SFI SYSTEM, Diagnostic DTC:P1603, P1605

DTC Code DTC Name
P1603 Engine Stall History
P1605 Rough Idling

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 run out of fuel before performing troubleshooting, as this DTC is also stored when the engine stalls due to running out of fuel.

DTC No. DTC Detection Condition Trouble Area
P1603

After monitoring for startability problems (P1604) finishes and 5 seconds or more elapse after starting the engine, with the engine running, the engine stops (the engine speed drops to 200 rpm or less) without the ignition switch being operated for 0.5 seconds or more

(1 trip detection logic)

  • Air leak in intake system

  • Purge valve

  • Brake booster hose not connected properly

  • Mass air flow meter

  • Engine coolant temperature sensor

  • Wire harness or connector

  • Air fuel ratio sensor

  • Power supply circuit (purge valve, fuel injector assembly, ignition coil assembly)

  • Fuel pump

  • Fuel pump control system

  • Fuel line

  • Throttle with motor body assembly

  • Camshaft timing oil control valve

  • Air conditioning system

  • Power steering system

  • Electrical load signal system

  • CVT system

  • Park/neutral position switch

  • EGR valve

  • ECM

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.

DTC No. DTC Detection Condition Trouble Area
P1605

After 5 seconds or more elapse after starting the engine, with the engine running, the engine speed drops to 400 rpm or less

(1 trip detection logic)

  • Air leak in intake system

  • Purge valve

  • Brake booster hose not connected properly

  • Mass air flow meter

  • Engine coolant temperature sensor

  • Wire harness or connector

  • Air fuel ratio sensor

  • Power supply circuit (purge valve, fuel injector assembly, ignition coil assembly)

  • Fuel pump

  • Fuel pump control system

  • Fuel line

  • Throttle with motor body assembly

  • Camshaft timing oil control valve

  • Knock sensor

  • Ignition coil assembly

  • Fuel injector assembly

  • Spark plug(s)

  • Air conditioning system

  • Power steering system

  • Electrical load signal system

  • CVT system

  • Park/neutral position switch

  • EGR valve

  • ECM

  1. Reference waveforms showing a normal cold engine start

    A005IXR

  2. Reference waveforms showing a normal warm engine start

    A005GWE

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

    Freeze Frame Data P1605 Rough Idling
    Parameter -3 -2 -1 0 1 Unit
    Engine Speed 606 610 572 346 114 rpm
    Calculate Load 35.6 35.6 36.0 40.7 87.0 %
    Vehicle Load 19.6 19.2 20.3 60.7 120.3 %
    MAF 1.56 1.56 1.56 2.76 1.81 gm/sec
    Atmosphere Pressure 99 99 99 99 99 kPa
    Coolant Temp 85 85 85 85 85 °C
    Intake Air 40 40 40 40 40 °C
    Ambient Temperature 25 25 25 25 25 °C
    Battery Voltage 13.9 13.8 13.8 13.4 13.3 V
    Throttle Sensor Volt % 14.9 14.9 14.9 16.0 15.2 %
    Throttle Sensor #2 Volt % 46.6 46.6 46.6 48.2 47.4 %
    Throttle Sensor Position 0.0 0.0 0.0 0.0 0.0 %
    Throttle Motor DUTY 14.9 14.9 14.9 16.4 15.2 %
    Injector (Port) 2.4 2.4 2.3 2.5 7.4 ms
    Injection Volume (Cylinder 1) 0.070 0.070 0.070 0.070 0.070 ml
    Fuel Pump/Speed Status ON ON ON ON ON
    EVAP (Purge) VSV 0.0 0.0 0.0 0.0 0.0 %
    Evap Purge Flow 0.0 0.0 0.0 0.0 0.0 %
    Purge Density Learn Value 0.000 0.000 0.000 0.000 0.000
    EVAP purge VSV OFF OFF OFF OFF OFF
    Target Air-Fuel Ratio 0.999 0.999 0.999 0.999 0.819
    AF Lambda B1 S1 1.002 1.002 1.001 1.001 1.002
    AFS Voltage B1 S1 3.31 3.31 3.30 3.30 3.31 V
    O2S B1 S2 0.070 0.070 0.070 0.070 0.070 V
    Short FT #1 0.700 0.700 0.700 0.700 0.700 %
    Long FT #1 -1.652 -1.652 -1.652 -1.652 -1.652 %
    Total FT #1 -0.004 -0.004 -0.004 -0.004 -0.004
    Fuel System Status #1 CL CL CL CL OL
    IGN Advance 5.5 4.5 6.5 4.0 4.0 deg
    Knock Feedback Value -3.0 -3.0 -3.0 -3.0 -3.0 CA
    Knock Correct Learn Value 14.0 14.0 14.0 14.0 14.0 CA
    VVT Control Status #1 OFF OFF OFF OFF OFF
    Starter Signal OFF OFF OFF OFF OFF

CAUTION / NOTICE / HINT

Tech Tips


  • In contrast to normal malfunction diagnosis for components, circuit and systems, DTCs P1603 and P1605 are used to determine the malfunctioning area from the problem symptoms and freeze frame data when the user mentions problems such as engine stall.

    As these DTCs can be stored as a result of certain user actions, even if these DTCs are output, if the customer makes no mention of problems, clear these DTCs without performing any troubleshooting and return the vehicle to the customer.

  • If any other DTCs are output, perform troubleshooting for those DTCs first.

  • Use any information from the customer problem analysis about the condition of the vehicle at the time when the problem occurred (how the engine stopped, conditions when the engine was restarted, etc.) as a reference.

    Symptom Suspected Area
    Engine vibration occurs and engine stops Air-fuel ratio abnormal
    Engine stops with no engine vibration Ignition system, injection stoppage, high load from external parts
    Engine can be started with accelerator pedal depressed Insufficient air volume
    Rough idling after engine started Air-fuel ratio abnormal, abnormal combustion

  • Read freeze frame data using the intelligent tester. 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 DTC P1603 (Engine Stall History) is stored, DTC P1605 (Rough Idling) is also stored. When confirming freeze frame data, check DTC P1605. (The ECM stores DTC P1605 first. Therefore, the 5 sets of freeze frame data can be confirmed through DTC P1605, enabling the technician to obtain more information.)

  • When confirming freeze frame data, if there are multiple items related to the cause of the malfunction, perform troubleshooting for all related items.

  • 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.

  • Inspections take into account the fact that the malfunction may not have reoccurred and place emphasis on checking the vehicle conditions present at the time when the malfunction occurred.

  • When performing inspections, jiggle the relevant wire harness and connectors in an attempt to reproduce malfunctions that do not always occur.

Inspection flow
Using freeze frame data, narrow down the parts to be inspected according to the vehicle conditions at the time when the malfunction occurred.

A005GHVE01






P1603 inspection flow: Narrow down the parts to be inspected according to the vehicle conditions at the time when the malfunction occurred (freeze frame data).

Vehicle State Engine Speed Suspected Area Primary Parts to Inspect Procedure
Idling or decelerating Slowly decreases and engine stalls Air-fuel ratio abnormal Air suction

  • Intake system connections

  • Purge valve system

  • Brake booster

 3 to 6
Sensor malfunction (value from sensor too lean)

  • Mass air flow meter

  • Engine coolant temperature sensor

  • Air fuel ratio sensor system

 7 to 16
Sensor malfunction (value from sensor too rich) 25 to 34
Fuel supply problem

  • Fuel pump control system

  • Purge valve system

  • Fuel line

  • ECM

 17 to 24
Intake air volume insufficient ISC flow rate

  • Throttle with motor body assembly (ISC valve)

 35 to 37
Excessive valve overlap

  • Camshaft timing oil control valve

 38
Abnormal combustion

  • EGR valve

 39, 40
Ignition timing incorrect Does not operate as expected

  • Engine coolant temperature sensor

  • Mass air flow meter

 42, 43
Rapidly decreases and engine stalls Ignition and injection stops (electrical system malfunction) Power temporarily cut

  • Power supply circuit (Fuel injector, Ignition coil assembly)

 44, 45
External part malfunctioning Increase in load

  • Air conditioning system

  • Electrical load signal system

  • Power steering system

  • CVT system

  • Neutral start switch system

 48 to 50
Accelerating - Crankshaft position sensor, Camshaft position sensor malfunction Power temporarily cut

  • Check DTCs

 1
Mass air flow meter Foreign matter adhesion

  • Mass air flow meter

 51, 52
Fuel supply problem Fuel leak, clog

  • Fuel pump control system

  • Fuel line

 55 to 57
Ignition and injection stops (electrical system malfunction) Power temporarily cut

  • Power supply circuit (Fuel injector, Ignition coil assembly)

 53, 54

A005IZGE09




P1605 inspection flow: Narrow down the parts to be inspected according to the vehicle conditions at the time when the malfunction occurred (freeze frame data).

Engine Speed Suspected Area Primary Parts to Inspect Procedure
Slowly decreases and engine stalls Air-fuel ratio abnormal Air suction

  • Intake system connections

  • Purge valve system

  • Brake booster

 3 to 6

Sensor malfunction

(value from sensor too lean)

  • Mass air flow meter

  • Engine coolant temperature sensor

  • Air fuel ratio sensor system

 7 to 16

Sensor malfunction

(value from sensor too rich)

 25 to 34
Fuel supply problem

  • Fuel pump control system

  • Purge valve system

  • Fuel line

  • ECM

 17 to 24
Intake air volume insufficient ISC flow rate

  • Throttle with motor body assembly (ISC valve)

 35 to 37
Abnormal combustion

  • EGR valve

 39, 40
Ignition timing incorrect Does not operate as expected

  • Knock sensor

  • Engine coolant temperature sensor

  • Mass air flow meter

 42, 43
Rapidly decreases and engine stalls Ignition and injection stops (electrical system malfunction) Power temporarily cut

  • Power supply circuit (Fuel injector, Ignition coil assembly)

 44, 45
External part malfunctioning Increase in load

  • Air conditioning system

  • Electrical load signal system

  • Power steering system

  • CVT system

  • Neutral start switch system

 48 to 50

Note

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

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION DTC P1603 AND P1605)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. 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

    B

    GO TO DTC CHART Click here

    A

  2. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the intelligent 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 and engine stalls*4 At least one is OFF - -

      • Sensor malfunction

      • Injection stoppage, ignition stoppage

      • Fuel supply problem

      		 E
      A005GZ7E01

      Tech Tips


      • *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 18 km/h (11 mph) or less and the difference between the Engine Speed and SPD (NOUT) is 100 rpm or less, inspect the CVT. (Depending on the rate of vehicle deceleration, the engine speed may have decreased due to the CVT 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.


    B

    READ FREEZE FRAME DATA Click here

    C

    READ FREEZE FRAME DATA Click here

    D

    CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - POWER SOURCE VOLTAGE) Click here

    E

    READ FREEZE FRAME DATA Click here

    A

  3. CHECK INTAKE SYSTEM


    1. Check for air suction in the intake system [vacuum hose disconnection, cracks, 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 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 suction may be present.

      OK
      There is no air suction.

    NG

    REPAIR OR REPLACE INTAKE SYSTEM

    OK

  4. INSPECT PURGE VALVE


    1. A005LY7

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

    2. Start the engine.

    3. Idle the engine.

    4. Disconnect the connector of the purge valve.

    5. Check if air flows through the purge valve.

      OK
      Air does not flow.

    6. Connect the connector of the purge valve.

    7. Connect the purge hose of the purge valve.

      Tech Tips

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


    NG

    INSPECT PURGE VALVE Click here

    OK

  5. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the intelligent 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

    B

    READ FREEZE FRAME DATA Click here

    A

  6. READ VALUE USING INTELLIGENT TESTER (SHORT FT #1)


    1. A005MC4E01

      Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    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.

      Standard
      Short FT #1 changes by +10% or less.
      Result
      Result Proceed to
      OK A
      NG B

      Tech Tips


      • 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 58).

      • 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.


    B

    REPLACE BRAKE BOOSTER ASSEMBLY Click here

    A

  7. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the intelligent 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 A
      AFS Voltage B1S1 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

      Tech Tips


      • 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 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.


    B

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

    C

    READ FREEZE FRAME DATA Click here

    A

  8. INSPECT MASS AIR FLOW METER


    1. Remove the mass air flow meter Click here.

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

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

    3. Install the mass air flow meter Click here.

      Tech Tips


      • Even if the results are normal, the mass air flow meter 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 (refer to step 58).

      • Perform "Inspection After Repairs" after replacing the mass air flow meter Click here.


    A

    REPLACE MASS AIR FLOW METER Click here

    B

    READ FREEZE FRAME DATA Click here

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


    1. Connect the intelligent tester to the DLC3.

      A005H9YE02

    2. Turn the ignition switch to ON.

    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.

    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 (24.8%) Air fuel ratio sensor output voltage is below 3.1 V
      Control the Injection Volume (-12.5%) Air fuel ratio sensor output voltage is higher than 3.4 V
      Result
      Result Proceed to
      Abnormal A
      Normal B

      Tech Tips


      • 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 58).


    B

    READ FREEZE FRAME DATA Click here

    A

  10. CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - BODY GROUND)


    1. A005M3YE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Air Fuel Ratio Sensor)

      Disconnect the air fuel ratio sensor connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B39-2 (+B) - Body ground Ignition switch ON 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.

    4. Reconnect the air fuel sensor connector.


    NG

    CHECK POWER SOURCE CIRCUIT Click here

    OK

  11. 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
      B39-1 (HA1A) - B23-23 (HA1A) Always Below 1 Ω
      B39-3 (A1A+) - B23-133 (A1A+) Always Below 1 Ω
      B39-4 (A1A-) - B23-134 (A1A-) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      B39-1 (HA1A) or B23-23 (HA1A) - Body ground Always 10 kΩ or higher
      B39-3 (A1A+) or B23-133 (A1A+) - Body ground Always 10 kΩ or higher
      B39-4 (A1A-) or B23-134 (A1A-) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      Abnormal A
      Normal B

      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.

    4. Reconnect the ECM connector.

    5. Reconnect the air fuel ratio sensor connector.

      Tech Tips

      Perform "Inspection After Repairs" after replacing the air fuel ratio sensor Click here.


    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    B

    REPLACE AIR FUEL RATIO SENSOR Click here

  12. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the intelligent 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
      Ambient Temperature, Initial Engine Coolant Temp, 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

      Tech Tips


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

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


    B

    READ FREEZE FRAME DATA Click here

    A

  13. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

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

      A005I69E01
      *1 Engine Coolant Temperature Increase after Engine Start (Engine Coolant Temperature - Engine Coolant Temperature at Engine Start)
      *2 (Minutes)
      *3 Time Elapsed after Engine Start
      Result
      Freeze Frame Data Item for DTC P1605 Result Suspected Area Proceed to
      Coolant Temp, Engine Run Time, Initial Engine Coolant Temp Range A

      • Engine coolant temperature sensor

      • Thermostat

      		 A
      Range B Engine coolant temperature sensor B
      Range C - C

      Tech Tips

      This step is not directly related to engine stall.


    B

    INSPECT ENGINE COOLANT TEMPERATURE SENSOR Click here

    C

    READ FREEZE FRAME DATA Click here

    A

  14. INSPECT THERMOSTAT

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

    Result
    Result Proceed to
    Abnormal A
    Normal B

    Tech Tips

    This step is not directly related to engine stall.


    A

    REPLACE THERMOSTAT Click here

    B

    INSPECT ENGINE COOLANT TEMPERATURE SENSOR Click here

  15. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the intelligent 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 Temperature 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

    B

    READ FREEZE FRAME DATA Click here

    A

  16. INSPECT ENGINE COOLANT TEMPERATURE SENSOR

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

    Result
    Result Proceed to
    Abnormal A
    Normal B

    Tech Tips

    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 58).


    A

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    B

  17. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the intelligent 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 0% Purge valve A
      All 5 sets of freeze frame data are 0% - B

      Tech Tips

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


    B

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

    A

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


    1. A005HITE06
      Text in Illustration
      *a VSV is on
      *b VSV is off

      Connect an intelligent tester to the DLC3.

    2. Disconnect the purge valve hose (charcoal canister side) from the purge valve.

    3. Start the engine.

    4. Turn the tester on.

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

    6. When the purge valve is operated using the intelligent tester, check whether the port of the purge valve applies suction to your finger.

      OK
      Tester Operation Specified Condition
      VSV ON Purge valve port applies suction to finger
      VSV OFF Purge valve port applies no suction to finger
      Result
      Result Proceed to
      Abnormal A
      Normal B

      Tech Tips


      • 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 valve may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the purge valve (refer to step 58).

    7. Reconnect the purge valve hose.


    B

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

    A

  19. INSPECT PURGE VALVE


    1. Inspect the purge valve Click here.


    NG

    REPLACE PURGE VALVE Click here

    OK

  20. CHECK HARNESS AND CONNECTOR (POWER SOURCE)


    1. A005I7IE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Purge Valve)

      Disconnect the purge valve connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B61-1 - Body ground Ignition switch ON 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.

    4. Reconnect the purge valve connector.


    NG

    CHECK POWER SOURCE CIRCUIT Click here

    OK

  21. CHECK HARNESS AND CONNECTOR (PURGE VALVE - ECM)


    1. Disconnect the purge valve 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
      B61-2 - B23-76 (PRG) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      B61-2 or B23-76 (PRG) - Body ground Always 10 kΩ or higher

      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.

    4. Reconnect the purge valve connector.

    5. Reconnect the ECM connector.


    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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


    1. Connect an intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    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.

      OK
      Control the Fuel Pump / Speed Specified Condition
      ON Operating sound heard
      OFF Operating sound not head
      Result
      Result Proceed to
      NG A
      OK B

      Tech Tips


      • 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.


    B

    CHECK FUEL SYSTEM Click here

    A

  23. INSPECT FUEL PUMP


    1. Inspect the fuel pump Click here.


    OK

    CHECK FUEL PUMP CONTROL SYSTEM Click here

    NG

    REPLACE FUEL PUMP Click here

  24. 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

      Tech Tips

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


    A

    CHECK FUEL SYSTEM Click here

    B

    REPLACE MALFUNCTIONING PARTS Click here

  25. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the intelligent 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 A
      AFS Voltage B1S1 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

      Tech Tips


      • 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 is malfunctioning and incorrectly measures the intake air volume to be higher than the actual intake air volume, 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.


    B

    PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL INJECTION VOLUME) Click here

    C

    READ FREEZE FRAME DATA Click here

    A

  26. INSPECT MASS AIR FLOW METER


    1. Remove the mass air flow meter.

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

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

      Tech Tips


      • Even if the results are normal, the mass air flow meter 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 (refer to step 58).

      • Perform "Inspection After Repairs" after replacing the mass air flow meter Click here.


    A

    REPLACE MASS AIR FLOW METER Click here

    B

    READ FREEZE FRAME DATA Click here

  27. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL INJECTION VOLUME)


    1. Connect the intelligent tester to the DLC3.

      A005H9YE02

    2. Turn the ignition switch to ON.

    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.

    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 (24.8%) Air fuel ratio sensor output voltage is below 3.1 V
      Control the Injection Volume (-12.5%) Air fuel ratio sensor output voltage is higher than 3.4 V
      Result
      Result Proceed to
      Abnormal A
      Normal B

      Tech Tips


      • 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 58).


    B

    READ FREEZE FRAME DATA Click here

    A

  28. CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - BODY GROUND)


    1. A005M3YE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Air Fuel Ratio Sensor)

      Disconnect the air fuel ratio sensor connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B39-2 (+B) - Body ground Ignition switch ON 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.

    4. Reconnect the air fuel sensor connector.


    NG

    CHECK POWER SOURCE CIRCUIT Click here

    OK

  29. 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
      B39-1 (HA1A) - B23-23 (HA1A) Always Below 1 Ω
      B39-3 (A1A+) - B23-133 (A1A+) Always Below 1 Ω
      B39-4 (A1A-) - B23-134 (A1A-) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      B39-1 (HA1A) or B23-23 (HA1A) - Body ground Always 10 kΩ or higher
      B39-3 (A1A+) or B23-133 (A1A+) - Body ground Always 10 kΩ or higher
      B39-4 (A1A-) or B23-134 (A1A-) - Body ground Always 10 kΩ or higher

      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.

    4. Reconnect the ECM connector.

    5. Reconnect the air fuel ratio sensor connector.

      Tech Tips

      Perform "Inspection After Repairs" after replacing the air fuel ratio sensor Click here.


    OK

    REPLACE AIR FUEL RATIO SENSOR Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  30. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the intelligent 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
      Ambient Temperature, Initial Engine Coolant Temp, 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

      Tech Tips


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

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


    B

    READ FREEZE FRAME DATA Click here

    A

  31. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

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

      A005I69E01
      *1 Engine Coolant Temperature Increase after Engine Start (Engine Coolant Temperature - Engine Coolant Temperature at Engine Start)
      *2 (Minutes)
      *3 Time Elapsed after Engine Start
      Result
      Freeze Frame Data Item for DTC P1605 Result Suspected Area Proceed to
      Coolant Temp, Engine Run Time, Initial Engine Coolant Temp Range A

      • Engine coolant temperature sensor

      • Thermostat

      		 A
      Range B Engine coolant temperature sensor B
      Range C - C

      Tech Tips

      This step is not directly related to engine stall.


    B

    INSPECT ENGINE COOLANT TEMPERATURE SENSOR Click here

    C

    CLEAR DTC Click here

    A

  32. INSPECT THERMOSTAT

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

    Result
    Result Proceed to
    Abnormal A
    Normal B

    Tech Tips

    This step is not directly related to engine stall.


    A

    REPLACE THERMOSTAT Click here

    B

    INSPECT ENGINE COOLANT TEMPERATURE SENSOR Click here

  33. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the intelligent 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 Temperature 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

    B

    CLEAR DTC Click here

    A

  34. INSPECT ENGINE COOLANT TEMPERATURE SENSOR

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

    Result
    Result Proceed to
    Abnormal A
    Normal B

    Tech Tips

    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 58).


    A

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    B

    REPLACE MALFUNCTIONING PARTS Click here

  35. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the intelligent 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

      Tech Tips


      • 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.


    B

    INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY Click here

    C

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

    A

  36. INSPECT 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
      Abnormal A
      Normal B

      Tech Tips


      • Even if the results are normal, the Throttle with motor body assembly may have been malfunctioning. Continue this inspection procedure until step 43, and if there are no problems with other parts, replace the Throttle with motor body assembly (refer to step 58).

      • Perform "Inspection After Repairs" after replacing the throttle with motor body assembly Click here.


    A

    REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY Click here

    B

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

  37. INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY


    1. Check if carbon is in the air flow passage.

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

      Tech Tips


      • Even if the results are normal, the Throttle with motor body assembly may have been malfunctioning. Continue this inspection procedure until step 43, and if there are no problems with other parts, replace the Throttle with motor body assembly (refer to step 58).

      • Perform "Inspection After Repairs" after replacing the throttle with motor body assembly Click here.


    A

    REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY Click here

    B

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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the intelligent tester on.

    3. Warm up the engine.

    4. Turn the tester on.

    5. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT system.

    6. Check the engine speed while operating the Oil Control Valve (OCV) using the intelligent tester.

      OK
      Tester Operation Specified Condition
      OFF Normal engine speed
      ON Soon after OCV switched from OFF to ON, engine idles roughly or stalls

      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.

      • If the camshaft timing oil control valve is stuck ON, the valve overlap increases and combustion worsens due to the internal EGR which may cause rough idle or cause the engine to stall.


    NG

    REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Click here

    OK

  39. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE EGR STEP POSITION)


    1. Check the EGR valve assembly operation.


      1. Connect the intelligent tester to the DLC3.

      2. Turn the ignition switch to ON.

      3. Turn the tester on.

      4. 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.

      5. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position.

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

        OK

        EGR Step Position

        (Active Test)

        		 Specified Condition
        0 Steps Steady idling
        0 to 30 Steps Idling changes from steady to rough idling

        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.

        Result
        Result Proceed to
        Outside of standard range A
        Within standard range B

    B

    READ FREEZE FRAME DATA Click here

    A

  40. INSPECT EGR VALVE ASSEMBLY


    1. Remove the EGR valve assembly Click here.

    2. Check if the EGR valve assembly is stuck open.

      OK
      EGR valve is tightly closed (It is not stuck open).

    3. Reinstall the EGR valve assembly Click here.


    NG

    REPLACE EGR VALVE ASSEMBLY Click here

    OK

  41. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the intelligent 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

      • Knock sensor

      		 A
      3° or more -
      Differs from the current value of the vehicle by less than 10° - - B

      Tech Tips


      • 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 sensor may have been malfunctioning. If there are no problems with other parts, replace the knock sensor (refer to step 58).


    B

    REPLACE MALFUNCTIONING PARTS Click here

    A

  42. INSPECT ENGINE COOLANT TEMPERATURE SENSOR

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


    NG

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    OK

  43. INSPECT MASS AIR FLOW METER


    1. Inspect the mass air flow meter Click here.

      Tech Tips


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

      • Perform "Inspection After Repairs" after replacing the mass air flow meter Click here.


    OK

    REPLACE KNOCK SENSOR Click here

    NG

    REPLACE MASS AIR FLOW METER Click here

  44. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - POWER SOURCE VOLTAGE)


    1. A005GVSE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Fuel Injector Assembly)

      Disconnect the fuel injector assembly connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B5-1 - Body ground Ignition switch ON 11 to 14 V
      B7-1 - Body ground Ignition switch ON 11 to 14 V
      B9-1 - Body ground Ignition switch ON 11 to 14 V
      B11-1 - Body ground Ignition switch ON 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.

      • 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.


    NG

    CHECK FUEL INJECTOR CIRCUIT Click here

    OK

  45. CHECK HARNESS AND CONNECTOR (IGNITION COIL POWER SOURCE VOLTAGE)


    1. A005GKRE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Ignition Coil Assembly)

      Disconnect the ignition coil assembly connectors.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B13-1 (+B) - B13-4 (GND) Ignition switch ON 11 to 14 V
      B15-1 (+B) - B15-4 (GND) Ignition switch ON 11 to 14 V
      B17-1 (+B) - B17-4 (GND) Ignition switch ON 11 to 14 V
      B19-1 (+B) - B19-4 (GND) Ignition switch ON 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.

      • 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 connectors.


    NG

    CHECK POWER SOURCE CIRCUIT Click here

    OK

  46. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the intelligent 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 Result Suspected Area Proceed to
      Idle Spark Advn Ctrl (#1 to #4) 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

    B

    READ FREEZE FRAME DATA Click here

    A

  47. READ FREEZE FRAME DATA


    1. Change the location of the ignition coil for the cylinder whose Idle Spark Advn Ctrl (#1 to #4) was 4° or more in step 46.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the tester on.

    5. Enter the following menus: Powertrain / Engine and ECT / Data List / Idle Spark Advn Ctrl (#1 to #4).

      Result
      Result Proceed to
      Same as result in step 46 A
      Different from result in step 46 B

      Tech Tips

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


    B

    REPLACE IGNITION COIL ASSEMBLY Click here

    A

  48. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the intelligent 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 Power Steering Signal Record
      A/C Signal display changes from OFF to ON*1 Value is shown - A/C system

      A*2

      B*3
      Value is 0 L/s Does not change from OFF - C
      Changes from OFF to ON Power steering system
      A/C Signal display does not change from OFF*1 - Changes from OFF to ON
      Does not change from OFF -

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

      • *2: for Automatic Air Conditioning

      • *3: for Manual Air Conditioning

      Tech Tips


      • 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 ISC learning amount is engine displacement (liters) x 0.9.

      • Even if the results are normal, the power steering system may have been malfunctioning. Continue this inspection procedure until step 52, and if there are no problems with other parts, inspect the power steering system (refer to step 58).


    A

    CHECK AIR CONDITIONING SYSTEM (FOR AUTOMATIC AIR CONDITIONING) Click here

    B

    CHECK AIR CONDITIONING SYSTEM (FOR MANUAL AIR CONDITIONING) Click here

    C

  49. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the intelligent 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, Electrical Load compensation amount Electrical Load compensation amount Difference between Engine Speed and Turbine Speed Vehicle Speed
      Electrical Load Signal display changes from OFF to ON*1, or Value displayed for Electric Load Feedback Val increases*1 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 18 km/h CVT system B
      18 km/h or more - C
      All 5 sets of freeze frame data are 100 rpm or more - - C
      Electrical Load Signal display does not change from OFF, or Value displayed for Electric Load Feed back Val does not increase - At least 1 of the 5 sets of freeze frame data is below 100 rpm Below 18 km/h CVT system B
      18 km/h or more - C
      All 5 sets of freeze frame data are 100 rpm or more - - C

      • *1: 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 ECM.

      Tech Tips


      • 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 CVT system may have been malfunctioning. Continue this inspection procedure until step 50, and if there are no problems with other parts, inspect the electrical load system and/or the CVT system (refer to step 58).


    A

    CHECK GENERATOR CIRCUIT Click here

    B

    CHECK CVT SYSTEM

    C

  50. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the intelligent 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
      P position or N position Park/Neutral position switch
      At least 1 of the 5 sets of freeze frame data is OFF In D or R, NSW is ON Neutral start switch system A
      In D or R, NSW is OFF CVT system B
      All 5 sets of freeze frame data are ON - - C

      Tech Tips

      Even if the results are normal, the neutral start switch system and/or CVT system may have been malfunctioning. If there are no problems with other parts, inspect the neutral start switch system and/or CVT system (refer to step 58).


    A

    INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

    B

    CHECK CVT SYSTEM

    C

    REPLACE MALFUNCTIONING PARTS Click here

  51. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

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

    B

    CHECK HARNESS AND CONNECTOR (FUEL INJECTOR POWER SOURCE VOLTAGE) Click here

    A

  52. INSPECT MASS AIR FLOW METER


    1. Remove the mass air flow meter Click here.

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

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

    3. Install the mass air flow meter Click here.

      Tech Tips


      • Even if the results are normal, the mass air flow meter may have been malfunctioning. Continue this inspection procedure until step 57, and if there are no problems with other parts, replace the mass air flow meter (refer to step 58).

      • Perform "Inspection After Repairs" after replacing the mass air flow meter Click here.


    A

    REPLACE MASS AIR FLOW METER Click here

    B

  53. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR POWER SOURCE VOLTAGE)


    1. A005GVSE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Fuel Injector Assembly)

      Disconnect the fuel injector assembly connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B5-1 - Body ground Ignition switch ON 11 to 14 V
      B7-1 - Body ground Ignition switch ON 11 to 14 V
      B9-1 - Body ground Ignition switch ON 11 to 14 V
      B11-1 - Body ground Ignition switch ON 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.

      • 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.


    NG

    CHECK POWER SOURCE CIRCUIT Click here

    OK

  54. CHECK HARNESS AND CONNECTOR (IGNITION COIL POWER SOURCE VOLTAGE)


    1. A005GKRE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Ignition Coil Assembly)

      Disconnect the ignition coil assembly connectors.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B13-1 (+B) - B13-4 (GND) Ignition switch ON 11 to 14 V
      B15-1 (+B) - B15-4 (GND) Ignition switch ON 11 to 14 V
      B17-1 (+B) - B17-4 (GND) Ignition switch ON 11 to 14 V
      B19-1 (+B) - B19-4 (GND) Ignition switch ON 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.

      • 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 connectors.


    NG

    CHECK POWER SOURCE CIRCUIT Click here

    OK

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


    1. Connect an intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    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.

      OK
      Control the Fuel Pump / Speed Specified Condition
      ON Operating sound heard
      OFF Operating sound not heard
      Result
      Result Proceed to
      NG A
      OK B

      Tech Tips


      • 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 56.


    B

    CHECK FUEL SYSTEM Click here

    A

  56. INSPECT FUEL PUMP


    1. Inspect the fuel pump Click here.


    OK

    CHECK FUEL PUMP CONTROL SYSTEM Click here

    NG

    REPLACE FUEL PUMP Click here

  57. CHECK FUEL SYSTEM


    1. Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter, 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.


    A

    REPAIR OR REPLACE FUEL SYSTEM Click here

    B

  58. 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 replacement
      Step 9 Air fuel ratio sensor replacement
      Step 16 Engine coolant temperature sensor replacement
      Step 18 Purge valve 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 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 43, 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 39, 40 EGR valve assembly replacement
      Step 41 Knock sensor replacement

    4. If the malfunction could not be identified in steps 44 to 50, 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 Repair
      Step 48

      A/C system inspection and repair

      Power steering system inspection and repair
      Step 49

      CVT system inspection and repair

      Electrical load system inspection and repair
      Step 50

      Neutral start switch system inspection and repair

      CVT system inspection and repair

    5. If the malfunction could not be identified in steps 51 to 57, 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 52 Mass air flow meter replacement

      Tech Tips

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


    NEXT

  59. CLEAR DTC


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Clear the DTCs Click here.


    NEXT

  60. PERFORM CONFIRMATION DRIVING PATTERN


    1. Check if engine stall symptoms are present.

      Tech Tips

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


    OK

    END

    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA