ECD SYSTEM(w/ Glow Plug Controller), Diagnostic DTC:P0087, P0088, P0191, P0A0F, P1229, P1272

DTC Code	DTC Name
P0087	Fuel Rail / System Pressure - Too Low
P0088	Fuel Rail / System Pressure - Too High
P0191	Fuel Rail Pressure Sensor Circuit Range / Performance
P0A0F	Engine Failed to Start
P1229	Fuel Pump System
P1272	Fuel Pressure Regulator Circuit

DESCRIPTION

With a cold engine, the internal pressure of the common rail is regulated by the pressure control valve of the common rail assembly. With a warm engine, it is regulated by the suction control valve of the fuel supply pump. When the engine is running with light load, it is regulated by both the pressure control valve and the suction control valve. Based on signals from the ECM, the pressure control valve opens when sudden deceleration occurs to prevent the fuel pressure from becoming too high.

DTCs to indicate a fuel pressure malfunction (P0087, P0088, P0191, P0A0F, P1229 and P1272)
These DTCs are used to indicate in which mode a malfunction was detected. They do not indicate which part was malfunctioning when the fuel pressure malfunction was detected.

Tech Tips

All of the following DTCs can be detected when the engine speed is 630 rpm or higher.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P0087	Fuel Rail / System Pressure - Too Low	Common rail internal pressure is less than 12000 to 15000 kPa (varies with engine speed) for 0.3 seconds. (1 trip detection logic)	Suction control valve (supply pump assembly) Open or short in pressure control valve (common rail assembly) circuit Pressure control valve (common rail assembly) Fuel filter element clogged Fuel leak Injector assembly Lack of fuel Fuel line (air bleeding) ECM	Comes on	DTC stored
P0088	Fuel Rail / System Pressure - Too High	Common rail internal pressure is 175000 kPa or higher for 0.3 to 1.0 seconds. (1 trip detection logic)	Suction control valve (supply pump assembly) Open or short in suction control valve (supply pump assembly) circuit Open or short in pressure control valve (common rail assembly) circuit Pressure control valve (common rail assembly) Fuel filter element clogged Fuel leak Injector assembly Lack of fuel Fuel line (air bleeding) ECM	Comes on	DTC stored
P0191	Fuel Rail Pressure Sensor Circuit Range / Performance	After certain period of time has elapsed after the engine has stopped (pressure control valve releases common rail internal pressure during this period), common rail internal pressure deviates from normal range. (Determination of a malfunction is conducted within a given time after the ignition switch is turned from ON to off. If a malfunction is detected within this time, the MIL is illuminated and a DTC is stored when the ignition switch is next turned to ON.) (1 trip detection logic)	Common rail assembly ECM Wire harness	Comes on	DTC stored
P0A0F	Engine Failed to Start	The engine speed is greater equal than the minimum threshold, but the pressure built up in the rail is not sufficient. (them, engine cannot start) Detect during engine cranking (2 trip detection logic)	Fuel line Supply pump assembly Common rail assembly Injector assembly ECM	-	DTC stored
P1229	Fuel Pump System	Both of following conditions 1 and 2 are met (1 trip detection logic). Common rail internal pressure is regulated using suction control valve (supply pump) while all of following conditions are met.*1 - Fuel temperature is above 15°C (59°F). - A certain period of time (maximum 300 seconds) has elapsed after the engine has been started. - Medium or heavy load condition. Actual fuel pressure remains lower than target rail pressure (The actual fuel pressure remains 17000 to 20000 kPa or lower for 1 second. Although the pressure control valve has sufficiently closed afterward, the actual fuel pressure still remains low for 1 second.)	Suction control valve (supply pump assembly) Open or short in suction control valve (supply pump assembly) circuit Open or short in pressure control valve (common rail assembly) circuit Pressure control valve (common rail assembly) Fuel filter element clogged Fuel leak Injector assembly Lack of fuel Fuel line (air bleeding) ECM	Comes on / -	DTC stored
P1272	Fuel Pressure Regulator Circuit	Both of the following conditions 1 and 2 are met (1 trip detection logic). Either of following conditions (a) or (b) is met (a) Common rail internal pressure is regulated using pressure control valve when either of the following condition is met*2 - Fuel temperature is below 15°C (59°F) - Within a certain period of time after the engine has been started (maximum 300 seconds, regardless of fuel temperature) (b) Common rail internal pressure is regulated using both suction control valve (supply pump) and pressure control valve while engine running under light load (including idling) and fuel temperature above 15°C (59°F) One of the following conditions (a) or (b) is met: (a) Although the pressure control valve has sufficiently opened, actual fuel pressure remains higher than target fuel pressure by 25000 kPa or higher for 1 second. (b) Actual fuel pressure remains lower than target rail pressure (The actual fuel pressure remains 17000 to 20000 kPa or lower than target fuel pressure for 1 second. Although the pressure control valve has sufficiently closed, afterward the actual fuel pressure still remains low for 1 second.)	Suction control valve (supply pump assembly) Open or short in suction control valve (supply pump assembly) circuit Open or short in pressure control valve (common rail assembly) circuit Pressure control valve (common rail assembly) Fuel filter element clogged Fuel leak Injector assembly Lack of fuel Fuel line (air bleeding) ECM	Comes on / -	DTC stored

Tech Tips

*1: At this time, the suction control valve is sending minimum volume of fuel depending on engine speed, load and fuel pressure, so it can reduce the rise in fuel temperature and reduce engine load.

Fuel pressure control response with suction control valve is not as fast as with the pressure control valve.

*2: At this time, suction control valve sending maximum volume of fuel at that engine speed.

Pressure control valve can reduce common rail pressure quickly during sudden deceleration.

DTC No.	DTC Detection Drive Pattern
P0087	Drive the vehicle when the fuel temperature is 15°C (59°F) or higher. Tech Tips Detection of this DTC is suspended during idling or when the accelerator pedal fully is released. Refer to the Freeze Frame Data, in particular Vehicle Speed, Engine Speed, MAF, MAP, Calculate Load, Coolant Temp.
Control mode: Fuel pressure malfunction when in PCV (Pressure Control Valve) control or SCV (Suction Control Valve) control.
Purpose of Monitoring: Detect in a high pressure line, injection nozzle stuck in open position, worn high pressure pump, worn injector assembly, leaking pressure control valve. Possible malfunctions on the low pressure side: Pressure before gear pump too low, gear pump output too low (filter clogged up, leak on low pressure side), supply pump output too low.

DTC No.

DTC Detection Drive Pattern

P0087

Drive the vehicle when the fuel temperature is 15°C (59°F) or higher.

Tech Tips

Detection of this DTC is suspended during idling or when the accelerator pedal fully is released.
Refer to the Freeze Frame Data, in particular Vehicle Speed, Engine Speed, MAF, MAP, Calculate Load, Coolant Temp.

Control mode:

Fuel pressure malfunction when in PCV (Pressure Control Valve) control or SCV (Suction Control Valve) control.

Purpose of Monitoring:

Detect in a high pressure line, injection nozzle stuck in open position, worn high pressure pump, worn injector assembly, leaking pressure control valve.

Possible malfunctions on the low pressure side: Pressure before gear pump too low, gear pump output too low (filter clogged up, leak on low pressure side), supply pump output too low.

DTC No.	DTC Detection Drive Pattern
P0088	Drive the vehicle when the fuel temperature is 15°C (59°F) or higher. Tech Tips Detection of this DTC is suspended during idling or when the accelerator pedal fully is released. Refer to the Freeze Frame Data, in particular Vehicle Speed, Engine Speed, MAF, MAP, Calculate Load, Coolant Temp.
Control mode: Fuel pressure malfunction when in PCV (Pressure Control Valve) control or SCV (Suction Control Valve) control.
Purpose of Monitoring: Possible malfunctions on the high pressure side: Pressure control valve stuck closed, pressure control valve supplied with power due to electrical error, suction control valve stuck in open position, orifice clogged up, suction control valve without power due to electrical error. Possible malfunctions on the low pressure side: Pressure before gear pump too high (e.g. supply pump with suction control valve), pressure after orifice too high.

DTC No.

DTC Detection Drive Pattern

P0088

Drive the vehicle when the fuel temperature is 15°C (59°F) or higher.

Tech Tips

Detection of this DTC is suspended during idling or when the accelerator pedal fully is released.
Refer to the Freeze Frame Data, in particular Vehicle Speed, Engine Speed, MAF, MAP, Calculate Load, Coolant Temp.

Control mode:

Fuel pressure malfunction when in PCV (Pressure Control Valve) control or SCV (Suction Control Valve) control.

Purpose of Monitoring:

Possible malfunctions on the high pressure side: Pressure control valve stuck closed, pressure control valve supplied with power due to electrical error, suction control valve stuck in open position, orifice clogged up, suction control valve without power due to electrical error.

Possible malfunctions on the low pressure side: Pressure before gear pump too high (e.g. supply pump with suction control valve), pressure after orifice too high.

DTC No.	DTC Detection Drive Pattern
P0191	Start the engine, then turn the ignition switch off and wait for 30 seconds or more when fuel temperature is 40°C (104°F) or higher, and then turn the ignition switch to ON. Tech Tips Refer to the Freeze Frame Data, in particular Vehicle Speed, Engine Speed, MAF, MAP, Calculate Load, Coolant Temp.
Purpose of Monitoring: Detect characteristic malfunction of the fuel pressure sensor, or pressure dropping manner malfunction in the common rail due to pressure control valve failure.

DTC No.

DTC Detection Drive Pattern

P0191

Start the engine, then turn the ignition switch off and wait for 30 seconds or more when fuel temperature is 40°C (104°F) or higher, and then turn the ignition switch to ON.

Tech Tips

Refer to the Freeze Frame Data, in particular Vehicle Speed, Engine Speed, MAF, MAP, Calculate Load, Coolant Temp.

Purpose of Monitoring:

Detect characteristic malfunction of the fuel pressure sensor, or pressure dropping manner malfunction in the common rail due to pressure control valve failure.

DTC No.	DTC Detection Drive Pattern
P0A0F	Engine cranking when the intake air temperature is 0°C (32°F) or more, and atmospheric pressure is 85 kPa or more.

DTC No.	DTC Detection Drive Pattern
P1229	Drive the vehicle when the fuel temperature is 15°C (59°F) or higher. Tech Tips Detection of this DTC is suspended during idling or when the accelerator pedal fully is released. Refer to the Freeze Frame Data, in particular Vehicle Speed, Engine Speed, MAF, MAP, Calculate Load, Coolant Temp.
Control mode: Fuel pressure malfunction when SCV (Suction Control Valve) control.
Purpose of Monitoring (DTC detection condition 2): Possible malfunction on the high pressure side: Leakage in a high pressure line, injection nozzle stuck in open position, worn high pressure pump, worn injector assembly, leaking pressure limiting valve. Possible malfunction on the low pressure side: Pressure before gear pump too low, gear pump output too low (filter clogged up, leak on low pressure side), supply pump output too low.

DTC No.

DTC Detection Drive Pattern

P1229

Drive the vehicle when the fuel temperature is 15°C (59°F) or higher.

Tech Tips

Detection of this DTC is suspended during idling or when the accelerator pedal fully is released.
Refer to the Freeze Frame Data, in particular Vehicle Speed, Engine Speed, MAF, MAP, Calculate Load, Coolant Temp.

Control mode:

Fuel pressure malfunction when SCV (Suction Control Valve) control.

Purpose of Monitoring (DTC detection condition 2):

Possible malfunction on the high pressure side: Leakage in a high pressure line, injection nozzle stuck in open position, worn high pressure pump, worn injector assembly, leaking pressure limiting valve.

Possible malfunction on the low pressure side: Pressure before gear pump too low, gear pump output too low (filter clogged up, leak on low pressure side), supply pump output too low.

DTC No.	DTC Detection Drive Pattern
P1272	One of following conditions (1), (2), (3) or (4) is met: When the fuel temperature is 15°C (59°F) or higher and accelerator pedal fully released. Engine idling. All driving conditions when fuel temperature is 10°C (50°F) or less. Within a certain period of time (maximum 300 seconds) after engine start. Tech Tips Refer to the Freeze Frame Data, in particular Vehicle Speed, Engine Speed, MAF, MAP, Calculate Load, Coolant Temp.
Control mode: Fuel pressure malfunction when in PCV (Pressure Control Valve) control, or when switching to PCV and SCV cooperative control.
Purpose of Monitoring (DTC detection condition 2-(a)): Possible malfunction on the high pressure side: Leakage in a high pressure line, injection nozzle stuck in open position, worn high pressure pump, worn injector assembly, leaking pressure limiting or pressure control valve. Possible malfunction on the low pressure side: Pressure before gear pump too low, gear pump output too low (filter clogged up, leak on low pressure side), supply pump output too low.
Purpose of Monitoring (DTC detection condition 2-(b)): Pressure control valve stuck, pressure control valve supplied with power due to electrical error. Possible error in the low pressure stage. Pressure control valve reflux too high.

DTC No.

DTC Detection Drive Pattern

P1272

One of following conditions (1), (2), (3) or (4) is met:

When the fuel temperature is 15°C (59°F) or higher and accelerator pedal fully released.
Engine idling.
All driving conditions when fuel temperature is 10°C (50°F) or less.
Within a certain period of time (maximum 300 seconds) after engine start.

Tech Tips

Refer to the Freeze Frame Data, in particular Vehicle Speed, Engine Speed, MAF, MAP, Calculate Load, Coolant Temp.

Control mode:

Fuel pressure malfunction when in PCV (Pressure Control Valve) control, or when switching to PCV and SCV cooperative control.

Purpose of Monitoring (DTC detection condition 2-(a)):

Possible malfunction on the low pressure side: Pressure before gear pump too low, gear pump output too low (filter clogged up, leak on low pressure side), supply pump output too low.

Purpose of Monitoring (DTC detection condition 2-(b)):

Pressure control valve stuck, pressure control valve supplied with power due to electrical error.

Possible error in the low pressure stage. Pressure control valve reflux too high.

Related Data List
DTC No.	Data List
P0087 P0088 P0191 P0A0F P1229 P1272	Target Common Rail Pressure Common Rail Pressure Target Pump SCV Current Fuel Temperature Engine Speed MAF MAP Vehicle Speed Coolant Temp

Tech Tips

When the engine is running, the actual common rail internal pressure (Common Rail Pressure) follows the target common rail internal pressure (Target Common Rail Pressure). Under a stable condition such as idling, Common Rail Pressure is within +/-10000 kPa of Target Common Rail Pressure.

Tech Tips

If DTC P0087, P0088, P0191, P0A0F, P1229 or P1272 is stored, the following symptoms may appear.

- Lack of power or engine stall due to fail-safe operation
If the Common Rail Pressure is 175000 kPa or higher.

- Combustion noise worsens
If the Common Rail Pressure is 15000 kPa or less.

- Difficult to start
If the Common Rail Pressure is higher than "Target Common Rail Pressure +20000 kPa".

- Combustion noise worsens
If the Common Rail Pressure is less than "Target Common Rail Pressure -20000 kPa".

- Difficult to start

- Poor acceleration

- Engine stall

WIRING DIAGRAM

Refer to DTC P0001.

Click here

Refer to DTC P0090.

Click here

CAUTION / NOTICE / HINT

Note

When replacing the ECM and/or injector assembly, perform ECM Initialization and Registration.

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

Tech Tips

When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing a new ECM, perform all of the initialization and registration procedures for the "Learning Values Write" function by following the instructions shown on the GTS display.
Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
If the value of "Target Pump SCV Current" in the freeze frame data exceeds 1530 mA, the supply pump assembly may have a malfunction.
Before starting the inspection procedure, check the following items of freeze frame data carefully for identifying the cause of the malfunction, and in judging whether it was temporary or not.

Target Common Rail Pressure
Common Rail Pressure
Target Pump SCV Current
Fuel Temperature
Engine Speed
MAF
MAP
Vehicle Speed
Coolant Temp

PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0087, P0088, P0191, P0A0F, P1229 OR P1272)

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

Record the stored DTCs and Freeze Frame Data.

Powertrain > Engine and ECT > Trouble Codes

Result

Result	Proceed to
DTC P0087, P0088, P0191, P1229 or P1272 is output	A
P0A0F is output	B
DTC P0087, P0088, P0191, P0A0F, P1229 or P1272 and other DTCs are output	C

Tech Tips

If any DTCs other than P0087, P0088, P0191, P0A0F, P1229 or P1272 are output, troubleshoot those DTCs first.

GO TO STEP 8 Click here

GO TO DTC CHART Click here

CHECK FUEL RECEIVER GAUGE (AMOUNT OF FUEL)

Check if the fuel level is low.

Result

Proceed to
OK
NG

GO TO STEP 6 Click here

ADD FUEL

Result

Proceed to
NEXT

BLEED AIR FROM FUEL SYSTEM

Bleed the air from the fuel system.

Click here

Result

Proceed to
NEXT

CHECK WHETHER DTC OUTPUT RECURS (DTC P0087, P0088, P0191, P1229 OR P1272)

Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs
Turn the ignition switch off and wait for 30 seconds.
If DTC P1272 was stored in the result of Step 1, perform the (A) to (C) confirmation driving pattern process. If the result of Step 1 is other than DTC P1272, perform the (D) to (F) confirmation driving pattern process.
Start the engine when the fuel temperature is 15°C (59°F) or less. (A)
Drive the vehicle in 2nd gear. (B)

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Fully depress the accelerator pedal, and then fully release it at an engine speed of 3000 rpm or more. (C)
Allow the engine to idle until the engine coolant temperature reaches 75°C (167°F) or higher. (D)
Drive the vehicle in 2nd gear. (E)
Fully depress the accelerator pedal, and then fully release it at an engine speed of 3000 rpm or more. (F)
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.

Read the pending DTCs.

Powertrain > Engine and ECT > Trouble Codes

Tech Tips

Take a snapshot under stable conditions such as idling, confirm that Common Rail Pressure is within +/-10000 kPa of Target Common Rail Pressure.

Result

Result	Proceed to
DTC is not output	A
DTC P0087, P0088, P0191, P1229 or P1272 is output	B

DTC CAUSED BY RUNNING OUT OF FUEL

CLEAR DTC

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

Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs

Result

Proceed to
NEXT

CHECK ENGINE STARTING CONDITION

OK
The engine can be started within 4 seconds.

Note

Just after starting the engine, visually check for fuel leaks from the supply pump assembly, injector assemblies, common rail assembly, and fuel pipes in high-pressure areas.

Result

Proceed to
OK
NG

GO TO STEP 17 Click here

BLEED AIR FROM FUEL SYSTEM

Bleed the air from the fuel system.

Click here

Result

Proceed to
NEXT

CHECK ENGINE STARTING CONDITION

Check whether the engine can be started.

OK
The engine can be started.

Result

Proceed to
OK
NG

GO TO STEP 17 Click here

CHECK AND REPLACE FUEL INLET LINE

Check the fuel line from fuel tank to the supply pump, and repair or replace the malfunctioning part if necessary.

Check if the fuel filter is clogged.
Check for fuel freezing in the fuel line when the cold condition.
Check for clogs or leaks in the fuel pipe and hose between the fuel tank and supply pump assembly.

Result

Proceed to
NEXT

CHECK ENGINE STARTING CONDITION

Check whether the engine can be started.

OK
The engine can be started.

Result

Proceed to
OK
NG

GO TO STEP 17 Click here

REPLACE SUPPLY PUMP ASSEMBLY (SUCTION CONTROL VALVE)

Replace the supply pump assembly.

Click here

Result

Proceed to
NEXT

BLEED AIR FROM FUEL SYSTEM

Bleed the air from the fuel system.

Click here

Result

Proceed to
NEXT

CHECK ENGINE STARTING CONDITION

Check whether the engine can be started.

OK
The engine can be started.

Result

Proceed to
OK
NG

GO TO STEP 17 Click here

REPLACE COMMON RAIL ASSEMBLY (PRESSURE CONTROL VALVE)

Replace the common rail assembly.

Click here

Result

Proceed to
NEXT

BLEED AIR FROM FUEL SYSTEM

Bleed the air from the fuel system.

Click here

Result

Proceed to
NEXT

CHECK FREEZE FRAME DATA (TARGET PUMP SCV CURRENT)

Read the value of Target Pump SCV Current in Freeze Frame Data recorded in Step 1.

Standard

GTS Display (Freeze Frame Data Item)	Specified Condition
Target Pump SCV Current	Below 1530 mA

Result

Proceed to
OK
NG

CHECK HARNESS AND CONNECTOR (SUCTION CONTROL VALVE - ECM) Click here

CHECK FREEZE FRAME DATA (COMMON RAIL PRESSURE)

Read the value of Common Rail Pressure and Target Common Rail Pressure in Freeze Frame Data recorded in Step 1.

Standard

GTS Display (Freeze Frame Data Item)	Specified Condition
Common Rail Pressure	Below 195000 kPa

Start the engine and warm it up.

Enter the following menus: Powertrain / Engine and ECT / Data List / Common Rail Pressure and Target Common Rail Pressure.

Powertrain > Engine and ECT > Data List

Tester Display
Target Common Rail Pressure
Common Rail Pressure

Check that the Common Rail Pressure is within the specification below.

Standard
Common Rail Pressure is within +/-10000 kPa of Target Common Rail Pressure when engine is idling.

Result

Proceed to

Both conditions are met:

Common Rail Pressure of Freeze Frame Data is 195000 kPa or higher
Common Rail Pressure is within +/-10000 kPa of Target Common Rail Pressure when engine is idling

Except above

REPLACE COMMON RAIL ASSEMBLY Click here

CHECK FREEZE FRAME DATA (INJECTION FEEDBACK VAL #1 TO #4)

Tech Tips

Perform the procedure below to identify the malfunctioning cylinder.

Start the engine and allow it to idle until the engine coolant temperature reaches 75°C (167°F) or higher.
Allow the engine to idle for 30 seconds or more.
Connect the GTS to the DLC3.

Enter the following menus: Powertrain / Engine and ECT / Data List / Injection Feedback Val #1 to #4.

Powertrain > Engine and ECT > Data List

Tester Display
Injection Feedback Val #1
Injection Feedback Val #2
Injection Feedback Val #3
Injection Feedback Val #4

Read the value.

Standard

GTS Display (Data List Item)

Engine Condition

Specified Condition

Injection Feedback Val #1

Injection Feedback Val #2

Injection Feedback Val #3

Injection Feedback Val #4

Idling

Between -2.0 mm³/st and 2.0 mm³/st

Result

Proceed to
OK
NG

PERFORM ACTIVE TEST USING GTS (FUEL CUT FOR IDENTIFYING MALFUNCTION) Click here

PERFORM ACTIVE TEST USING GTS (TEST THE FUEL LEAK)

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

Enter the following menus: Powertrain / Engine and ECT/ Active Test / Test the Fuel Leak / Data List / Common Rail Pressure, Target Common Rail Pressure and Target Pump SCV Current.

Powertrain > Engine and ECT > Active Test

Active Test Display
Test the Fuel Leak

Data List Display
Target Common Rail Pressure
Common Rail Pressure
Target Pump SCV Current

Check the Common Rail Pressure is within +/-10000 kPa of Target Common Rail Pressure when engine is idling and running at 3000 rpm without load.
Take a snapshot with the GTS during the Active Test.
Maintain an engine speed of 3500 rpm, and press the "Start" button.

Measure the difference between the target fuel pressure (Target Common Rail Pressure) and the actual fuel pressure (Common Rail Pressure) when the Active Test / Test the Fuel Leak is performed.

Note

The EPS, ABS and SRS warning lights may blink when the engine speed exceeds 3500 rpm during this test.

Tech Tips

To ensure accurate measurements, perform the Active Test with measurements 5 times or more.

Standard
The difference between the target fuel pressure and the actual fuel pressure is less than 15000 kPa when the target fuel pressure reaches the maximum value approximately 2 seconds after the Active Test starts.

Read the value of Target Pump SCV Current in Data List when the Active Test / Test the Fuel Leak is performed.

Standard current
Target Pump SCV Current is less than 1530 mA.

Tech Tips

If the value of Target Pump SCV Current stored in Freeze Frame Data is higher than standard, intermittent sticking of the suction control valve may be the cause of the malfunction.

Result

Result	Proceed to
Both results are within standard	A
Difference between target fuel pressure and actual fuel pressure is 15000 kPa or higher	B
Target Pump SCV Current value is out of standard range	C
Both conditions are met: Common Rail Pressure is 195000 kPa or higher during Active Test at 3500 rpm Common Rail Pressure is within +/-10000 kPa of Target Common Rail Pressure when engine is idling	D

GO TO STEP 34 Click here

GO TO STEP 30 Click here

GO TO STEP 28 Click here

REPLACE SUPPLY PUMP ASSEMBLY

Tech Tips

If the supply pump assembly has already been replaced in step 12, proceed to the next step.

Replace the supply pump assembly.

Click here

Result

Proceed to
NEXT

BLEED AIR FROM FUEL SYSTEM

Bleed the air from the fuel system.

Click here

Result

Proceed to
NEXT

PERFORM ACTIVE TEST USING GTS (TEST THE FUEL LEAK)

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

Enter the following menus: Powertrain / Engine and ECT/ Active Test / Test the Fuel Leak / Data List / Common Rail Pressure and Target Common Rail Pressure.

Powertrain > Engine and ECT > Active Test

Active Test Display
Test the Fuel Leak

Data List Display
Target Common Rail Pressure
Common Rail Pressure

Take a snapshot with the GTS during the Active Test.
Maintain an engine speed of 3500 rpm, and then press the "Start" button.

Measure the difference between the target fuel pressure (Target Common Rail Pressure) and the actual fuel pressure (Common Rail Pressure) when the Active Test / Test the Fuel Leak is performed.

CAUTION:

The EPS, ABS and SRS warning lights may blink when the engine speed exceeds 3500 rpm during this test.

Tech Tips

To ensure accurate measurements, perform the Active Test with measurements 5 times or more.

Standard
The difference between the target fuel pressure and the actual fuel pressure is less than 15000 kPa when the target fuel pressure reaches the maximum value approximately 2 seconds after the Active Test starts.

Result

Result	Proceed to
Difference between target fuel pressure and actual fuel pressure is 15000 kPa or higher	A
Difference between target fuel pressure and actual fuel pressure is less than 15000 kPa	B

GO TO STEP 28 Click here

GO TO STEP 34 Click here

PERFORM ACTIVE TEST USING GTS (FUEL CUT FOR IDENTIFYING MALFUNCTION)

Start the engine and allow it to idle until the engine coolant temperature reaches 75°C (167°F) or higher.
Connect the GTS to the DLC3.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Select Cylinder Fuel Cut.

Powertrain > Engine and ECT > Active Test

Tester Display

Control the Select Cylinder Fuel Cut

Check the four cylinders in sequence to identify a faulty cylinder.

Tech Tips

DTCs may be output after this Active Test. Make sure to check for DTCs after this Active Test. If any DTCs are output, make sure to clear them.

Click here
If the engine idle speed does not change when a injector is disabled, the cylinder being tested is malfunctioning.

Result

Proceed to
NEXT

REPLACE INJECTOR ASSEMBLY (INJECTOR OF MALFUNCTIONING CYLINDER)

Replace the injector assembly of the malfunctioning cylinder.

Click here

Result

Proceed to
NEXT

PERFORM REGISTRATION AND INITIALIZATION

Perform Registration and Initialization.

Click here

Result

Proceed to
NEXT

BLEED AIR FROM FUEL SYSTEM

Bleed the air from the fuel system.

Click here

Result

Proceed to
NEXT

GO TO STEP 34 Click here

REPLACE COMMON RAIL ASSEMBLY

Tech Tips

If the common rail assembly has already been replaced in step 15, proceed to the next step.

Replace the common rail assembly.

Click here

Result

Proceed to
NEXT

BLEED AIR FROM FUEL SYSTEM

Bleed the air from the fuel system.

Click here

Result

Proceed to
NEXT

GO TO STEP 34 Click here

CHECK HARNESS AND CONNECTOR (SUCTION CONTROL VALVE - ECM)

Disconnect the suction control valve connector.
Disconnect the ECM connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
B123-2 - B212-30 (PCV)	Always	Below 1 Ω
B123-2 or B212-30 (PCV) - Body ground and other terminals	Always	10 kΩ or higher

Result

Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

REPLACE SUPPLY PUMP ASSEMBLY

Tech Tips

If the supply pump assembly has already been replaced in step 12, proceed to the next step.

Replace the supply pump assembly.

Click here

Result

Proceed to
NEXT

BLEED AIR FROM FUEL SYSTEM

Bleed the air from the fuel system.

Click here

Result

Proceed to
NEXT

GO TO STEP 34 Click here

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result

Proceed to
NEXT

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs
Turn the ignition switch off and wait for 30 seconds.
If DTC P1272 was stored in the result of Step 1, perform the (A) to (C) confirmation driving pattern process. If the result of Step 1 is other than DTC P1272, perform the (D) to (F) confirmation driving pattern process.
Start the engine when the fuel temperature is 15°C (59°F) or less. (A)
Drive the vehicle in 2nd gear. (B)

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Fully depress the accelerator pedal, and then fully release it at an engine speed of 3000 rpm or more. (C)
Allow the engine to idle until the engine coolant temperature reaches 75°C (167°F) or higher. (D)
Drive the vehicle in 2nd gear. (E)
Fully depress the accelerator pedal, and then fully release it at an engine speed of 3000 rpm or more. (F)
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.

Confirm that the pending DTC is not output again.

Powertrain > Engine and ECT > Trouble Codes

Result

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