SFI SYSTEM, Diagnostic DTC:P1603, P1605

DTC Code DTC Name
P1603 Engine Stall History
P1605 Rough Idling

DESCRIPTION

P1603

After starting the engine, this DTC is stored when the engine stops without the engine 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. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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.

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 for 0.5 seconds or more (the engine speed drops to 200 rpm or less) without the engine switch being operated

(1 trip detection logic)

  • Air leak in intake system

  • Purge VSV

  • 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 VSV, fuel injector for port injection and ignition coil assembly)

  • Fuel pump (for low pressure)

  • Fuel pump (for low pressure) control system

  • Fuel line

  • Throttle body assembly

  • Camshaft timing oil control valve

  • VVT-iE system

  • Air conditioning system

  • Electrical load signal system

  • A/T system

  • Park/neutral position switch

  • ECM
P1605

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. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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 VSV

  • 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 VSV, fuel injector for port injection and ignition coil assembly)

  • Fuel pump (for low pressure)

  • Fuel pump (for low pressure) control system

  • Fuel line

  • Throttle body assembly

  • Camshaft timing oil control valve

  • VVT-iE system

  • Knock sensor

  • Ignition coil assembly

  • Fuel injector for port injection

  • Spark plug(s)

  • Air conditioning system

  • Electrical load signal system

  • A/T system

  • Park/neutral position switch

  • ECM

  1. Reference waveforms showing a normal cold engine start

    A015YR2

  2. Reference waveforms showing a normal warm engine start

    A0160WP

  3. Reference waveforms showing an engine stop after normal idling

    A015YRL

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

    Freeze Frame Data P1605 Rough Idling
    Engine
    Current P1605: Rough Idling
    Time Freeze Frame Data
    Item Data1 Data2 Data3 Data4 Data5 Unit
    Engine Speed 775 769 577 359 303 rpm
    Calculate Load 26.6 26.6 29.0 40.3 44.3 %
    Vehicle Load 12.9 12.9 35.6 65.0 16.0 %
    MAF 5.09 5.04 10.28 11.60 2.40 gm/sec
    Atmosphere Pressure 101 101 101 101 101 kPa
    Coolant Temp 93 93 93 93 93 °C
    Intake Air 37 37 37 37 37 °C
    Battery Voltage 13.398 13.398 13.222 12.832 12.792 V
    Throttle Sensor Volt % 16.0 16.0 19.2 20.7 17.6 %
    Throttle Sensor #2 Volt % 47.4 47.4 51.3 52.9 49.8 %
    Throttle Sensor Position 0.0 0.0 0.0 0.0 0.0 %
    Throttle Motor DUTY 16.0 16.0 19.6 20.3 17.6 %
    Injector (Port) 0 0 0 0 0 μs
    Injection Volume (Cylinder 1) 0.101 0.100 0.100 0.100 0.100 ml
    Fuel Pump/Speed Status ON ON ON ON ON
    Injection Time (D4) 1170 1173 1177 2388 2388 μs
    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 -0.617 0.000
    EVAP System Vent Valve OFF OFF OFF OFF OFF
    EVAP purge VSV OFF OFF OFF OFF OFF
    Purge Cut VSV Duty 0.0 0.0 0.0 0.0 0.0 %
    Target Air-Fuel Ratio 0.992 0.992 0.992 0.992 0.992
    AF Lambda B1S1 0.991 0.990 0.991 1.026 1.147
    AF Lambda B2S1 0.995 0.993 0.992 1.014 1.161
    AFS Voltage B1S1 3.273 3.268 3.273 3.488 3.859 V
    AFS Voltage B2S1 3.293 3.278 3.278 3.454 3.956 V
    O2S B1S2 0.115 0.115 0.115 0.115 0.115 V
    O2S B2S2 0.115 0.115 0.115 0.115 0.115 V
    Short FT #1 8.593 8.593 8.593 9.375 9.375 %
    Long FT #1 0.000 0.000 0.000 0.000 0.000 %
    Total FT #1 0.000 0.000 0.000 0.000 0.000
    Sort FT #2 8.593 7.812 8.593 10.937 12.500 %
    Long FT #2 0.000 0.000 0.000 0.000 0.000 %
    Total FT #2 0.000 0.000 0.000 0.000 0.000
    Fuel System Status #1 CL CL CL CL CL
    Fuel System Status #2 CL CL CL CL CL
    IGN Advance 14.0 15.0 18.0 18.0 12.5 deg
    Knock Feedback Value -3.0 -3.0 -3.0 -3.0 -3.0 CA
    Knock Correct Learn Value 15.6 15.6 15.6 15.6 15.6 CA
    Starter Signal Close Close Close Close Close
    Ambient Temp for A/C 26 26 26 26 26 °C

INSPECTION PROCEDURE

Tech Tips


  • In contrast to normal malfunction diagnosis for components, circuits 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. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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 P 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 harnesses 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.
P1603:
A015Z27E01



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 Intake air leak

  • Intake system connections

  • Purge VSV system

  • Brake booster

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

  • Mass air flow meter

  • Engine coolant temperature sensor

  • Thermostat

  • Air fuel ratio sensor system

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

  • Fuel pump (for low pressure) control system

  • Purge VSV system

  • Fuel line

  • ECM

 17 to 24
Intake air volume insufficient ISC flow rate Throttle body assembly (ISC valve) 35 to 37
Excessive valve overlap

  • Camshaft timing oil control valve

  • VVT-iE system

 38, 39
Ignition timing incorrect Does not operate as expected

  • Engine coolant temperature sensor

  • Mass air flow meter

 41, 42
Rapidly decreases and engine stalls Ignition and injection stops (electrical system malfunction) Power temporarily cut Power supply circuit (Fuel injector for port injection and ignition coil assembly) 43 to 46
External part malfunctioning Increase in load

  • Air conditioning system

  • Electrical load signal system

  • A/T system

  • Park/neutral position switch

 47 to 49
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 50, 51
Fuel supply problem Fuel leak, clog

  • Fuel pump (for low pressure) control system

  • Fuel line

 54 to 56
Ignition and injection stops (electrical system malfunction) Power temporarily cut Power supply circuit (Fuel injector for port injection and ignition coil assembly) 52, 53
P1605:
A016052E01


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 Intake air leak

  • Intake system connections

  • Purge VSV system

  • Brake booster

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

  • Mass air flow meter

  • Engine coolant temperature sensor

  • Thermostat

  • Air fuel ratio sensor system

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

  • Fuel pump (for low pressure) control system

  • Purge VSV system

  • Fuel line

  • ECM

 17 to 24
Intake air volume insufficient ISC flow rate Throttle body assembly (ISC valve) 35 to 37
Ignition timing incorrect Does not operate as expected

  • Knock sensor

  • Engine coolant temperature sensor

  • Mass air flow meter

 40 to 42
Rapidly decreases and engine stalls Ignition and injection stops (electrical system malfunction) Power temporarily cut Power supply circuit (Fuel injector for port injector and ignition coil assembly) 43 to 46
External part malfunctioning Increase in load

  • Air conditioning system

  • Electrical load signal system

  • A/T system

  • Park/neutral position switch

 47 to 49

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 TO DTC P1603 AND/OR P1605)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester on.

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

    5. Read the DTCs.

      Result
      Result Proceed to
      DTC P1603 and/or P1605 are output A
      DTC P1603 and/or P1605 and other DTCs 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 engine switch on (IG).

    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, engine stalls*4 At least one is OFF - -

      • Sensor malfunction


      • Injection stoppage, ignition stoppage


      • Fuel supply problem

      		 E
      A01636SE02

      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 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 transmission. (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.


    B

    READ FREEZE FRAME DATA Click here

    C

    READ FREEZE FRAME DATA Click here

    D

    CHECK HARNESS AND CONNECTOR (FUEL INJECTOR FOR PORT INJECTION POWER SOURCE) 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 leakage may be present.

      OK
      There is no air suction.

    NG

    REPAIR OR REPLACE INTAKE SYSTEM

    OK

  4. CHECK PURGE VSV


    1. A0162V3

      Disconnect the purge 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.

      Tech Tips

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


    NG

    INSPECT PURGE VSV Click here

    OK

  5. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine 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

    B

    READ FREEZE FRAME DATA Click here

    A

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

    A015ZYTE03

    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine 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 / Data List / Short FT #1 or Short FT #2.

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

      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 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.


    NG

    REPLACE BRAKE BOOSTER Click here

    OK

  7. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine 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*1 Mass air flow meter 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

      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 P 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 less than the actual intake air volume, the freeze frame data will show a low Calculate 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 FOR A/F SENSOR) Click here

    C

    READ FREEZE FRAME DATA Click here

    A

  8. CHECK 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 57).


    B

    READ FREEZE FRAME DATA Click here

    A

    REPLACE MASS AIR FLOW METER Click here

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


    1. A016091E02

      Connect the intelligent tester to the DLC3.

    2. Turn the engine 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 / 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

      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 57).


    B

    READ FREEZE FRAME DATA Click here

    A

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


    1. Disconnect the air fuel ratio sensor connector.

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E42-2 (+B) - Body ground Engine switch on (IG) 11 to 14 V
      E38-2 (+B) - Body ground Engine switch on (IG) 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 ratio sensor connector.


    NG

    CHECK AIR FUEL RATIO SENSOR 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
      E42-1 (HA1A) - E6-5 (HA1A) Always Below 1 Ω
      E42-3 (A1A+) - E5-23 (A1A+) Always Below 1 Ω
      E42-4 (A1A-) - E5-22 (A1A-) Always Below 1 Ω
      E38-1 (HA2A) - E6-6 (HA2A) Always Below 1 Ω
      E38-3 (A2A+) - E5-21 (A2A+) Always Below 1 Ω
      E38-4 (A2A-) - E5-20 (A2A-) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      E42-1 (HA1A) or E6-5 (HA1A) - Body ground Always 10 kΩ or higher
      E42-3 (A1A+) or E5-23 (A1A+) - Body ground Always 10 kΩ or higher
      E42-4 (A1A-) or E5-22 (A1A-) - Body ground Always 10 kΩ or higher
      E38-1 (HA2A) or E6-6 (HA2A) - Body ground Always 10 kΩ or higher
      E38-3 (A2A+) or E5-21 (A2A+) - Body ground Always 10 kΩ or higher
      E38-4 (A2A-) or E5-20 (A2A-) - 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.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE AIR FUEL RATIO SENSOR Click here

  12. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine 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

      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 engine 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.

      A0160H5E03
      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

      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

    Tech Tips

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

    Result
    Result Proceed to
    NG A
    OK B

    Tech Tips

    This step is not directly related to engine stall.


    B

    INSPECT ENGINE COOLANT TEMPERATURE SENSOR Click here

    A

    REPLACE THERMOSTAT Click here

  15. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine 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

    B

    READ FREEZE FRAME DATA Click here

    A

  16. INSPECT ENGINE COOLANT TEMPERATURE SENSOR

    Tech Tips

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

    Result
    Result Proceed to
    NG A
    OK 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 57).


    B

    READ FREEZE FRAME DATA Click here

    A

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

  17. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine 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

      Tech Tips

      If the purge VSV is stuck closed, air-fuel ratio compensation for the purge VSV 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. A0160PGE02

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

    2. Connect the intelligent tester to the DLC3.

    3. Turn the engine switch on (IG).

    4. Start the engine.

    5. Turn the tester on.

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

    7. When the purge VSV is operated using the tester, check whether the port 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

      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 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).


    B

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

    A

  19. INSPECT PURGE VSV

    A015YSAE01

    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

    3. Reconnect the purge VSV connector.


    NG

    REPLACE PURGE VSV Click here

    OK

  20. CHECK HARNESS AND CONNECTOR (PURGE VSV POWER SOURCE)


    1. Disconnect the purge VSV connector.

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E77-1 - Body ground Engine switch on (IG) 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 VSV connector.


    NG

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

    OK

  21. 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
      E77-1 - E3-17 (PRG) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      E77-1 or E3-17 (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 ECM connector.

    5. Reconnect the purge VSV connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here

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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester on.

    4. Enter the following menus: Powertrain / Engine / 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

      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 (for low pressure) operating noise is abnormal, proceed to step 23.


    B

    CHECK FUEL SYSTEM Click here

    A

  23. INSPECT FUEL PUMP (FOR LOW PRESSURE)


    1. A016186E04

      Disconnect the fuel pump (for low pressure) 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

    3. Reconnect the fuel pump (for low pressure) connector.


    NG

    REPLACE FUEL PUMP (FOR LOW PRESSURE) Click here

    OK

    CHECK FUEL PUMP CONTROL SYSTEM Click here

  24. CHECK FUEL SYSTEM


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

      Result
      Result Proceed to
      There is foreign matter or signs that fuel pump (for low pressure) was stuck A
      There is no foreign matter and no signs that fuel pump (for low pressure) was stuck B

      Tech Tips

      If there is foreign matter such as iron particles on the fuel pump (for low pressure), fuel filter or fuel tank, remove the foreign matter.


    B

    REPLACE MALFUNCTIONING PARTS Click here

    A

    REPAIR OR REPLACE FUEL SYSTEM

  25. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine 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*1 Mass air flow meter 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

      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 P 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 of air flowing through the intake manifold, the freeze frame data will show a high Calculate 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 THE INJECTION VOLUME FOR A/F SENSOR) Click here

    C

    READ FREEZE FRAME DATA Click here

    A

  26. CHECK 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 34, and if there are no problems with other parts, replace the mass air flow meter (refer to step 57).


    B

    READ FREEZE FRAME DATA Click here

    A

    REPLACE MASS AIR FLOW METER Click here

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


    1. A016091E02

      Connect the intelligent tester to the DLC3.

    2. Turn the engine 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 / 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

      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 57).


    B

    READ FREEZE FRAME DATA Click here

    A

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


    1. Disconnect the air fuel ratio sensor connector.

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E42-2 (+B) - Body ground Engine switch on (IG) 11 to 14 V
      E38-2 (+B) - Body ground Engine switch on (IG) 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 ratio sensor connector.


    NG

    CHECK AIR FUEL RATIO SENSOR 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
      E42-1 (HA1A) - E6-5 (HA1A) Always Below 1 Ω
      E42-3 (A1A+) - E5-23 (A1A+) Always Below 1 Ω
      E42-4 (A1A-) - E5-22 (A1A-) Always Below 1 Ω
      E38-1 (HA2A) - E6-6 (HA2A) Always Below 1 Ω
      E38-3 (A2A+) - E5-21 (A2A+) Always Below 1 Ω
      E38-4 (A2A-) - E5-20 (A2A-) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      E42-1 (HA1A) or E6-5 (HA1A) - Body ground Always 10 kΩ or higher
      E42-3 (A1A+) or E5-23 (A1A+) - Body ground Always 10 kΩ or higher
      E42-4 (A1A-) or E5-22 (A1A-) - Body ground Always 10 kΩ or higher
      E38-1 (HA2A) or E6-6 (HA2A) - Body ground Always 10 kΩ or higher
      E38-3 (A2A+) or E5-21 (A2A+) - Body ground Always 10 kΩ or higher
      E38-4 (A2A-) or E5-20 (A2A-) - 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.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE AIR FUEL RATIO SENSOR Click here

  30. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine 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/F, 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 engine 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.

      A0160H5E03
      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

      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

    Tech Tips

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

    Result
    Result Proceed to
    NG A
    OK B

    Tech Tips

    This step is not directly related to engine stall.


    B

    INSPECT ENGINE COOLANT TEMPERATURE SENSOR Click here

    A

    REPLACE THERMOSTAT Click here

  33. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine 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

    B

    CLEAR DTC Click here

    A

  34. INSPECT ENGINE COOLANT TEMPERATURE SENSOR

    Tech Tips

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

    Result
    Result Proceed to
    NG A
    OK 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 57).


    B

    REPLACE MALFUNCTIONING PARTS Click here

    A

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

  35. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine 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*1 Throttle body assembly A
      120% or more of the current value*2 B
      From 80 to 120% of the current value - 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 P or N) and compare these data with the freeze frame data.

      • *1: If the throttle 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 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 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

    CHECK THROTTLE BODY ASSEMBLY Click here

    C

    PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE VVT-IE LINEAR) Click here

    A

  36. CHECK THROTTLE BODY ASSEMBLY


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

      Result
      Result Proceed to
      NG A
      OK B

      Tech Tips

      Even if the results are normal, the throttle 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 body assembly (refer to step 57).


    B

    PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE VVT-IE LINEAR) Click here

    A

    REPLACE THROTTLE BODY ASSEMBLY Click here

  37. CHECK THROTTLE BODY ASSEMBLY


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

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

      Tech Tips

      Even if the results are normal, the throttle 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 body assembly (refer to step 57).


    B

    PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE VVT-IE LINEAR) Click here

    A

    CLEAN OR REPLACE THROTTLE BODY ASSEMBLY Click here

  38. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE VVT-IE LINEAR)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester on.

    4. Start the engine and warm it up.

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

    6. Monitor VVT-iE Aim Angle #1 and VVT Change Angle #1 or VVT-iE Aim Angle #2 and VVT Change Angle #2.

    7. Perform the Active Test operation with the engine speed at 1500 rpm.

      OK
      Active Test Movement Order Difference between "VVT-iE Aim Angle" and "VVT Change Angle"
      0 deg → 10 deg → 40 deg → 10 deg → 0 deg → 10 deg → END Within 5 DegFR

      Tech Tips


      • When viewed from the rear of the engine assembly, bank 1 is on the left side and bank 2 is on the right side.

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


    NG

    CHECK VVT-IE SYSTEM

    OK

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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester on.

    4. Start the engine and warm it up.

    5. Enter the following menus: Powertrain / Engine / 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 using the tester.

      OK
      Tester Operation Specified Condition
      0% Normal engine speed
      100% 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 camshaft timing oil control valve operating noise is abnormal, check the camshaft timing oil control 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

  40. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine 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 by 10° or more Below 3°

      • Engine coolant temperature sensor

      • Mass air flow meter

      • Knock sensor

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

      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 P 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).


    B

    REPLACE MALFUNCTIONING PARTS Click here

    A

  41. INSPECT ENGINE COOLANT TEMPERATURE SENSOR

    Tech Tips

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


    NG

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    OK

  42. 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.


    NG

    REPLACE MASS AIR FLOW METER Click here

    OK

    REPLACE KNOCK SENSOR Click here

  43. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR FOR PORT INJECTION POWER SOURCE)


    1. Disconnect the fuel injector for port injection connector.

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      I9-2 - Body ground Engine switch on (IG) 11 to 14 V
      I10-2 - Body ground Engine switch on (IG) 11 to 14 V
      I11-2 - Body ground Engine switch on (IG) 11 to 14 V
      I12-2 - Body ground Engine switch on (IG) 11 to 14 V
      H9-2 - Body ground Engine switch on (IG) 11 to 14 V
      H10-2 - Body ground Engine switch on (IG) 11 to 14 V
      H11-2 - Body ground Engine switch on (IG) 11 to 14 V
      H12-2 - Body ground Engine switch on (IG) 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 for port injection connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL INJECTOR FOR PORT INJECTION - IG2 RELAY)

    OK

  44. CHECK HARNESS AND CONNECTOR (IGNITION COIL POWER SOURCE)


    1. Disconnect the ignition coil connector.

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E22-1 (+B) - E22-4 (GND) Engine switch on (IG) 11 to 14 V
      E32-1 (+B) - E32-4 (GND) Engine switch on (IG) 11 to 14 V
      E23-1 (+B) - E23-4 (GND) Engine switch on (IG) 11 to 14 V
      E33-1 (+B) - E33-4 (GND) Engine switch on (IG) 11 to 14 V
      E24-1 (+B) - E24-4 (GND) Engine switch on (IG) 11 to 14 V
      E35-1 (+B) - E35-4 (GND) Engine switch on (IG) 11 to 14 V
      E78-1 (+B) - E78-4 (GND) Engine switch on (IG) 11 to 14 V
      E72-1 (+B) - E72-4 (GND) Engine switch on (IG) 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 connector.


    NG

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

    OK

  45. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine 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
      Idle Spark Advn Ctrl (#1 to #8) At least one cylinder shows a value of 4° or more

      • Fuel injector for port injection system

      • Ignition coil system

      		 A
      All cylinders show a value of less than 4° - B

    B

    READ FREEZE FRAME DATA Click here

    A

  46. READ FREEZE FRAME DATA


    1. Change the location of the ignition coil for the cylinder whose Idle Spark Advn Ctrl (#1 to #8) was 4° or more in step 45.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the tester on.

    5. Enter the following menus: Powertrain / Engine / Data List / Idle Spark Advn Ctrl (#1 to #8).

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

    A

  47. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine 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* Value displayed for Air Conditioner FB Val does not increase - A
      A/C Signal display changes from OFF to ON* Value displayed for Air Conditioner FB Val increase A/C system B

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

      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 P 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).


    B

    CHECK AIR CONDITIONING SYSTEM Click here

    A

  48. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine 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 Electric Load Feedback Val Difference between Engine Speed and SPD (NT) Vehicle Speed
      Electrical Load Signal 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 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.

      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 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).


    B

    CHECK AUTOMATIC TRANSMISSION SYSTEM Click here

    C

    READ FREEZE FRAME DATA Click here

    A

    CHECK GENERATOR CIRCUIT Click here

  49. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine 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 With the shift lever in D or R, Neutral Position SW Signal is ON Park/neutral position switch A
      With the shift lever in D or R, Neutral Position SW Signal is OFF A/T system B
      All 5 sets of freeze frame data are ON - - C

      Tech Tips

      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).


    B

    CHECK AUTOMATIC TRANSMISSION SYSTEM Click here

    C

    PERFORM CONFIRMATION DRIVING PATTERN Click here

    A

    INSPECT PARK/NEUTRAL POSITION SWITCH Click here

  50. READ FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine 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 A
      Calculate Load does not decrease while Throttle Sensor Position increases - B

    B

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

    A

  51. CHECK 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 56, and if there are no problems with other parts, replace the mass air flow meter (refer to step 57).


    B

    CHECK HARNESS AND CONNECTOR (FUEL INJECTOR FOR PORT INJECTION POWER SOURCE) Click here

    A

    REPLACE MASS AIR FLOW METER Click here

  52. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR FOR PORT INJECTION POWER SOURCE)


    1. Disconnect the fuel injector for port injection connectors.

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      I9-2 - Body ground Engine switch on (IG) 11 to 14 V
      I10-2 - Body ground Engine switch on (IG) 11 to 14 V
      I11-2 - Body ground Engine switch on (IG) 11 to 14 V
      I12-2 - Body ground Engine switch on (IG) 11 to 14 V
      H9-2 - Body ground Engine switch on (IG) 11 to 14 V
      H10-2 - Body ground Engine switch on (IG) 11 to 14 V
      H11-2 - Body ground Engine switch on (IG) 11 to 14 V
      H12-2 - Body ground Engine switch on (IG) 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 for port injection connectors.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL INJECTOR FOR PORT INJECTION - IG2 RELAY)

    OK

  53. CHECK HARNESS AND CONNECTOR (IGNITION COIL POWER SOURCE)


    1. Disconnect the ignition coil connectors.

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E22-1 (+B) - E22-4 (GND) Engine switch on (IG) 11 to 14 V
      E32-1 (+B) - E32-4 (GND) Engine switch on (IG) 11 to 14 V
      E23-1 (+B) - E23-4 (GND) Engine switch on (IG) 11 to 14 V
      E33-1 (+B) - E33-4 (GND) Engine switch on (IG) 11 to 14 V
      E24-1 (+B) - E24-4 (GND) Engine switch on (IG) 11 to 14 V
      E35-1 (+B) - E35-4 (GND) Engine switch on (IG) 11 to 14 V
      E78-1 (+B) - E78-4 (GND) Engine switch on (IG) 11 to 14 V
      E72-1 (+B) - E72-4 (GND) Engine switch on (IG) 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 connectors.


    NG

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

    OK

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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester on.

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

    5. Check whether the fuel pump (for low pressure) 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

      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 (for low pressure) operating noise is abnormal, proceed to step 55.


    B

    CHECK FUEL SYSTEM Click here

    A

  55. INSPECT FUEL PUMP (FOR LOW PRESSURE)


    1. A016186E04

      Disconnect the fuel pump (for low pressure) 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

    3. Reconnect the fuel pump (for low pressure) connector.


    NG

    REPLACE FUEL PUMP (FOR LOW PRESSURE) Click here

    OK

    CHECK FUEL PUMP CONTROL SYSTEM (FOR LOW PRESSURE) Click here

  56. CHECK FUEL SYSTEM


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

      Result
      Result Proceed to
      There is foreign matter or signs that fuel pump (for low pressure) was stuck A
      There is no foreign matter and no signs that fuel pump (for low pressure) was stuck B

    B

    REPLACE MALFUNCTIONING PARTS Click here

    A

    REPAIR OR REPLACE FUEL SYSTEM (FOR LOW PRESSURE)

  57. 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 VSV replacement
      Step 24 Fuel pump (for low pressure) 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 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 body assembly replacement
      Step 40 Knock control 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 replacement

      Tech Tips

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


    NEXT

  58. CLEAR DTC


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester on.

    4. Clear the DTCs Click here.


    NEXT

  59. 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.


    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

    OK

    END