SFI SYSTEM, Diagnostic DTC:P1603, P1605

DESCRIPTION

After starting the engine, this DTC is stored when the engine stops without the ignition switch being operated.

Using the intelligent tester, 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 has ran out of fuel before performing troubleshooting, as this DTC is also stored when the engine stalls due to running out of fuel.

This DTC is stored if the engine speed drops below the set speed.

Using the intelligent tester, 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 idling is unstable due to running out of fuel.

1. 

   Reference waveforms showing a normal cold engine start

2. 

   Reference waveforms showing a normal warm engine start

3. Reference values when there is an air leak in the intake system during rough idling

   Table 1. Freeze Frame Data P1605 Rough Idling

   Engine
   Current	P1605: Rough Idling
   	Time Freeze Frame Data
   	Item	Data1	Data2	Data3	Data4	Data5	Unit
   	Engine Speed	647	649	586	378	182	rpm
   	Calculate Load	26.2	26.2	29.1	42.6	58.6	%
   	Vehicle Load	11.7	11.7	12.1	48.7	61.2	%
   	MAF	2.87	2.87	2.87	6.23	3.04	gm/sec
   	Atmosphere Pressure	99	99	99	99	99	kPa
   	Coolant Temp	86	86	86	86	86	°C
   	Intake Air	42	42	42	42	42	°C
   	Battery Voltage	13.515	13.515	13.264	12.892	12.792	V
   	Throttle Sensor Volt %	14.5	14.5	14.5	16.8	17.2	%
   	Throttl Sensor #2 Volt %	46.2	46.2	46.2	48.4	49.2	%
   	Throttle Sensor Position	0.0	0.0	0.0	0.0	0.0	%
   	Throttle Motor DUTY	14.5	14.5	14.5	17.2	17.2	%
   	Injector (Port)	2159	2161	2148	2190	2190	μs
   	Injection Volume (Cylinder 1)	0.093	0.093	0.093	0.095	0.095	ml
   	Fuel Pump/Speed Status	ON	ON	ON	ON	ON
   	EVAP (Purge) VSV	13.3	13.3	13.3	13.3	13.3	%
   	Evap Purge Flow	2.9	2.9	2.9	3.2	3.2	%
   	Purge Density Learn Value	0.891	0.891	0.891	0.891	0.891
   	EVAP System Vent Valve	OFF	OFF	OFF	OFF	OFF
   	EVAP purge VSV	OFF	OFF	OFF	OFF	OFF
   	Purge Cut VSV Duty	8.5	8.5	8.5	8.5	8.5	%
   	Target Air-Fuel Ratio	0.998	0.998	0.998	0.998	0.998
   	AF Lambda B1S1	0.999	0.997	1.001	1.038	1.118
   	AF Lambda B2S1	0.997	0.994	0.999	1.036	1.112
   	AFS Voltage B1S1	3.258	3.242	3.284	3.521	3.715	V
   	AFS Voltage B2S1	3.251	3.306	3.324	3.497	3.689	V
   	O2S B1S2	0.740	0.740	0.740	0.740	0.740	V
   	O2S B2S2	0.760	0.760	0.760	0.760	0.760	V
   	Short FT #1	-1.563	-1.563	-1.563	-1.563	-1.563	%
   	Long FT #1	6.250	6.250	6.250	6.250	6.250	%
   	Total FT #1	0.054	0.054	0.054	0.054	0.054
   	Sort FT #2	-0.782	-0.782	-0.782	-0.782	-0.782	%
   	Long FT #2	7.031	7.031	7.031	7.031	7.031	%
   	Total FT #2	0.062	0.062	0.062	0.062	0.062
   	Fuel System Status #1	CL	CL	CL	CL	CL
   	Fuel System Status #2	CL	CL	CL	CL	CL
   	IGN Advance	22.0	22.0	22.5	23.5	23.5	deg
   	Knock Feedback Value	-1.5	-1.5	-1.5	-1.5	-1.5	CA
   	Knock Correct Learn Value	17.0	17.0	17.0	17.0	17.0	CA
   	Starter Signal	Close	Close	Close	Close	Close
   	Ambient Temperature	21	21	21	21	21	°C

PROCEDURE

1. Click here

   CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P1603 OR P1605)

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch on (IG).

   3. Turn the tester on.

   4. Enter the following menus: Powertrain / Engine and ECT / DTC.

   5. Read the DTCs.

      Result
      Result Proceed to Only DTC P1603 and/or P1605 are output A DTCs other than P1603 and P1605 are output B

   
   
   • AClick here
   • BClick here
2. Click here

   READ FREEZE FRAME DATA

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch on (IG).

   3. 

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

      Result

      Problem Symptom Freeze Frame Data Item for DTC P1605 Suspected Area Proceed to Closed Throttle Position SW Engine Speed Total of Short FT and Long FT When idling or decelerating, engine speed slowly decreases and engine stalls All 5 sets of freeze frame data are ON Decreases slowly*1 All 5 sets of freeze frame data are +15% or more*2 Air suction Sensor malfunction (value from sensor too lean) Fuel supply problem A At least 1 of the 5 sets of freeze frame data is -15% or less*3 Sensor malfunction (value from sensor too rich) B All 5 sets of freeze frame data are from -15% to +15% Intake air volume insufficient Ignition timing incorrect C When idling or decelerating, engine speed rapidly decreases and engine stalls Decreases rapidly*1 - Injection stoppage, ignition stoppage Load from external parts D When accelerating or driving at constant speed, engine stalls*4 At least one is OFF - - Sensor malfunction Injection stoppage, ignition stoppage Fuel supply problem E

      Tip:
      

      • *1: A rapid decrease in engine speed may have been caused by an electrical malfunction in the shared wiring of all or multiple cylinders, an increase in load from external parts, etc. The engine speed is considered to have decreased rapidly if either of the following conditions apply.

        Otherwise, the engine speed is considered to have decreased slowly.

      • 
        

        1. In the freeze frame data, the decrease in engine speed from #3 to #5 is 400 rpm or more.

        2. In the freeze frame data, the engine speed at #5 is 120 rpm or less.

      
      

      • If the vehicle speed is 15 km/h (9.3 mph) or less and the difference between Engine Speed and SPD (NT) is 100 rpm or less, inspect the automatic transaxle. (Depending on the rate of vehicle deceleration, the engine speed may have decreased due to the A/T lock-up release being late.)

      • *2: When a DTC is stored, feedback compensation increases because the air-fuel ratio is determined to be lean.

      • *3: When a DTC is stored, feedback compensation decreases because the air-fuel ratio is determined to be rich.

      • *4: This item should be checked when DTC P1603 is output and is not necessary to check when only P1605 is output.

   
   
   • AClick here
   • BClick here
   • CClick here
   • DClick here
   • EClick here
3. Click here

   CHECK AIR INDUCTION SYSTEM

   
   

   1. Check for air suction in the air induction system [vacuum hose disconnection, cracks, gaskets, etc.].

      Tip:
      

      • If the accelerator pedal is released after racing the engine, the inspection is easier to perform because the vacuum inside the intake pipes increases and the air suction noise becomes louder.

      • If Short FT and Long FT are largely different from the normal values when idling (the intake air volume is small) and almost the same as the normal values when racing the engine (the intake air volume is high), air leakage may be present.

      OK
      There is no air suction.

   
   
   • OKClick here
   • NGClick here
4. Click here

   CHECK PURGE VSV

   
   
   1. 

      Disconnect the vacuum hose (on the canister side) of the purge VSV.

   2. Start the engine.

   3. Idle the engine.

   4. Disconnect the connector of the purge VSV.

   5. Check if air flows through the purge VSV.

      OK
      Air does not flow.

   6. Connect the connector of the purge VSV.

   7. Connect the purge hose of the purge VSV.

      Tip:

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

   
   
   • OKClick here
   • NGClick here
5. Click here

   READ FREEZE FRAME DATA

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch on (IG).

   3. Using the tester, 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 for DTC P1605 Result Suspected Area Proceed to Stop Light Switch At least 1 of the 5 sets of freeze frame data is ON Air suction from brake booster A All 5 sets of freeze frame data are OFF - B

   
   
   • AClick here
   • BClick here
6. Click here

   READ VALUE USING INTELLIGENT TESTER (SHORT FT #1 OR SHORT FT #2)

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch on (IG).

   3. Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes.

   4. Idle the engine.

   5. Turn the tester on.

   6. Enter the following menus: Powertrain / Engine and ECT / Data List / Short FT #1 or Short FT #2.

      Standard
      Short FT #1 or Short FT #2 changes by +10% or less.

      Tip:
      

      • Even if the results are normal, the brake booster may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the brake booster (refer to step 57).

      
      

      • When air suction is present, the feedback compensation increases because the air-fuel ratio becomes lean.

      
      

      • It is also possible to perform the airtightness inspection to check the brake booster (Click here).

   
   
   • OKClick here
   • NGClick here
7. Click here

   READ FREEZE FRAME DATA

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch on (IG).

   3. Using the tester, 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 for DTC P1605 Result Suspected Area Proceed to Calculate Load Below 90% of the current value of the vehicle*1 Mass air flow meter sub-assembly A AFS Voltage B1S1 and AFS Voltage B2S1 3.3 V or higher*2 Air fuel ratio sensor Wire harness or connector Actual air-fuel ratio abnormal B Both freeze frame data items listed above Values are other than above - C

      Tip:
      

      • Try to operate 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 the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data.

      • *1: If the mass air flow meter sub-assembly is malfunctioning and incorrectly measures the pressure to be less than the actual intake manifold pressure, the freeze frame data will show a low engine load value.

      • *2: If the air fuel ratio sensor is malfunctioning and constantly outputs a value indicating the air-fuel ratio is lean, the actual air-fuel ratio will become rich and the engine may stall.

   
   
   • AClick here
   • BClick here
   • CClick here
8. Click here

   CHECK MASS AIR FLOW METER SUB-ASSEMBLY

   
   

   1. Remove the mass air flow meter sub-assembly.

   2. Check for foreign matter in the air flow passage of the mass air flow meter sub-assembly.

      Result
      Result Proceed to Visible foreign matter is present A Visible foreign matter is not present B

   3. Install the mass air flow meter sub-assembly.

      Tip:

      Even if the results are normal, the mass air flow meter sub-assembly may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the mass air flow meter sub-assembly (refer to step 57).

   
   
   • AClick here
   • BClick here
9. Click here

   PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE INJECTION VOLUME)

   
   
   1. 

      Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch on (IG).

   3. Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes.

   4. Idle the engine.

   5. Turn the tester on.

   6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.

   7. Read the output voltage from the air fuel ratio sensor when increasing and decreasing the fuel injection volume.

      Standard
      Tester Display Specified Condition Control the Injection Volume for A/F Sensor (25 %) Air fuel ratio sensor output voltage is below 3.1 V Control the Injection Volume for A/F Sensor (-12.5 %) Air fuel ratio sensor output voltage is higher than 3.4 V

      Result
      Result Proceed to NG A OK B

      Tip:
      

      • The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds.

      • Even if the results are normal, the air fuel ratio sensor may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the air fuel ratio sensor (refer to step 57).

   
   
   • AClick here
   • BClick here
10. Click here

    CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR POWER SOURCE)

    
    

    1. Disconnect the air fuel ratio sensor connector.

    2. Turn the ignition switch on (IG).

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

       Standard Voltage
       Tester Connection Switch Condition Specified Condition B20-2 (+B) - Body ground Ignition switch on (IG) 11 to 14 V B19-2 (+B) - Body ground Ignition switch on (IG) 11 to 14 V

       Tip:
       

       • 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.

    4. Reconnect the air fuel ratio sensor connector.

    
    
    • OKClick here
    • NGClick here
11. Click here

    CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM)

    
    

    1. Disconnect the air fuel ratio sensor connector.

    2. Disconnect the ECM connector.

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

       Standard Resistance (Check for Open)
       Tester Connection Condition Specified Condition B20-1 (HA1A) - B47-17 (HA1A) Always Below 1 Ω B20-3 (A1A+) - B48-1 (A1A+) Always Below 1 Ω B20-4 (A1A-) - B48-2 (A1A-) Always Below 1 Ω B19-1 (HA2A) - B47-19 (HA2A) Always Below 1 Ω B19-3 (A2A+) - B48-7 (A2A+) Always Below 1 Ω B19-4 (A2A-) - B48-8 (A1A-) Always Below 1 Ω

       Standard Resistance (Check for Short)

       Tester Connection Condition Specified Condition B20-1 (HA1A) or B47-17 (HA1A) - Body ground Always 10 kΩ or higher B20-3 (A1A+) or B48-1 (A1A+) - Body ground Always 10 kΩ or higher B20-4 (A1A-) or B48-2 (A1A-) - Body ground Always 10 kΩ or higher B19-1 (HA2A) or B47-19 (HA2A) - Body ground Always 10 kΩ or higher B19-3 (A2A+) or B48-7 (A2A+) - Body ground Always 10 kΩ or higher B19-4 (A2A-) or B48-8 (A1A-) - Body ground Always 10 kΩ or higher

       Result
       Result Proceed to NG A OK B

       Tip:
       

       • 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.

    4. Reconnect the ECM connector.

    5. Reconnect the air fuel ratio sensor connector.

    
    
    • AClick here
    • BClick here
12. Click here

    READ FREEZE FRAME DATA

    
    

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Using the tester, 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 for DTC P1605 Result Proceed to Initial Engine Coolant Temp, Ambient Temp for A/C, Initial Intake Air Temp Difference in temperature between each item is below 10°C (18°F)*1 A Difference in temperature between each item is 10°C (18°F) or more*2 B

       Tip:
       

       • *1: A long time had elapsed after stopping the engine.

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

    
    
    • AClick here
    • BClick here
13. Click here

    READ FREEZE FRAME DATA

    
    

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. 

       Using the tester, 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 for DTC P1605 Result Suspected Area Proceed to Initial Engine Coolant Temp, Coolant Temp, Engine Run Time Range A Engine coolant temperature sensor Thermostat A Range B Engine coolant temperature sensor B Range C - C

       Tip:

       This step is not directly related to engine stall.

    
    
    • AClick here
    • BClick here
    • CClick here
14. Click here

    INSPECT THERMOSTAT

    Tip:

    For the thermostat inspection, refer to the following procedures (Click here).

    Result
    Result Proceed to NG A OK B

    Tip:

    This step is not directly related to engine stall.

    
    
    • AClick here
    • BClick here
15. Click here

    READ FREEZE FRAME DATA

    
    

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Using the tester, 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 for DTC P1605 Result Suspected Area Proceed to Coolant Temp 120°C (248°F) or more Engine coolant temperature sensor A Coolant Temp, Ambient Temp for A/C Engine coolant temperature is lower than outside temperature by 15°C (27°F) or more Engine coolant temperature sensor Both freeze frame data items listed above Values are other than above - B

    
    
    • AClick here
    • BClick here
16. Click here

    INSPECT ENGINE COOLANT TEMPERATURE SENSOR

    Tip:

    For the engine coolant temperature sensor inspection, refer to the following procedures (Click here).

    Result
    Result Proceed to NG A OK B

    Tip:

    Even if the results are normal, the engine coolant temperature sensor may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the engine coolant temperature sensor (refer to step 57).

    
    
    • AClick here
    • BClick here
17. Click here

    READ FREEZE FRAME DATA

    
    

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Using the tester, 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 for DTC P1605 Result Suspected Area Proceed to EVAP (Purge) VSV At least 1 of the 5 sets of freeze frame data is not 0% Purge VSV A All 5 sets of freeze frame data are 0% - B

       Tip:

       If the purge VSV is stuck closed, air-fuel ratio compensation by the purge VSV is incorrectly adjusted, and then the air-fuel ratio becomes lean and the engine may stall.

    
    
    • AClick here
    • BClick here
18. Click here

    PERFORM ACTIVE TEST USING INTELLIGENT TESTER (ACTIVATE THE VSV FOR EVAP CONTROL)

    
    
    1. 

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

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch on (IG).

    4. Start the engine.

    5. Turn the tester on.

    6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for Evap Control.

    7. When the purge VSV is operated using the tester, check whether the part of the purge VSV applies suction to your finger.

       Standard
       Tester Operation Specified Condition ON Purge VSV port applies suction to finger OFF Purge VSV port applies no suction to finger

       Result
       Result Proceed to NG A OK B

       Tip:
       

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

       • Even if the results are normal, the purge VSV may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the purge VSV (refer to step 57).

    
    
    • AClick here
    • BClick here
19. Click here

    INSPECT PURGE VSV

    
    

    1. Disconnect the purge VSV connector.

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

       Standard Resistance
       Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 23 to 26 Ω

       Table 2. Text in Illustration

       *a	Component without harness connected (Purge VSV)

    3. Reconnect the purge VSV connector.

    
    
    • OKClick here
    • NGClick here
20. Click here

    CHECK HARNESS AND CONNECTOR (PURGE VSV POWER SOURCE)

    
    

    1. Disconnect the purge VSV connector.

    2. Turn the ignition switch on (IG).

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

       Standard Voltage
       Tester Connection Switch Condition Specified Condition B29-1 - Body ground Ignition switch on (IG) 11 to 14 V

       Tip:
       

       • 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.

    4. Reconnect the purge VSV connector.

    
    
    • OKClick here
    • NGClick here
21. Click here

    CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM)

    
    

    1. Disconnect the purge VSV connector.

    2. Disconnect the ECM connector.

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

       Standard Resistance (Check for Open)
       Tester Connection Condition Specified Condition B29-2 - B48-18 (PRG) Always Below 1 Ω

       Standard Resistance (Check for Short)
       Tester Connection Condition Specified Condition B29-2 or B48-18 (PRG) - Body ground Always 10 kΩ or higher

       Tip:
       

       • 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.

    4. Reconnect the ECM connector.

    5. Reconnect the purge VSV connector.

    
    
    • OKClick here
    • NGClick here
22. Click here

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

    
    

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Turn the tester on.

    4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.

    5. Check whether the fuel pump operating sound occurs when performing the Active Test on the tester.

       Standard
       Tester Operation Specified Condition ON Operating sound heard OFF Operating sound not heard

       Result
       Result Proceed to NG A OK B

       Tip:
       

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

       • While performing the Active Test, make sure that there is no fuel leakage from the pipes, no signs that fuel has leaked, and no fuel smell.

       • If the fuel pump operating noise is abnormal, proceed to step 23.

    
    
    • AClick here
    • BClick here
23. Click here

    INSPECT FUEL PUMP

    
    
    1. 

       Disconnect the fuel pump connector.

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

       Standard Resistance
       Tester Connection Condition Reference Value 4 - 5 20°C (68°F) 0.2 to 3.0 Ω

       Table 3. Text in Illustration

       *a	Component without harness connected (Fuel Pump)

    3. Reconnect the fuel pump connector.

    
    
    • OKClick here
    • NGClick here
24. Click here

    CHECK FUEL SYSTEM

    
    

    1. 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

       Tip:

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

    
    
    • AClick here
    • BClick here
25. Click here

    READ FREEZE FRAME DATA

    
    

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Using the tester, 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 for DTC P1605 Result Suspected Area Proceed to Calculate Load 110% or more of the current value of the vehicle*1 Mass air flow meter sub-assembly A AFS Voltage B1S1 and AFS Voltage B2S1 Below 3.3 V*2 Air fuel ratio sensor Harness and connector Actual air-fuel ratio abnormal B Both freeze frame data items listed above Values are other than above - C

       Tip:
       

       • Try to operate 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 the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data.

       • *1: If the mass air flow meter sub-assembly is malfunctioning and incorrectly measures the intake air volume to be higher than the actual volume of air flowing through the intake manifold, the freeze frame data will show a high engine load value.

       • *2: As the air fuel ratio sensor output is low before the sensor warms up, the value at that time cannot be used for diagnosis. If the air fuel ratio sensor is malfunctioning and constantly outputs a value indicating the air-fuel ratio is rich, the actual air-fuel ratio will become lean and the engine may stall.

    
    
    • AClick here
    • BClick here
    • CClick here
26. Click here

    CHECK MASS AIR FLOW METER SUB-ASSEMBLY

    
    

    1. Remove the mass air flow meter sub-assembly.

    2. Check for foreign matter in the air flow passage of the mass air flow meter sub-assembly.

       Result
       Result Proceed to Visible foreign matter is present A Visible foreign matter is not present B

       Tip:

       Even if the results are normal, the mass air flow meter sub-assembly may have been malfunctioning. Continue this inspection procedure until step 34, and if there are no problems with other parts, replace the mass air flow meter sub-assembly (refer to step 57).

    
    
    • AClick here
    • BClick here
27. Click here

    PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE INJECTION VOLUME FOR A/F SENSOR)

    
    
    1. 

       Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes.

    4. Idle the engine.

    5. Turn the tester on.

    6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.

    7. Read the output voltage from the air fuel ratio sensor when increasing and decreasing the fuel injection volume.

       Standard
       Tester Display Specified Condition Control the Injection Volume for A/F Sensor (25%) Air fuel ratio sensor output voltage is below 3.1 V Control the Injection Volume for A/F Sensor (-12.5%) Air fuel ratio sensor output voltage is higher than 3.4 V

       Result
       Result Proceed to NG A OK B

       Tip:
       

       • The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds.

       • Even if the results are normal, the air fuel ratio sensor may have been malfunctioning. Continue this inspection procedure until step 34, and if there are no problems with other parts, replace the air fuel ratio sensor (refer to step 57).

    
    
    • AClick here
    • BClick here
28. Click here

    CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR POWER SOURCE)

    
    

    1. Disconnect the air fuel ratio sensor connector.

    2. Turn the ignition switch on (IG).

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

       Standard Voltage
       Tester Connection Switch Condition Specified Condition B20-2 (+B) - Body ground Ignition switch on (IG) 11 to 14 V B19-2 (+B) - Body ground Ignition switch on (IG) 11 to 14 V

       Tip:
       

       • 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.

    4. Reconnect the air fuel ratio sensor connector.

    
    
    • OKClick here
    • NGClick here
29. Click here

    CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM)

    
    

    1. Disconnect the air fuel ratio sensor connector.

    2. Disconnect the ECM connector.

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

       Standard Resistance (Check for Open)
       Tester Connection Condition Specified Condition B20-1 (HA1A) - B47-17 (HA1A) Always Below 1 Ω B20-3 (A1A+) - B48-1 (A1A+) Always Below 1 Ω B20-4 (A1A-) - B48-2 (A1A-) Always Below 1 Ω B19-1 (HA2A) - B47-19 (HA2A) Always Below 1 Ω B19-3 (A2A+) - B48-7 (A2A+) Always Below 1 Ω B19-4 (A2A-) - B48-8 (A1A-) Always Below 1 Ω

       Standard Resistance (Check for Short)

       Tester Connection Condition Specified Condition B20-1 (HA1A) or B47-17 (HA1A) - Body ground Always 10 kΩ or higher B20-3 (A1A+) or B48-1 (A1A+) - Body ground Always 10 kΩ or higher B20-4 (A1A-) or B48-2 (A1A-) - Body ground Always 10 kΩ or higher B19-1 (HA2A) or B47-19 (HA2A) - Body ground Always 10 kΩ or higher B19-3 (A2A+) or B48-7 (A2A+) - Body ground Always 10 kΩ or higher B19-4 (A2A-) or B48-8 (A1A-) - Body ground Always 10 kΩ or higher

       Tip:
       

       • 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.

    4. Reconnect the ECM connector.

    5. Reconnect the air fuel ratio sensor connector.

    
    
    • OKClick here
    • NGClick here
30. Click here

    READ FREEZE FRAME DATA

    
    

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Using the tester, 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 for DTC P1605 Result Proceed to Initial Engine Coolant Temp, Ambient Temp for A/C, Initial Intake Air Temp Difference in temperature between each item is below 10°C (18°F)*1 A Difference in temperature between each item is 10°C (18°F) or more*2 B

       Tip:
       

       • *1: A long time had elapsed after stopping the engine.

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

    
    
    • AClick here
    • BClick here
31. Click here

    READ FREEZE FRAME DATA

    
    

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. 

       Using the tester, confirm the vehicle conditions when the DTC was stored which are recorded in the freeze frame data.

       Result
       Freeze Frame Data Item for DTC P1605 Result Suspected Area Proceed to Initial Engine Coolant Temp, Coolant Temp, Engine Run Time Range A Engine coolant temperature sensor Thermostat A Range B Engine coolant temperature B Range C - C

       Tip:

       This step is not directly related to engine stall.

    
    
    • AClick here
    • BClick here
    • CClick here
32. Click here

    INSPECT THERMOSTAT

    Tip:

    For the thermostat inspection, refer to the following procedures (Click here).

    Result
    Result Proceed to NG A OK B

    Tip:

    This step is not directly related to engine stall.

    
    
    • AClick here
    • BClick here
33. Click here

    READ FREEZE FRAME DATA

    
    

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Using the tester, 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 for DTC P1605 Result Suspected Area Proceed to Coolant Temp 120°C (248°F) or higher Engine coolant temperature sensor A Coolant Temp, Ambient Temp for A/C Engine coolant temperature is lower than outside temperature by 15°C (27°F) or more Engine coolant temperature sensor Both freeze frame data items listed above Values are other than above - B

    
    
    • AClick here
    • BClick here
34. Click here

    INSPECT ENGINE COOLANT TEMPERATURE SENSOR

    Tip:

    For the engine coolant temperature sensor inspection, refer to the following procedures (Click here).

    Result
    Result Proceed to NG A OK B

    Tip:

    Even if the results are normal, the engine coolant temperature sensor may have been malfunctioning. If there are no problems with other parts, replace the engine coolant temperature sensor (refer to step 57).

    
    
    • AClick here
    • BClick here
35. Click here

    READ FREEZE FRAME DATA

    
    

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Using the tester, 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 for DTC P1605 Result Suspected Area Proceed to Total of ISC Learning Value and ISC Feedback Value Below 80% of the current value of the vehicle*1 Throttle with motor body assembly A 120% or more of the current value of the vehicle*2 B From 80 to 120% of the current value of the vehicle - C

       Tip:
       

       • Try to operate 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 the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data.

       • *1: If the throttle with motor body assembly has a temporary problem in which it cannot fully close, the intake air volume and engine speed increase. As a result, the ISC learning amount becomes less than the standard. At this time, if the throttle with motor body assembly returns to normal and fully closes, the intake air volume will be insufficient and the engine may stall.

       • *2: If carbon accumulates on the throttle with motor body assembly and the intake air volume decreases, the ISC learning amount is increased to maintain the idling speed. If this situation continues, the ISC learning amount reaches the upper limit, the idling speed cannot be maintained causing idling to become unstable, and the engine may stall.

    
    
    • AClick here
    • BClick here
    • CClick here
36. Click here

    CHECK THROTTLE WITH MOTOR BODY ASSEMBLY

    
    

    1. Check for foreign matter and signs that the throttle with motor body assembly was stuck, and also check that the valve and shaft move smoothly during operation.

       Result
       Result Proceed to NG A OK B

       Tip:

       Even if the results are normal, the throttle with motor body assembly may have been malfunctioning. Continue this inspection procedure until step 42, and if there are no problems with other parts, replace the throttle with motor body assembly (refer to step 57).

    
    
    • AClick here
    • BClick here
37. Click here

    CHECK THROTTLE WITH MOTOR BODY ASSEMBLY

    
    

    1. Check if carbon is in the air flow passage of the throttle with motor body assembly.

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

       Tip:

       Even if the results are normal, the throttle with motor body assembly may have been malfunctioning. Continue this inspection procedure until step 42, and if there are no problems with other parts, replace the throttle with motor body assembly (refer to step 57).

    
    
    • AClick here
    • BClick here
38. Click here

    PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE VVT SYSTEM)

    
    

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Turn the tester on.

    4. Warm up the engine.

    5. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1) or Control the VVT System (Bank 2).

       Tip:

       When performing the Active Test, make sure the A/C is on and the shift lever is in P or N.

    6. Check the engine speed while operating the camshaft timing oil control valve assembly using the tester.

       OK
       Tester Operation Specified Condition OFF Normal engine speed ON Engine idles roughly or stalls

       Tip:
       

       • 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.

    
    
    • OKClick here
    • NGClick here
39. Click here

    PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE VVT EXHAUST LINEAR)

    
    

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG)

    3. Turn the tester on.

    4. Start the engine and warm it up.

    5. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Exhaust Linear (Bank 1) or Control the VVT Exhaust Linear (Bank 2).

    6. Check the engine speed while operating the camshaft timing oil control valve assembly using the tester.

       OK
       Tester Operation Specified Condition 0% Normal engine speed 100% Engine idles roughly or stalls

       Tip:
       

       • 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.

    
    
    • OKClick here
    • NGClick here
40. Click here

    READ FREEZE FRAME DATA

    
    

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Using the tester, 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 for DTC P1605 Suspected Area Proceed to IGN Advance Knock Correct Learn Value Differs from the current value of the vehicle by 10° or more Below 3° Engine coolant temperature sensor Mass air flow meter sub-assembly Knock sensor A 3° or more - B Differs from the current value of the vehicle by less than 10° - -

       Tip:
       

       • Try to operate 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 the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data.

       • Even if the results are normal, the knock control sensors may have been malfunctioning. If there are no problems with other parts, replace the knock control sensors (refer to step 57).

    
    
    • AClick here
    • BClick here
41. Click here

    INSPECT ENGINE COOLANT TEMPERATURE SENSOR

    Tip:

    For the engine coolant temperature inspection, refer to the following procedures (Click here).

    
    
    • OKClick here
    • NGClick here
42. Click here

    INSPECT MASS AIR FLOW METER SUB-ASSEMBLY

    
    

    1. Inspect the mass air flow meter sub-assembly (Click here).

       Tip:

       If the intake air temperature sent to the ECM is higher than the standard due to the mass air flow meter sub-assembly (intake air temperature sensor) malfunctioning, the ignition timing may become delayed.

    
    
    • OKClick here
    • NGClick here
43. Click here

    CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY POWER SOURCE)

    
    

    1. Disconnect the fuel injector assembly connector.

    2. Turn the ignition switch on (IG).

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

       Standard Voltage
       Tester Connection Switch Condition Specified Condition B13-2 - Body ground Ignition switch on (IG) 11 to 14 V B14-2 - Body ground Ignition switch on (IG) 11 to 14 V B15-2 - Body ground Ignition switch on (IG) 11 to 14 V B16-2 - Body ground Ignition switch on (IG) 11 to 14 V B17-2 - Body ground Ignition switch on (IG) 11 to 14 V B18-2 - Body ground Ignition switch on (IG) 11 to 14 V

       Tip:
       

       • 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.

       • A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)

    4. Reconnect the fuel injector assembly connector.

    
    
    • OKClick here
    • NGClick here
44. Click here

    CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY POWER SOURCE)

    
    

    1. Disconnect the ignition coil assembly connector.

    2. Turn the ignition switch on (IG).

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

       Standard Voltage

       Tester Connection Switch Condition Specified Condition B30-1 (+B) - B30-4 (GND) Ignition switch on (IG) 11 to 14 V B31-1 (+B) - B31-4 (GND) Ignition switch on (IG) 11 to 14 V B32-1 (+B) - B32-4 (GND) Ignition switch on (IG) 11 to 14 V B33-1 (+B) - B33-4 (GND) Ignition switch on (IG) 11 to 14 V B34-1 (+B) - B34-4 (GND) Ignition switch on (IG) 11 to 14 V B35-1 (+B) - B35-4 (GND) Ignition switch on (IG) 11 to 14 V

       Tip:
       

       • 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.

       • A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)

    4. Reconnect the ignition coil assembly connector.

    
    
    • OKClick here
    • NGClick here
45. Click here

    READ FREEZE FRAME DATA

    
    

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

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

       Table 4. Result

       Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
       Idle Spark Advn Ctrl (#1 to #6)	At least one cylinder shows a value of 4° or more	Fuel injector system Ignition coil system	A
       	All cylinders show a value of less than 4°	-	B

    
    
    • AClick here
    • BClick here
46. Click here

    READ FREEZE FRAME DATA

    
    

    1. Change the location of the ignition coil assembly for the cylinder whose Idle Spark Advn Ctrl (#1 to #6) was 4° or more in step 45.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch on (IG).

    4. Turn the tester on.

    5. Enter the following menus: Powertrain / Engine and ECT / Data List / Idle Spark Advn Ctrl (#1 to #6).

       Table 5. Result

       Result	Proceed to
       Same as result in step 45	A
       Different from result in step 45	B

       Tip:

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

    
    
    • AClick here
    • BClick here
47. Click here

    READ FREEZE FRAME DATA

    
    

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Using the tester, 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 for DTC P1605 Suspected Area Proceed to A/C Signal Air Conditioner FB Val A/C Signal display does not change from OFF* - - A A/C Signal display changes from OFF to ON* Value is 0 L/s Value is shown A/C system B

       
       

       • *: Check not only the ON / OFF state of the air conditioner but also the change in air conditioner load.

       Tip:
       

       • Try to operate 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 the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data.

       • The normal value for the ISC learning amount is engine displacement (liters) x 0.9.

       • Even if the results are normal, the A/C system may have been malfunctioning. Continue this inspection procedure until step 49, and if there are no problems with other parts, inspect the A/C system (refer to step 57).

    
    
    • AClick here
    • BClick here
48. Click here

    READ FREEZE FRAME DATA

    
    

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Using the tester, 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 for DTC P1605 Suspected Area Proceed to Electrical Load Signal 1 and 2 Electric Load Feedback Val Difference between Engine Speed and Turbine Speed Vehicle Speed Electrical Load Signal 1 and 2 display changes from OFF to ON*, or Value displayed for Electric Load Feedback Val increases* Value displayed for Electric Load Val changes - - Electrical load signal circuit A Value displayed for Electric Load Val does not change At least 1 of the 5 sets of freeze frame data is below 100 rpm Below 15 km/h (9 mph) A/T system B 15 km/h (9 mph) or more - C All 5 sets of freeze frame data are 100 rpm or more - - C Electrical Load Signal 1 and 2 display does not change from OFF, or Value displayed for Electric Load Feedback Val does not increase - At least 1 of the 5 sets of freeze frame data is below 100 rpm Below 15 km/h (9 mph) A/T system B 15 km/h (9 mph) or more - C All 5 sets of freeze frame data are 100 rpm or more - - C

       
       

       • *: If the Electrical Load Signal display changes from OFF to ON or the "Electric Load Feedback Val" increases, it probably is a malfunction due to a change in electrical load. Check the generator and the continuity and connections between the generator and ECM.

       Tip:
       

       • The normal value for the ISC learning amount is engine displacement (liters) x 0.9.

       • Even if the results are normal, the electrical load signal system and/or the A/T system may have been malfunctioning. Continue this inspection procedure until step 49, and if there are no problems with other parts, inspect the electrical load system and/or the A/T system (refer to step 57).

    
    
    • AClick here
    • BClick here
    • CClick here
49. Click here

    READ FREEZE FRAME DATA

    
    

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Using the tester, 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 for DTC P1605 Suspected Area Proceed to Shift SW Status (P Range) or Shift SW Status (N Range) Neutral Position SW Signal Shift SW Status (P Range) and Shift SW Status (N Range) are both OFF in at least one data set In D or R, Neutral Position SW Signal is ON Park/neutral position switch A In D or R, Neutral Position SW Signal is OFF A/T system B All 5 sets of freeze frame data are ON - - C

       Tip:

       Even if the results are normal, the park/neutral position switch and/or A/T system may have been malfunctioning. If there are no problems with other parts, inspect the park/neutral position switch and/or A/T system (refer to step 57).

    
    
    • AClick here
    • BClick here
    • CClick here
50. Click here

    READ FREEZE FRAME DATA

    
    

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Using the tester, 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 for DTC P1605 Result Suspected Area Proceed to Throttle Sensor Position, Calculate Load Calculate Load decreases while Throttle Sensor Position increases Mass air flow meter sub-assembly A Calculate Load does not decrease while Throttle Sensor Position increases - B

    
    
    • AClick here
    • BClick here
51. Click here

    CHECK MASS AIR FLOW METER SUB-ASSEMBLY

    
    

    1. Remove the mass air flow meter sub-assembly.

    2. Check for foreign matter in the air flow passage of the mass air flow meter sub-assembly.

       Result
       Result Proceed to Visible foreign matter is present A Visible foreign matter is not present B

    3. Install the mass air flow meter sub-assembly.

       Tip:

       Even if the results are normal, the mass air flow meter sub-assembly may have been malfunctioning. Continue this inspection procedure until step 56, and if there are no problems with other parts, replace the mass air flow meter sub-assembly (refer to step 57).

    
    
    • AClick here
    • BClick here
52. Click here

    CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY POWER SOURCE)

    
    

    1. Disconnect the fuel injector assembly connector.

    2. Turn the ignition switch on (IG).

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

       Standard Voltage
       Tester Connection Switch Condition Specified Condition B13-2 - Body ground Ignition switch on (IG) 11 to 14 V B14-2 - Body ground Ignition switch on (IG) 11 to 14 V B15-2 - Body ground Ignition switch on (IG) 11 to 14 V B16-2 - Body ground Ignition switch on (IG) 11 to 14 V B17-2 - Body ground Ignition switch on (IG) 11 to 14 V B18-2 - Body ground Ignition switch on (IG) 11 to 14 V

       Tip:
       

       • 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.

       • A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)

    4. Reconnect the fuel injector assembly connector.

    
    
    • OKClick here
    • NGClick here
53. Click here

    CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY POWER SOURCE)

    
    

    1. Disconnect the ignition coil assembly connector.

    2. Turn the ignition switch on (IG).

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

       Standard Voltage

       Tester Connection Switch Condition Specified Condition B30-1 (+B) - B30-4 (GND) Ignition switch on (IG) 11 to 14 V B31-1 (+B) - B31-4 (GND) Ignition switch on (IG) 11 to 14 V B32-1 (+B) - B32-4 (GND) Ignition switch on (IG) 11 to 14 V B33-1 (+B) - B33-4 (GND) Ignition switch on (IG) 11 to 14 V B34-1 (+B) - B34-4 (GND) Ignition switch on (IG) 11 to 14 V B35-1 (+B) - B35-4 (GND) Ignition switch on (IG) 11 to 14 V

       Tip:
       

       • 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.

       • A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)

    4. Reconnect the ignition coil assembly connector.

    
    
    • OKClick here
    • NGClick here
54. Click here

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

    
    

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Turn the tester on.

    4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.

    5. Check whether the fuel pump operating sound occurs when performing the Active Test on the tester.

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

       Result
       Result Proceed to NG A OK B

       Tip:
       

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

       • While performing the Active Test, make sure that there is no fuel leakage from the pipes, no signs that fuel has leaked, and no fuel smell.

       • If the fuel pump operating noise is abnormal, proceed to step 55.

    
    
    • AClick here
    • BClick here
55. Click here

    INSPECT FUEL PUMP

    
    
    1. 

       Disconnect the fuel pump connector.

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

       Standard Resistance
       Tester Connection Condition Reference Value 4 - 5 20°C (68°F) 0.2 to 3.0 Ω

       Table 6. Text in Illustration

       *a	Component without harness connected (Fuel Pump)

    3. Reconnect the fuel pump connector.

    
    
    • OKClick here
    • NGClick here
56. Click here

    CHECK FUEL SYSTEM

    
    

    1. 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

    
    
    • AClick here
    • BClick here
57. Click here

    REPLACE MALFUNCTIONING PARTS

    
    

    1. If the malfunction could not be identified in steps 3 to 24, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.

       Performed Step	Inspection or Part to Replace
       Step 6	Brake booster replacement
       Step 8	Mass air flow meter sub-assembly replacement
       Step 9	Air fuel ratio sensor replacement
       Step 16	Engine coolant temperature sensor replacement
       Step 18	Purge VSV replacement
       Step 24	Fuel pump replacement

    2. If the malfunction could not be identified in steps 25 to 34, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.

       Performed Step	Inspection or Part to Replace
       Step 26	Mass air flow meter sub-assembly replacement
       Step 27	Air fuel ratio sensor replacement
       Step 34	Engine coolant temperature sensor replacement

    3. If the malfunction could not be identified in steps 35 to 42, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.

       Performed Step	Inspection or Part to Replace
       Step 36, 37	Throttle with motor body assembly replacement
       Step 40	Knock sensor replacement

    4. If the malfunction could not be identified in steps 43 to 49, inspect and repair the part which is suspected to be malfunctioning according to the step where an inspection was performed.

       Performed Step	Inspection or Part to Replace
       Step 47	A/C system inspection and repair
       Step 48	A/T system inspection and repair Electrical load system inspection and repair
       Step 49	Park/neutral position switch inspection and repair A/T system inspection and repair

    5. If the malfunction could not be identified in steps 50 to 56, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.

       Performed Step	Inspection or Part to Replace
       Step 51	Mass air flow meter sub-assembly replacement

       Tip:

       Referring to the chart, inspect and repair or replace the part from the step where an inspection was performed.

    
    
    • NEXTClick here
58. Click here

    CLEAR DTC

    
    

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Turn the tester on.

    4. Clear the DTCs (Click here).

    
    
    • NEXTClick here
59. Click here

    PERFORM CONFIRMATION DRIVING PATTERN

    
    

    1. Check if engine stall symptoms are present.

       Tip:

       If any engine stall symptoms are present, recheck for DTCs and freeze frame data and perform an inspection.

    
    
    • OKClick here
    • NGClick here
60. Click here

    GO TO DTC CHARTClick here

61. Click here

    REPAIR OR REPLACE AIR INDUCTION SYSTEM

62. Click here

    INSPECT PURGE VSVClick here

63. Click here

    REPLACE BRAKE BOOSTERClick here

64. Click here

    REPLACE MASS AIR FLOW METER SUB-ASSEMBLYClick here

65. Click here

    CHECK AIR FUEL RATIO SENSOR POWER SOURCE CIRCUITClick here

66. Click here

    REPLACE AIR FUEL RATIO SENSORClick here

67. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

68. Click here

    REPLACE THERMOSTATClick here

69. Click here

    REPLACE ENGINE COOLANT TEMPERATURE SENSORClick here

70. Click here

    REPLACE PURGE VSVClick here

71. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (PURGE VSV - EFI RELAY)

72. Click here

    REPLACE ECMClick here

73. Click here

    REPLACE FUEL PUMPClick here

74. Click here

    CHECK FUEL PUMP CONTROL SYSTEMClick here

75. Click here

    REPAIR OR REPLACE FUEL SYSTEM

76. Click here

    REPLACE THROTTLE WITH MOTOR BODY ASSEMBLYClick here

77. Click here

    REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLYClick here

78. Click here

    REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLYClick here

79. Click here

    REPLACE KNOCK SENSORClick here

80. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL INJECTOR ASSEMBLY - IG2 RELAY)

81. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL ASSEMBLY - IG2 RELAY)

82. Click here

    REPLACE IGNITION COIL ASSEMBLYClick here

83. Click here

    CHECK AIR CONDITIONING SYSTEM

84. Click here

    CHECK AUTOMATIC TRANSAXLE SYSTEM

85. Click here

    CHECK GENERATOR CIRCUITClick here

86. Click here

    CHECK PARK/NEUTRAL POSITION SWITCH

87. Click here

    CHECK FUEL PUMP CONTROL SYSTEMClick here

88. Click here

    REPAIR OR REPLACE FUEL SYSTEM

89. Click here

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

90. Click here

    END