduced and it is unknown what kind of starting difficulty occurred	A
The problem symptoms can be reproduced, or the malfunction conditions are known	B

CONFIRM PROBLEM SYMPTOM Click here

READ FREEZE FRAME DATA

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Click here.

Result
Freeze Frame Data Item		Suspected Area	Proceed to
Engine Speed	Battery Voltage	Suspected Area	Proceed to
All 5 sets of freeze frame data are 0 rpm (no engine cranking at all)	Minimum voltage is less than 5 V	Battery fully depleted	A
	Minimum voltage is 5 V or higher	Starter assembly malfunction Crankshaft position sensor system Excess engine friction ECM	B
100 to 250 rpm (engine cranks but no initial combustion)	-	Fuel pump control system Ignition system Engine coolant temperature sensor Fuel injection system	C
250 rpm or higher (combustion occurs but initial combustion and starter turnoff occur late)	-	Engine assembly Engine coolant temperature sensor Fuel injection system Fuel pump control system	D

CHARGE OR REPLACE BATTERY

READ FREEZE FRAME DATA Click here

READ VALUE USING GTS (MAP) Click here

READ FREEZE FRAME DATA

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Click here.

Result
Freeze Frame Data Item	Result	Suspected Area	Proceed to
Battery Voltage	Minimum voltage is 6 V or higher and voltage does not fluctuate*3	Starter system	A1 B2
	Minimum voltage is 6 V or higher and voltage fluctuates4, 5	Crankshaft position sensor system ECM	C
	Minimum voltage is 5 to 6 V*6	Excess engine friction Battery fully depleted	D

*1: w/ Entry and Start System
*2: w/o Entry and Start System

Tech Tips


*1	Freeze Frame Data
*2	Voltage does not Fluctuate
*3	Voltage Fluctuates

*3: The 5 sets of freeze frame data show approximately the same battery voltage.

*4: The 5 sets of freeze frame data show different battery voltages.
*5: If the voltage fluctuates, it can be determined that cranking is being performed. When the engine speed is 0 rpm, the crankshaft position sensor system and/or the ECM may be malfunctioning.
*6: There may be excess engine friction. Make sure that the crankshaft rotates smoothly when turning it by hand. Excess engine friction may have occurred temporarily. Remove the cylinder head cover and oil pan, and check for foreign matter such as iron fragments. If there is a malfunction or signs of a malfunction present, perform a detailed inspection by disassembling all the parts.

CHECK CRANKING HOLDING FUNCTION CIRCUIT Click here

CHECK STARTER SIGNAL CIRCUIT Click here

CHECK AND REPAIR ENGINE ASSEMBLY OR BATTERY

CHECK CRANKSHAFT POSITION SENSOR INSTALLATION
1. Check the tightening and installation condition of the crankshaft position sensor bolt.
2. Check the connection of the crankshaft position sensor connector.
  
  OK
  
  Crankshaft position sensor is installed correctly.
NG
SECURELY REINSTALL SENSOR Click here

OK
INSPECT CRANKSHAFT POSITION SENSOR
1. Disconnect the B24 crankshaft position sensor connector (w/ Stop and Start System).
2. Disconnect the B88 crankshaft position sensor connector (w/o Stop and Start System).
3. Check for oil on the connector terminals.
  
  OK
  
  No oil on the terminals.
NG
REPLACE CRANKSHAFT POSITION SENSOR Click here

OK
CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)
1. Check the harnesses and connectors, referring to DTC P0335 inspection procedure Click here.
  Tech Tips
  - Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
  - Make sure there is not an excessive amount of force applied to the wire harness.
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
CHECK CRANKSHAFT POSITION SENSOR
1. Replace the crankshaft position sensor Click here.
2. Check the engine start operation.
  
  OK
  
  Malfunction has been repaired successfully.
OK
END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

NG
REPLACE ECM Click here

OK
Crankshaft position sensor is installed correctly.

OK
No oil on the terminals.

OK
Malfunction has been repaired successfully.

READ FREEZE FRAME DATA

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Click here.

Result
Freeze Frame Data Item			Suspected Area	Proceed to
Coolant Temp, Ambient Temperature, Intake Air	Coolant Temp, Ambient Temperature	Fuel Pump/Speed Status	Suspected Area	Proceed to
Difference between Coolant Temp, Ambient Temperature and Intake Air is 10°C (18°F) or more*1	Coolant Temp is 125°C (257°F) or more, or lower than Ambient Temperature by 15°C (27°F) or more	-	Engine coolant temperature sensor	A
	Other than above	All 5 sets of freeze frame data are ON	-	B
	Other than above	At least 1 of the 5 sets of freeze frame data is OFF	Fuel pump control system	C
Difference between Coolant Temp, Ambient Temperature and Intake Air is less than 10°C (18°F)*2	-	At least 1 of the 5 sets of freeze frame data is OFF	Fuel pump control system	C
	-	All 5 sets of freeze frame data are ON	-	B

Tech Tips

*1: A long time had not elapsed after stopping the engine.
*2: A long time had elapsed after stopping the engine.

REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

CHECK FUEL PUMP CONTROL CIRCUIT Click here

PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED)

Text in Illustration
*a	Front view of wire harness connector (to Fuel Suction with Pump and Gauge Tube Assembly)

Connect the GTS to the DLC3.

Disconnect the fuel suction with pump and gauge tube assembly connector.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
K17-4 - Body ground	Active Test is being performed	11 to 14 V

Tech Tips

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.

CHECK FUEL PUMP CONTROL CIRCUIT Click here

CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR ASSEMBLY)
1. Check the harnesses and connectors, referring to Fuel Injector Circuit inspection procedure Click here.
  Tech Tips
  - Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
  - Make sure there is not an excessive amount of force applied to the wire harness.
NG
CHECK FUEL INJECTOR CIRCUIT Click here

OK

PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.

When performing the Active Test, check for fuel leakage from the fuel pipes.

Result
Result	Proceed to
Fuel leakage or signs of fuel leakage are present	A
No fuel leakage or signs of fuel leakage	B

Tech Tips

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump control system may be malfunctioning.
Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.

REPAIR OR REPLACE FUEL LINE

CHECK FUEL SYSTEM

Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter and inside the fuel tank), and for signs that the fuel pump was stuck.

Result
Result	Proceed to
There is foreign matter or signs that fuel pump was stuck	A
There is no foreign matter and no signs that fuel pump was stuck	B

Tech Tips

If there is foreign matter such as iron particles on the fuel pump, fuel filter or fuel tank, remove the foreign matter.

REPAIR OR REPLACE FUEL SYSTEM

PERFORM SIMULATION TEST Click here

READ FREEZE FRAME DATA

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Click here.

Result
Freeze Frame Data Item				Suspected Area	Proceed to
Coolant Temp, Ambient Temperature, Intake Air	Coolant Temp, Ambient Temperature	Long FT #1	Engine Speed	Suspected Area	Proceed to
Difference between Coolant Temp, Ambient Temperature and Intake Air is 10°C (18°F) or more*2	Coolant Temp is 125°C (257°F) or higher, or lower than outside temperature*2 by 15°C (27°F) or higher	-	-	Engine coolant temperature sensor	A
	Other than above	-15% or less, or 15% or higher	-	Fuel pump control system Fuel injector assembly	B
		-15 to 15%	Minimum speed is 300 rpm or higher*1	Engine assembly	C
		-15 to 15%	Minimum speed is below 300 rpm	Fuel system Intake air system	D
Difference between Coolant Temp, Ambient Temperature and Intake Air is less than 10°C (18°F)*3	-	-15% or less, or 15% or higher	-	Fuel pump control system Fuel injector assembly	B
		-15 to 15%	Minimum speed is 300 rpm or higher*1	Engine assembly	C
		-15 to 15%	Minimum speed is below 300 rpm	Fuel system Intake air system	D

Tech Tips

*1: Compression loss may have occurred in the engine assembly.
*2: A long time had not elapsed after stopping the engine.
*3: A long time had elapsed after stopping the engine.

REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

CHECK AND REPAIR ENGINE ASSEMBLY

READ FREEZE FRAME DATA Click here

INSPECT FUEL INJECTOR ASSEMBLY
1. Check that no carbon is stuck to the fuel injector assembly.
  
  OK
  
  No carbon present.
NG
REPLACE FUEL INJECTOR ASSEMBLY Click here

OK

CHECK FUEL SYSTEM

Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter and inside the fuel tank), and for signs that the fuel pump was stuck.

Result
Result	Proceed to
There is foreign matter or signs that fuel pump was stuck	A
There is no foreign matter and no signs that fuel pump was stuck	B

Tech Tips

If there is foreign matter such as iron particles on the fuel pump, fuel filter or fuel tank, remove the foreign matter.

REPAIR OR REPLACE FUEL SYSTEM

PERFORM SIMULATION TEST Click here

READ FREEZE FRAME DATA

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.

Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Click here.

Result
Freeze Frame Data Item	Result	Suspected Area	Proceed to
Coolant Temp	Engine coolant temperature is 40°C (104°F) or less*1	Fuel pressure regulator assembly	A
	Engine coolant temperature is 40 to 90°C (104 to 194°F)*2	Fuel injector assembly	B
	Engine coolant temperature is 90°C (194°F) or higher*3	Fuel pressure regulator assembly	A

Tech Tips

*1: If the engine coolant temperature is 40°C [104°F] or less (after stopping the engine and the vehicle is not driven for a long period of time), the fuel pressure regulator assembly may be stuck open. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

*2: If the engine coolant temperature is 40 to 90°C [104 to 194°F] (15 to 120 minutes have passed after stopping the engine), there may be fuel leaking from a fuel injector assembly.

*3: If the engine coolant temperature is 90°C [194°F] or higher (2 to 5 minutes have passed after stopping the engine), there may be a problem with the fuel pressure regulator assembly failing to maintain the fuel pressure. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

INSPECT FUEL INJECTOR ASSEMBLY Click here

CHECK FUEL PRESSURE

Tech Tips

For the fuel pressure inspection, refer to the following procedures Click here.

Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.

Standard
147 kPa (1.5 kgf/cm², 21 psi) or higher (5 minutes after stopping the engine)

Tech Tips

If the engine cannot be started, read the values after cranking the engine.

Result
Result	Proceed to
NG	A
OK	B

REPLACE FUEL PRESSURE REGULATOR ASSEMBLY Click here

PERFORM SIMULATION TEST Click here

INSPECT FUEL INJECTOR ASSEMBLY

Clean the inside of the surge tank with compressed air.

After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes.

Result
Result	Proceed to
4000 ppm or higher	A
Less than 4000 ppm	B

Tech Tips

If the concentration is 4000 ppm or higher, a fuel injector assembly may have a sealing problem.

INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY Click here

INSPECT FUEL INJECTOR ASSEMBLY
1. Inspect the fuel injector assemblies Click here.
NG
REPLACE FUEL INJECTOR ASSEMBLY Click here

OK

INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY

Check if carbon is in the air flow passage.

Result
Result	Proceed to
No carbon present	A
Carbon in passage	B

CLEAN OR REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY Click here

CHECK INTAKE SYSTEM
1. Check the intake system for vacuum leak Click here.
  
  OK
  
  No leak in intake system.
NG
REPAIR OR REPLACE INTAKE SYSTEM

OK

PERFORM SIMULATION TEST

Check if the engine can be started.

Result
Result	Proceed to
Engine cannot be started	A
Engine can be started	B

END

CONFIRM PROBLEM SYMPTOM

Confirm the problem symptoms.

Tech Tips

The problem symptoms below can be determined by reading the freeze frame data.

Result
Problem Symptom	Suspected Area	Proceed to
The engine does not crank	Battery fully depleted Starter assembly (includes pinion gear wear or tooth damage) Starter system Engine assembly (excess friction) Flywheel sub-assembly wear or tooth damage	A
Abnormal cranking speed	Battery fully depleted Starter assembly Engine assembly (excess friction, compression loss)	B
There is no initial combustion (combustion does not occur even once)*1	Fuel pressure regulator assembly fuel pressure maintenance Fuel injector assembly leak Fuel leak from fuel line Fuel pump control system Fuel pump Spark plug Crankshaft position sensor system No.1 ignition coil system EGR valve assembly	C
The engine stalls after starter turnoff (engine stalls immediately after the first time the engine speed increases)*2	Intake system connections Throttle body with motor assembly Camshaft timing oil control valve assembly Manifold absolute pressure sensor system EGR valve assembly	D
The initial combustion and starter turnoff occur late*3	Engine coolant temperature sensor Manifold absolute pressure sensor Heated oxygen sensor No.2 heated oxygen sensor Fuel injector assembly Spark plug Fuel pressure regulator assembly Fuel pump Fuel pump control system	E

Tech Tips

If there is hesitation (cranking speed is slow and combustion occurs before passing TDC) during the initial cranking period, the battery charge may be insufficient or the starter may be malfunctioning.
*1: If there is no initial combustion, a wire harness may be malfunctioning, or the ignition or fuel system may be malfunctioning.
*2: If the engine stalls after starter turnoff, the air fuel ratio may be incorrect or the camshaft timing oil control valve assembly may have a problem returning.
*3: If the initial combustion and starter turnoff occur late, the fuel injection volume may be incorrect (too low or too high).

PERFORM SIMULATION TEST Click here

INSPECT FUEL INJECTOR ASSEMBLY Click here

READ VALUE USING GTS (MAP) Click here

INSPECT ENGINE COOLANT TEMPERATURE SENSOR Click here

PERFORM SIMULATION TEST

When cranking the engine, check for a noise indicating that the starter pinion gear is extending, and check that the starter pinion gear is not spinning freely.

Result
Problem Symptom	Suspected Area	Proceed to
A noise indicating that the starter pinion gear is extending is heard and the starter pinion gear is not spinning freely.*2	Battery Excess engine friction Starter assembly	A
A noise indicating that the starter pinion gear is extending is heard but the starter pinion gear is spinning freely.	Flywheel sub-assembly Starter assembly	B
A noise indicating that the starter pinion gear is extending is not heard	Battery Starter assembly Starter system Stop and start system*1	C

*1: w/ Stop and Start System

Tech Tips

*2: The battery may be fully depleted or there may be excess engine friction.

INSPECT STARTER ASSEMBLY (STARTER PINION GEAR) Click here

INSPECT BATTERY Click here

INSPECT BATTERY
1. Inspect the battery Click here.
NG
CHARGE OR REPLACE BATTERY

OK

CHECK ENGINE ASSEMBLY

Check that the crankshaft rotates smoothly when rotating it by hand.

OK
Crankshaft rotates smoothly.

Tech Tips

Excess engine friction may have occurred temporarily. Remove the cylinder head cover and oil pan, and check for foreign matter such as iron fragments. If there is a malfunction or signs of a malfunction present, perform a detailed inspection by disassembling all the parts.

Result
Result	Proceed to
OK (w/ Stop and Start System)	A
OK (for Cold Area Specification Vehicles)	B
OK (except Cold Area Specification Vehicles)	C
NG	D

INSPECT STARTER ASSEMBLY Click here

REPAIR OR REPLACE ENGINE ASSEMBLY

INSPECT STARTER ASSEMBLY (STARTER PINION GEAR)

Remove the starter assembly.
- w/ Stop and Start System: Click here
- for Cold Area Specification Vehicles: Click here
- except Cold Area Specification Vehicles: Click here

Check for starter pinion gear wear and damage.

OK
There is no wear or damage.

Result
Result	Proceed to
OK	A
NG (w/ Stop and Start System)	B
NG (for Cold Area Specification Vehicles)	C
NG (except Cold Area Specification Vehicles)	D

REPLACE FLYWHEEL SUB-ASSEMBLY Click here

REPLACE STARTER ASSEMBLY Click here

INSPECT BATTERY
1. Inspect the battery Click here.
NG
CHARGE OR REPLACE BATTERY

OK

INSPECT STARTER ASSEMBLY

Inspect the starter assembly.

w/ Stop and Start System: Click here
for Cold Area Specification Vehicles: Click here
except Cold Area Specification Vehicles: Click here

Result
Result	Proceed to
OK (w/ Entry and Start System)	A
OK (w/o Entry and Start System)	B
NG (w/ Stop and Start System)	C
NG (for Cold Area Specification Vehicles)	D
NG (except Cold Area Specification Vehicles)	E

CHECK CRANKING HOLDING FUNCTION CIRCUIT Click here

CHECK STARTER SIGNAL CIRCUIT Click here

REPLACE STARTER ASSEMBLY Click here

PERFORM SIMULATION TEST

Check the cranking speed.

Result
Problem Symptom	Suspected Area	Proceed to
Cranking speed is slow (100 rpm or less)	Battery Starter assembly Excess engine friction	A
Cranking speed is fast (300 rpm or higher)*1	Engine compression loss	B

Tech Tips

*1: If the cranking speed is fast, there may be compression loss.

CHECK AND REPAIR ENGINE ASSEMBLY

INSPECT BATTERY
1. Inspect the battery Click here.
NG
CHARGE OR REPLACE BATTERY

OK

CHECK ENGINE ASSEMBLY

Check that the crankshaft rotates smoothly when rotating it by hand.

OK
Crankshaft rotates smoothly.

Tech Tips

Result
Result	Proceed to
OK (w/ Stop and Start System)	A
OK (for Cold Area Specification Vehicles)	B
OK (except Cold Area Specification Vehicles)	C
NG	D

INSPECT STARTER ASSEMBLY Click here

CHECK AND REPAIR ENGINE ASSEMBLY

INSPECT FUEL INJECTOR ASSEMBLY
1. Using a sound scope or screwdriver, check for an injector operating sound while cranking the engine.
  
  OK
  
  Fuel injector assembly operating sound is heard.
NG
READ VALUE USING GTS (ENGINE SPEED) Click here

OK
CHECK FUEL PRESSURE
1. Check the fuel pressure Click here.
NG
PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED) Click here

OK
CHECK SPARK PLUG AND SPARK
1. Check for sparks Click here.
NG
INSPECT SPARK PLUG Click here

OK

CONFIRM VEHICLE CONDITION

Confirm the conditions present when the malfunction occurred based on the customer problem analysis.

Result
Problem Symptom	Suspected Area	Proceed to
When the engine is stopped and a long time has passed, engine starting trouble occurs*1	Fuel pressure regulator assembly is stuck open	A
When the engine is stopped and approximately 15 to 120 minutes have passed, engine starting trouble occurs*2	Fuel injector assembly leak	B
When the engine is stopped and approximately 2 to 3 minutes have passed, engine starting trouble occurs*3	Failure to maintain fuel pressure by fuel pressure regulator assembly	A
Condition other than above, or there is an inconsistency in the conditions present when engine starting trouble occurs	-	C*4

Tech Tips

*1: The fuel pressure regulator assembly may be stuck open. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

*2: Fuel may be leaking from a fuel injector assembly.

*3: The fuel pressure regulator assembly may not be able to maintain the fuel pressure. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.

*4: From step 71, perform fuel system troubleshooting C (steps 72 to 75).

INSPECT FUEL INJECTOR ASSEMBLY Click here

CHECK MALFUNCTION CONDITION Click here

CHECK FUEL PRESSURE

Tech Tips

For the fuel pressure inspection, refer to the following procedures Click here.

Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.

Standard
147 kPa (1.5 kgf/cm², 21 psi) or higher (5 minutes after stopping the engine)

Result
Result	Proceed to
NG	A
OK	B*1

Tech Tips

If the engine cannot be started, read the values after cranking the engine.
*1: from step 71, perform fuel system troubleshooting C (steps 72 to 75).

REPLACE FUEL PRESSURE REGULATOR ASSEMBLY Click here

CHECK MALFUNCTION CONDITION Click here

INSPECT FUEL INJECTOR ASSEMBLY

Clean the inside of the surge tank with compressed air.

After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes.

Result
Result	Proceed to
4000 ppm or higher	A
Less than 4000 ppm	B*1

Tech Tips

If the concentration is 4000 ppm or higher, a fuel injector assembly may have a sealing problem.
*1: From step 71, perform fuel system troubleshooting C (steps 72 to 75).

REPLACE FUEL INJECTOR ASSEMBLY Click here

CHECK MALFUNCTION CONDITION Click here

INSPECT SPARK PLUG
1. Inspect the spark plugs Click here.
  
  Tech Tips
  
  Even if the spark plug of only one cylinder is malfunctioning, replace the spark plugs of all cylinders.
NG
REPLACE SPARK PLUG Click here

OK
READ VALUE USING GTS (ENGINE SPEED)
1. Connect the GTS to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the GTS on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / Engine Speed.
5. Start the engine.
6. While running the engine, read the value of Engine Speed.
  
  OK
  
  A value that matches the actual engine speed is constantly output.
  Tech Tips
  - Check the engine speed using a line graph.
  - If the engine cannot be started, check the engine speed while cranking the engine.
  - If the engine speed is 0 rpm, the crank position sensor may have an open or short circuit.
NG
CHECK CRANKSHAFT POSITION SENSOR CIRCUIT Click here

OK

CHECK TERMINAL VOLTAGE (POWER SOURCE OF NO.1 IGNITION COIL)

Check the harnesses and connectors.

Refer to DTC P0351 inspection procedure except Euro-OBD Click here.

Refer to Ignition Circuit inspection procedure for Euro-OBD Click here.

Result
Result	Proceed to
OK	A
NG (except Euro-OBD)	B
NG (for Euro-OBD)	C

Tech Tips

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.

CHECK IGNITION COIL POWER SOURCE CIRCUIT Click here

CHECK HARNESS AND CONNECTOR (NO.1 IGNITION COIL - ECM)
1. Check the harnesses and connectors.
  - Refer to DTC P0351 inspection procedure except Euro-OBD Click here.
  - Refer to Ignition Circuit inspection procedure for Euro-OBD Click here.
  Tech Tips
  - Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
  - Make sure there is not an excessive amount of force applied to the wire harness.
  - If the wire harness is normal, after replacing the No.1 ignition coil, check if engine starting trouble occurs again. If engine starting trouble occurs again, proceed to step 71 and perform troubleshooting for the ignition system (steps 76 to 81).
OK
REPLACE NO.1 IGNITION COIL Click here

NG
REPAIR OR REPLACE HARNESS OR CONNECTOR

PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.

When performing the Active Test, check for an operating sound from the fuel pump.

Standard

GTS Operation	Specified Condition
ON	Operating sound heard
OFF	Operating sound not heard

Tech Tips

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

CHECK FUEL PUMP CONTROL CIRCUIT Click here

PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.

When performing the Active Test, check for fuel leakage from the fuel pipes.

Result
Result	Proceed to
Fuel leakage or signs of fuel leakage are present	A
No fuel leakage or signs of fuel leakage	B

Tech Tips

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.
If there are no fuel leaks, after inspecting the fuel pump control system, check if engine starting trouble occurs again. If engine starting trouble occurs again, proceed to step 71 and perform fuel system troubleshooting C (steps 72 to 75).

REPAIR OR REPLACE FUEL LINE

CHECK FUEL PUMP CONTROL CIRCUIT Click here

READ VALUE USING GTS (ENGINE SPEED)
1. Connect the GTS to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the GTS on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / Engine Speed.
5. Start the engine.
6. While running the engine, read the value of Engine Speed.
  
  OK
  
  A value that matches the actual engine speed is constantly output.
  Tech Tips
  - Check the engine speed using a line graph.
  - If the engine cannot be started, check the engine speed while cranking the engine.
  - If the engine speed is 0 rpm, the crankshaft position sensor may have an open or short circuit.
NG
REPLACE CRANKSHAFT POSITION SENSOR Click here

OK
CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR ASSEMBLY)
1. Check the harnesses and connectors, referring to Fuel Injector Circuit inspection procedure Click here.
  Tech Tips
  - Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
  - Make sure there is not an excessive amount of force applied to the wire harness.
OK
REPLACE ECM Click here

NG
CHECK FUEL INJECTOR CIRCUIT Click here

READ VALUE USING GTS (MAP)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / MAP.

Read the MAP value.

Standard
Same as actual atmospheric pressure.

Tech Tips

Reference MAP value:

Engine Condition	Specified Condition
Ignition switch ON, engine stopped	80 to 110 kPa (600 to 825 mmHg)*

*: varies with weather condition.

CHECK HARNESS AND CONNECTOR (MANIFOLD ABSOLUTE PRESSURESENSOR - ECM) Click here

CHECK INTAKE SYSTEM
1. Check for air leaks in the intake system (vacuum hose disconnection, cracks, damaged gaskets, etc.) Click here.
  
  Tech Tips
  
  If the accelerator pedal is released after racing the engine, the inspection is easier to perform because the vacuum inside the intake manifold increases and the air suction noise becomes louder.
  
  OK
  
  There is no air leaks.
NG
REPAIR OR REPLACE INTAKE SYSTEM

OK

INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY

Disconnect the B23 throttle body with motor assembly connector.

Tech Tips

When the connector is disconnected, the vehicle enters fail-safe mode and the throttle valve opening angle is 7.5°.

Crank the engine and check that it starts.

Result
Result	Proceed to
Engine starts	A
Engine does not start	B

Tech Tips

When this inspection is performed, the MIL may illuminate. After finishing the inspection, check and clear the DTCs Click here.

PERFORM ACTIVE TEST USING GTS (CONTROL THE VVT SYSTEM (BANK1)) Click here

INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY
1. Check if carbon is in the air flow passage.
  
  OK
  
  No carbon present.
NG
REMOVE FOREIGN OBJECT AND CLEAN THROTTLE BODY WITH MOTOR ASSEMBLY

OK
PERFORM ACTIVE TEST USING GTS (CONTROL THE VVT SYSTEM (BANK1))
1. Performing the Active Test, referring to DTC P0011 inspection procedure Click here.
  Tech Tips
  - Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
  - When the results of the inspection using the Active Test are normal but the valve operating noise is abnormal, check the valve for any signs of problems.
NG
REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Click here

OK

PERFORM ACTIVE TEST USING GTS (CONTROL THE EGR STEP POSITION)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or more.

Tech Tips

The A/C switch and all accessory switches should be off.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position.

Check the engine idling condition in the Data List while performing the Active Test.

Tech Tips

Do not leave the EGR valve open for 10 seconds or more during the Active Test.
Be sure to return the EGR valve to step 0 when the Active Test is completed.
Do not open the EGR valve 20 steps or more during the Active Test.

OK
Idling condition changes in response to EGR step position.

Standard

-	EGR Step Position (Active Test)
-	0 Step	0 to 20 Steps
Idling condition	Steady idling	Idling changes from steady to rough idling or engine stalls

Result
Result	Proceed to
NG	A
OK	B*1

Tech Tips

*1: From step 71, perform intake system troubleshooting (steps 82 to 84). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 85 to 92).
During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in the EGR valve.

CHECK MALFUNCTION CONDITION Click here

INSPECT EGR VALVE ASSEMBLY

Remove the EGR valve assembly Click here.

Check if the EGR valve is stuck open.

OK
EGR valve is tightly closed.

Result
Result	Proceed to
NG	A
OK	B*1

Tech Tips

*1: From step 71, perform intake system troubleshooting (steps 82 to 84). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 85 to 92).

REPLACE EGR VALVE ASSEMBLY Click here

CHECK MALFUNCTION CONDITION Click here

CHECK HARNESS AND CONNECTOR (MANIFOLD ABSOLUTE PRESSURESENSOR - ECM)
1. Check the harnesses and connectors, referring to DTC P0107 inspection procedure Click here.
  Tech Tips
  - Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
  - Make sure there is not an excessive amount of force applied to the wire harness.
  - If the wire harness is normal, after replacing the manifold absolute pressure sensor, check if engine starting trouble occurs again. If engine starting trouble occurs again, proceed to step 71 and perform intake system troubleshooting (steps 82 to 84). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 85 to 92).
OK
REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR Click here

NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
INSPECT ENGINE COOLANT TEMPERATURE SENSOR
1. Inspect the engine coolant temperature sensor Click here.
  
  Tech Tips
  
  If the engine coolant temperature sensor is malfunctioning, after replacing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 71 and perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.
NG
REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

OK
CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)
1. Check the harnesses and connectors, referring to DTC P0117 inspection procedure Click here.
  Tech Tips
  - Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
  - Make sure there is not an excessive amount of force applied to the wire harness.
  - If the wire harness or connector is malfunctioning, after replacing or repairing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 71 and perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

READ VALUE USING GTS

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / MAP.

Read the MAP value.

Standard
Same as actual atmospheric pressure.

Tech Tips

Reference MAP value:

Engine Condition	Specified Condition
Ignition switch ON, engine stopped	80 to 110 kPa (600 to 825 mmHg)*

*: varies with weather condition.

REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR Click here

CHECK HARNESS AND CONNECTOR (MANIFOLD ABSOLUTE PRESSURESENSOR - ECM)
1. Check the harnesses and connectors, referring to DTC P0107 inspection procedure Click here.
  Tech Tips
  - Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
  - Make sure there is not an excessive amount of force applied to the wire harness.
  - If the wire harness or connector is malfunctioning, after replacing or repairing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 71 and perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

READ VALUE USING GTS

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.

Enter the following menus: Powertrain / Engine and ECT / Data List / Long FT #1 and Atmosphere Pressure.

Result
Data List Item	Result	Suspected Area	Proceed to
Long FT #1	25% or higher, or less than -25%	Heated oxygen sensor No.2 heated oxygen sensor Manifold absolute pressure sensor Fuel injector assembly ECM	A
Both Data List items listed above	Values are other than above	-	B

CHECK FUEL PRESSURE Click here

PERFORM SIMULATION TEST

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.
Turn the ignition switch off and wait for at least 30 seconds.

Check if the engine can be started.

Result
Result	Proceed to
Engine can be started	A
Engine cannot be started	B

CHECK FUEL PRESSURE Click here

INSPECT HEATED OXYGEN SENSOR

Connect the GTS to the DLC3.
Start the engine.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Fuel System Status #1.
Confirm that Fuel System Status #1 is CL.
Enter the following menus: Powertrain / Engine and ECT / Data List / AF Lambda B1S1.

Read the output voltage from the heated oxygen sensor when increasing and decreasing the fuel injection volume.

Standard

GTS Display	Control the Injection Volume for A/F Sensor	Specified Condition
O2S B1S1	12.5%	Heated oxygen sensor output voltage is higher than 0.55 V
O2S B1S1	-12.5%	Heated oxygen sensor output voltage is below 0.4 V

Tech Tips

The heated oxygen sensor has an output delay of a few seconds and the No.2 heated oxygen sensor has a maximum output delay of approximately 20 seconds.
If the heated oxygen sensor is malfunctioning, after replacing it, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 71 and perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.

REPLACE HEATED OXYGEN SENSOR Click here

PERFORM SIMULATION TEST
1. Check if the idle speed is stable after starting the engine.
  
  OK
  
  Engine speed is stable.
  
  Tech Tips
  
  After replacing the fuel injector assembly or manifold absolute pressure sensor, check if engine starting trouble occurs again. If engine starting trouble occurs, replace the ECM. If engine starting trouble still occurs, proceed to step 71 and perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.
OK
REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR Click here

NG
REPLACE FUEL INJECTOR ASSEMBLY Click here
CHECK FUEL PRESSURE
1. Inspect the fuel pressure Click here.
NG
PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED) Click here

OK

INSPECT SPARK PLUG

Inspect the spark plugs Click here.

Result
Result	Proceed to
All cylinders are normal	A
One cylinder is abnormal*1	B
All cylinders are abnormal2, 3	C

Tech Tips

*1: If one cylinder is abnormal, replace the spark plug of that cylinder and inspect the ignition and fuel system for that cylinder. After performing repairs, check if engine starting trouble occurs again. If engine starting trouble still occurs, proceed to step 71 and perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.
*2: If all cylinders are abnormal, replace the spark plugs of all cylinders and check if engine starting trouble occurs again. If engine starting trouble still occurs, proceed to step 71 and perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.
*3: Engine starting trouble may occur if the vehicle is driven extremely short distances repeatedly.

REPLACE SPARK PLUG (ABNORMAL CYLINDER) Click here

REPLACE SPARK PLUG (ALL CYLINDER) Click here

CONFIRM VEHICLE CONDITION

Confirm the conditions present when the malfunction occurred based on the customer problem analysis.

Result
Problem Symptom	Suspected Area	Proceed to
When the engine is stopped and a long time has passed, engine starting trouble occurs*1	Fuel pressure regulator assembly is stuck open	A
When the engine is stopped and approximately 15 to 120 minutes have passed, engine starting trouble occurs*2	Fuel injector assembly leak	B
When the engine is stopped and approximately 2 to 3 minutes have passed, engine starting trouble occurs*3	Failure to maintain fuel pressure by fuel pressure regulator assembly	A
Condition other than above, or there is an inconsistency in the conditions present when engine starting trouble occurs	-	C*4

Tech Tips

*1: The fuel pressure regulator assembly may be stuck open. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.
*2: Fuel may be leaking from a fuel injector assembly.
*3: The fuel pressure regulator assembly may not be able to maintain the fuel pressure. Attach a fuel pressure gauge and check the ability to maintain fuel pressure after stopping the engine.
*4: From step 71, perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.

INSPECT FUEL INJECTOR ASSEMBLY Click here

CHECK MALFUNCTION CONDITION Click here

CHECK FUEL PRESSURE

Tech Tips

For the fuel pressure inspection, refer to the following procedures Click here.

Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.

Standard
147 kPa (1.5 kgf/cm², 21 psi) or higher (5 minutes after stopping the engine)

Result
Result	Proceed to
NG	A
OK	B*1

Tech Tips

If the engine cannot be started, read the values after cranking the engine.
*1: From step 71, perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.

REPLACE FUEL PRESSURE REGULATOR ASSEMBLY Click here

CHECK MALFUNCTION CONDITION Click here

INSPECT FUEL INJECTOR ASSEMBLY

Clean the inside of the surge tank with compressed air.

After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes.

Result
Result	Proceed to
4000 ppm or higher	A
Less than 4000 ppm	B*1

Tech Tips

If the concentration is 4000 ppm or higher, a fuel injector assembly may have a sealing problem.
*1: From step 71, perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.

REPLACE FUEL INJECTOR ASSEMBLY Click here

CHECK MALFUNCTION CONDITION Click here

PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.

When performing the Active Test, check for fuel leakage from the fuel pipes.

Result
Result	Proceed to
Fuel leakage or signs of fuel leakage are present	A
No fuel leakage or signs of fuel leakage	B

Tech Tips

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.
If there are no fuel leaks, after inspecting the fuel pump control system, check if engine starting trouble occurs again. If engine starting trouble still occurs, proceed to step 71 and perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.

REPAIR OR REPLACE FUEL LINE

CHECK FUEL PUMP CONTROL CIRCUIT Click here

CHECK MALFUNCTION CONDITION

If the malfunction could not be identified during the inspection in steps 38, 39, 40 and 46 perform fuel system troubleshooting C (steps 72 to 75).

Result
Performed Step	Troubleshooting by System	Procedure	Proceed to
Steps 38, 39, 40 and 46	Fuel system troubleshooting C	72 to 75	A

If the malfunction could not be identified during the inspection in step 44, perform ignition system troubleshooting (steps 76 to 81).

Result
Performed Step	Troubleshooting by System	Procedure	Proceed to
Step 44	Ignition system troubleshooting	76 to 81	B

If the malfunction could not be identified during the inspection in steps 53, 54, 55 and 56, perform intake air system troubleshooting (steps 82 to 84). If engine starting trouble still occurs, perform fuel system troubleshooting A (steps 85 to 92).

Result
Performed Step	Troubleshooting by System	Procedure	Proceed to
Steps 53, 54, 55 and 56	Intake air system troubleshooting	82 to 84	C
Steps 53, 54, 55 and 56	Fuel system troubleshooting A	85 to 92	C

If the malfunction could not be identified during the inspection in steps 57, 58, 59, 60, 63, 64, 66, 67, 68, 69 and 70, perform fuel system troubleshooting A (steps 93 to 100), fuel system troubleshooting B (steps 101 to 103), intake air system troubleshooting (steps 104 to 106), and ignition system troubleshooting (steps 107 to 112), in that order.

Result
Performed Step	Troubleshooting by System	Procedure	Proceed to
Steps 57, 58, 59, 60, 63, 64, 66, 67, 68, 69 and 70	Fuel system troubleshooting A	93 to 100	D
	Fuel system troubleshooting B	101 to 103
	Intake air system troubleshooting	104 to 106
	Ignition system troubleshooting	107 to 112

CHECK CRANKSHAFT POSITION SENSOR INSTALLATION Click here

READ VALUE USING GTS (ISC LEARNING VALUE) Click here

CHECK FUEL PRESSURE Click here

INSPECT FUEL INJECTOR ASSEMBLY
1. Inspect the fuel injector assemblies Click here.
NG
REPLACE FUEL INJECTOR ASSEMBLY Click here

OK
CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR ASSEMBLY)
1. Check the harnesses and connectors, referring to Fuel Injector Circuit inspection procedure Click here.
  Tech Tips
  - Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
  - Make sure there is not an excessive amount of force applied to the wire harness.
NG
CHECK FUEL INJECTOR CIRCUIT Click here

OK
CHECK CRANKSHAFT POSITION SENSOR
1. Replace the crankshaft position sensor Click here.
2. Check the engine start operation.
  
  OK
  
  Malfunction has been repaired successfully.
OK
END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

NG
CHECK CAMSHAFT POSITION SENSOR
1. Replace the camshaft position sensor Click here.
2. Check the engine start operation.
  
  OK
  
  Malfunction has been repaired successfully.
OK
END (CAMSHAFT POSITION SENSOR IS DEFECTIVE)

NG
REPLACE ECM Click here
CHECK CRANKSHAFT POSITION SENSOR INSTALLATION
1. Check the tightening and installation condition of the crankshaft position sensor bolt.
2. Check the connection of the crankshaft position sensor connector.
  
  OK
  
  Crankshaft position sensor is installed correctly.
NG
SECURELY REINSTALL SENSOR Click here

OK
CHECK CAMSHAFT POSITION SENSOR INSTALLATION
1. Check the tightening and installation condition of the camshaft position sensor bolt.
2. Check the connection of the camshaft position sensor connector.
  
  OK
  
  Camshaft position sensor is installed correctly.
NG
SECURELY REINSTALL SENSOR Click here

OK
CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)
1. Check the harnesses and connectors, referring to DTC P0335 inspection procedure Click here.
  Tech Tips
  - Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
  - Make sure there is not an excessive amount of force applied to the wire harness.
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)
1. Check the harnesses and connectors, referring to DTC P0341 inspection procedure Click here.
  Tech Tips
  - Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
  - Make sure there is not an excessive amount of force applied to the wire harness.
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
CHECK CRANKSHAFT POSITION SENSOR
1. Replace the crankshaft position sensor Click here.
2. Check the engine start operation.
  
  OK
  
  Malfunction has been repaired successfully.
OK
END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

NG
CHECK CAMSHAFT POSITION SENSOR
1. Replace the camshaft position sensor Click here.
2. Check the engine start operation.
  
  OK
  
  Malfunction has been repaired successfully.
OK
END (CAMSHAFT POSITION SENSOR IS DEFECTIVE)

NG
REPLACE ECM Click here

READ VALUE USING GTS (ISC LEARNING VALUE)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / ISC Learning Value.

Start the engine and warm it up until the engine coolant temperature stabilizes with the A/C switch and all the accessory switches off.

Result
Data List Item	Result	Suspected Area	Proceed to
ISC Learning Value	(Engine displacement (liters) x 0.9) or higher	Valve timing Compression	A
ISC Learning Value	Less than (engine displacement (liters) x 0.9)	-	B

INSPECT ENGINE COOLANT TEMPERATURE SENSOR Click here

CHECK CYLINDER COMPRESSION PRESSURE
1. Check the compression Click here.
OK
CHECK VALVE TIMING Click here

NG
CHECK AND REPAIR ENGINE ASSEMBLY
INSPECT ENGINE COOLANT TEMPERATURE SENSOR
1. Inspect the engine coolant temperature sensor Click here.
NG
REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

OK

CHECK FUEL PRESSURE

Tech Tips

For the fuel pressure inspection, refer to the following procedures Click here.

Attach a fuel pressure gauge and check the fuel pressure when cranking the engine and after stopping the engine.

Standard

Vehicle State	Specified Condition
Cranking engine	304 kPa (3.1 kgf/cm², 44 psi) to 343 kPa (3.5 kgf/cm², 50 psi)
5 minutes after stopping engine	147 kPa (1.5 kgf/cm², 21 psi) or higher

PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED) Click here

READ VALUE USING GTS (LONG FT #1)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.

Enter the following menus: Powertrain / Engine and ECT / Data List / Long FT #1.

Result
Data List Item	Result	Suspected Area	Proceed to
Long FT #1	-15 to 15%	Wire harness or connector Fuel	A
Long FT #1	15% or higher, or less than -15%	Fuel injector assembly	B

REPLACE FUEL INJECTOR ASSEMBLY Click here

PERFORM SIMULATION TEST

Check if the idle speed after starting the engine is currently stable and has always been stable in the past.

Result
Problem Symptom	Suspected Area	Proceed to
Current unstable idle speed or history of unstable idle speed	Crankshaft position sensor system	A
All current and past idle speeds are stable	Fuel	B

Tech Tips

Through the customer problem analysis, confirm the fuel being used and the location at which the fuel was added to check if the malfunction is caused by the fuel in the vehicle.

REPLACE FUEL

CHECK CRANKSHAFT POSITION SENSOR INSTALLATION
1. Check the tightening and installation condition of the crankshaft position sensor bolt.
2. Check the connection of the crankshaft position sensor connector.
  
  OK
  
  Crankshaft position sensor is installed correctly.
NG
SECURELY REINSTALL SENSOR Click here

OK
CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)
1. Check the harnesses and connectors, referring to DTC P0335 inspection procedure Click here.
  Tech Tips
  - Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
  - Make sure there is not an excessive amount of force applied to the wire harness.
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
CHECK CRANKSHAFT POSITION SENSOR
1. Replace the crankshaft position sensor Click here.
2. Check the engine start operation.
  
  OK
  
  Malfunction has been repaired successfully.
OK
END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

NG
REPLACE ECM Click here

PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.

When performing the Active Test, check for fuel leakage from the fuel pipes.

Result
Result	Proceed to
Fuel leakage or signs of fuel leakage are present	A
No fuel leakage or signs of fuel leakage	B

Tech Tips

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump control system may be malfunctioning.
Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.

REPAIR OR REPLACE FUEL LINE

INSPECT FUEL PUMP
1. Inspect the fuel pump Click here.
  Tech Tips
  - Make sure there is no foreign matter such as iron particles on the fuel pump and no signs that the fuel pump was stuck.
  - Make sure the internal connector is securely connected.
  - Make sure the fuel pump filter is not clogged.
OK
REPLACE FUEL PRESSURE REGULATOR ASSEMBLY Click here

NG
REPLACE FUEL PUMP Click here
CHECK FUEL PRESSURE

Tech Tips

For the fuel pressure inspection, refer to the following procedures Click here.
1. Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.
  
  Standard
  
  147 kPa (1.5 kgf/cm², 21 psi) or higher (5 minutes after stopping the engine)
  
  Tech Tips
  
  If the engine cannot be started, read the values after cranking the engine.
NG
PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED) Click here

OK

READ VALUE USING GTS (LONG FT #1)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.

Enter the following menus: Powertrain / Engine and ECT / Data List / Long FT #1.

Result
Data List Item	Result	Suspected Area	Proceed to
Long FT #1	-15 to 15%	Wire harness or connector Fuel	A
Long FT #1	15% or higher, or less than -15%	Fuel injector assembly	B

REPLACE FUEL INJECTOR ASSEMBLY Click here

PERFORM SIMULATION TEST

Check if the idle speed after starting the engine is currently stable and has always been stable in the past.

Result
Problem Symptom	Suspected Area	Proceed to
Current unstable idle speed or history of unstable idle speed	Crankshaft position sensor system	A
All current and past idle speeds are stable	Fuel	B

Tech Tips

Through the customer problem analysis, confirm the fuel being used and the location at which the fuel was added to check if the malfunction is caused by the fuel in the vehicle.

REPLACE FUEL

CHECK CRANKSHAFT POSITION SENSOR INSTALLATION
1. Check the tightening and installation condition of the crankshaft position sensor bolt.
2. Check the connection of the crankshaft position sensor connector.
  
  OK
  
  Crankshaft position sensor is installed correctly.
NG
SECURELY REINSTALL SENSOR Click here

OK
CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)
1. Check the harnesses and connectors, referring to DTC P0335 inspection procedure Click here.
  Tech Tips
  - Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
  - Make sure there is not an excessive amount of force applied to the wire harness.
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
CHECK CRANKSHAFT POSITION SENSOR
1. Replace the crankshaft position sensor Click here.
2. Check the engine start operation.
  
  OK
  
  Malfunction has been repaired successfully.
OK
REPLACE ECM Click here

NG
REPAIR OR REPLACE HARNESS OR CONNECTOR

PERFORM ACTIVE TEST USING GTS (CONTROL THE FUEL PUMP / SPEED)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.

When performing the Active Test, check for fuel leakage from the fuel pipes.

Result
Result	Proceed to
Fuel leakage or signs of fuel leakage are present	A
No fuel leakage or signs of fuel leakage	B

Tech Tips

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump control system may be malfunctioning.
Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.

REPAIR OR REPLACE FUEL LINE

INSPECT FUEL PUMP
1. Inspect the fuel pump Click here.
  Tech Tips
  - Make sure there is no foreign matter such as iron particles on the fuel pump and no signs that the fuel pump was stuck.
  - Make sure the internal connector is securely connected.
  - Make sure the fuel pump filter is not clogged.
NG
REPLACE FUEL PUMP Click here

OK

CHECK PURGE VSV

Text in Illustration
*1	Fuel Vapor Feed Hose (to Canister)
*2	Connector (to purge VSV)
*3	Purge VSV

Disconnect the fuel vapor feed hose (on the canister side) of the purge VSV.

Start the engine.
Idle the engine.
Disconnect the B61 connector of the purge VSV.
Check if air flows through the purge VSV.

OK

Air does not flow

Tech Tips

When this inspection is performed, the MIL may illuminate. After finishing the inspection, check and clear the DTCs Click here.

INSPECT PURGE VSV Click here

INSPECT FUEL INJECTOR ASSEMBLY

Clean the inside of the surge tank with compressed air.

After stopping the engine, measure the HC concentration inside the surge tank for 15 minutes.

Result
Result	Proceed to
4000 ppm or higher	A
Less than 4000 ppm	B

Tech Tips

If the concentration is 4000 ppm or higher, a fuel injector assembly may have a sealing problem.

REPLACE FUEL INJECTOR ASSEMBLY Click here

CHECK INTAKE VALVE

Check if carbon is on the intake valves.

Result
Result	Proceed to
Carbon present	A
No carbon present	B

CLEAN INTAKE VALVE

READ VALUE USING GTS (ISC LEARNING VALUE)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / ISC Learning Value.

Start the engine and warm it up until the engine coolant temperature stabilizes with the A/C switch and all the accessory switches off.

Result
Data List Item	Result	Suspected Area	Proceed to
ISC Learning Value	(Engine displacement (liters) x 0.9) or more	Valve timing Compression	A
ISC Learning Value	Less than (engine displacement (liters) x 0.9)	-	B

INSPECT ENGINE COOLANT TEMPERATURE SENSOR Click here

CHECK CYLINDER COMPRESSION PRESSURE
1. Check the compression Click here.
OK
CHECK VALVE TIMING Click here

NG
CHECK AND REPAIR ENGINE ASSEMBLY
INSPECT ENGINE COOLANT TEMPERATURE SENSOR
1. Inspect the engine coolant temperature sensor Click here.
NG
REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

OK
CHECK CRANKSHAFT POSITION SENSOR INSTALLATION
1. Check the tightening and installation condition of the crankshaft position sensor bolt.
2. Check the connection of the crankshaft position sensor connector.
  
  OK
  
  Crankshaft position sensor is installed correctly.
NG
SECURELY REINSTALL SENSOR Click here

OK
CHECK CAMSHAFT POSITION SENSOR INSTALLATION
1. Check the tightening and installation condition of the camshaft position sensor bolt.
2. Check the connection of the camshaft position sensor connector.
  
  OK
  
  Camshaft position sensor is installed correctly.
NG
SECURELY REINSTALL SENSOR Click here

OK
CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)
1. Check the harnesses and connectors, referring to DTC P0335 inspection procedure Click here.
  Tech Tips
  - Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
  - Make sure there is not an excessive amount of force applied to the wire harness.
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)
1. Check the harnesses and connectors, referring to DTC P0341 inspection procedure Click here.
  Tech Tips
  - Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
  - Make sure there is not an excessive amount of force applied to the wire harness.
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
CHECK CRANKSHAFT POSITION SENSOR
1. Replace the crankshaft position sensor Click here.
2. Check the engine start operation.
  
  OK
  
  Malfunction has been repaired successfully.
OK
END (CRANKSHAFT POSITION SENSOR IS DEFECTIVE)

NG
CHECK CAMSHAFT POSITION SENSOR
1. Replace the camshaft position sensor Click here.
2. Check the engine start operation.
  
  OK
  
  Malfunction has been repaired successfully.
OK
END (CAMSHAFT POSITION SENSOR IS DEFECTIVE)

NG
REPLACE ECM Click here