STOP AND START SYSTEM(for 2AR-FE), Diagnostic DTC:P0C2B15

DTC Code DTC Name
P0C2B15 Auxiliary Transmission Fluid Pump Control Module Feedback Signal Circuit Short to Battery or Open

DESCRIPTION

Refer to DTC P0C2B11.

Click here

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory Note
P0C2B15 Auxiliary Transmission Fluid Pump Control Module Feedback Signal Circuit Short to Battery or Open

Both of the following conditions are met for 1 second or more (2 trip detection logic):


  • Engine started

  • Oil pump with motor assembly circuit malfunction (Oil pump motor relay in the engine stop and start ECU stuck off, open or short to ground in the OP21, OPM1 or NOPM circuit or an open in the GND circuit)

  • Wire harness or connector

  • Oil pump with motor assembly

  • Engine stop and start ECU

 Blinks DTC stored SAE Code: P0C2E

CONFIRMATION DRIVING PATTERN


  1. Tech Tips


    • If the cable is disconnected from the battery terminal, stop and start control is prohibited until refresh charge is completed.

      In this case, let the vehicle idle to complete the refresh charge. The refresh charge is complete when the Data List item [Status of Battery Charge Control] changes from "Refresh Charge Mode". (Usually, idling the engine for 5 to 60 minutes with the battery fluid temperature at 11°C (52°F) or higher, the refresh charge will be completed.)

    • If the GTS is not available and the Data List item [Status of Battery Charge Control] cannot be checked, charge the battery by idling the engine for approximately 5 to 60 minutes or driving the vehicle, and then drive the vehicle and check that stop and start control operates.

      If the engine is started with the hood open, the system determines that a jump start has occurred. Therefore, make sure that the hood is closed before starting the engine and driving the vehicle.

    • After the refresh charge completes, turn the engine switch off, wait for at least 30 seconds, and then start the engine again. If the vehicle enters refresh charge mode again while the engine is idling, the initial refresh charge did not properly complete, so wait for the refresh charge to complete.

    • Allow the engine to idle for 3 minutes after it is warmed up and check that the engine idle speed is within 50 rpm of the target idle speed.

    CONFIRMATION AFTER TROUBLESHOOTING


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch to on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Stop and Start > Clear DTCs

    5. Start the engine and warm it up.

    6. Drive the vehicle at 7 km/h (4.3 mph) or more.

      CAUTION:

      When performing Confirmation Driving Pattern, obey all speed limits and traffic laws.

    7. Depress the brake pedal and stop the vehicle.

    8. Keep the engine stopped by stop and start control. (Keep the shift lever in D.)

    9. Release the brake pedal with the shift lever in D to start the engine.

    10. Check that no DTCs are output.


      Powertrain > Stop and Start > Trouble Codes

  2. Tech Tips


    • If the cable is disconnected from the battery terminal, stop and start control is prohibited until refresh charge is completed.

      In this case, let the vehicle idle to complete the refresh charge. The refresh charge is complete when the Data List item [Status of Battery Charge Control] changes from "Refresh Charge Mode". (Usually, idling the engine for 5 to 60 minutes with the battery fluid temperature at 11°C (52°F) or higher, the refresh charge will be completed.)

    • If the GTS is not available and the Data List item [Status of Battery Charge Control] cannot be checked, charge the battery by idling the engine for approximately 5 to 60 minutes or driving the vehicle, and then drive the vehicle and check that stop and start control operates.

      If the engine is started with the hood open, the system determines that a jump start has occurred. Therefore, make sure that the hood is closed before starting the engine and driving the vehicle.

    • After the refresh charge completes, turn the engine switch off, wait for at least 30 seconds, and then start the engine again. If the vehicle enters refresh charge mode again while the engine is idling, the initial refresh charge did not properly complete, so wait for the refresh charge to complete.

    STOP AND START SYSTEM OPERATION CHECK


    1. Start the engine and warm it up.

    2. Turn the air conditioning system off.

    3. Drive the vehicle at 7 km/h (4.3 mph) or more.

      CAUTION:

      When performing Confirmation Driving Pattern, obey all speed limits and traffic laws.

    4. Depress the brake pedal and stop the vehicle.

    5. Allow the engine to stop by stop and start control. (Keep the shift lever in D.)

    6. Release the brake pedal with the shift lever in D to start the engine.

WIRING DIAGRAM

Refer to DTC P0C2B11.

Click here

CAUTION / NOTICE / HINT

Note


  • When replacing the engine stop and start ECU with a new one, make sure to download the previous status (number of starter operations) of the old engine stop and start ECU. After replacing the engine stop and start ECU, turn the engine switch on (IG) and wait 20 seconds, then confirm that "OK" is displayed for the Data List item [Stop&Start Operating Permission (Discharged Oil Pump Air)]. Then upload the previous status (number of starter operations) to the engine stop and start ECU.

    Click here

  • After replacing the engine stop and start ECU or air conditioning amplifier assembly, reset and perform learning of the air conditioning information in the engine stop and start ECU.

    Click here

  • After replacing the engine stop and start ECU or airbag ECU assembly, clear and calibrate the deceleration sensor zero point in the engine stop and start ECU.

    Click here

  • After replacing the engine stop and start ECU, perform learning of the external backup boost converter (eco run vehicle converter assembly).

    Click here

Tech Tips


  • Using the GTS, read the freeze frame data before troubleshooting. System condition information is recorded as freeze frame data the moment a DTC is stored. This information can be useful when troubleshooting.

    Click here

  • DTCs for the stop and start system are not cleared even if the malfunction has been repaired. After repairing the malfunction, be sure to clear the DTCs.

    Click here

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS (OIL PUMP)


    1. Drive the vehicle to warm up the engine and continuously variable transaxle assembly.

      Tech Tips

      The oil pump with motor assembly may not operate properly if the CVT fluid temperature is low. Make sure to warm up the continuously variable transaxle fluid before performing the Active Test. (CVT fluid temperature: 25°C (77°F) or higher)

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch to on (IG).

      Tech Tips

      Do not start the engine.

    4. Turn the GTS on.

    5. Enter the following menus: Powertrain / Stop and Start / Active Test / Oil Pump.


      Powertrain > Stop and Start > Active Test
      Tester Display
      Oil Pump

    6. Check the operating sound of the oil pump with motor assembly while performing the Active Test.

      Standard
      Oil Pump Result
      ON Operating sound can be heard
      OFF Operating sound cannot be heard
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - OIL PUMP WITH MOTOR ASSEMBLY) Click here

    OK

  2. CHECK ENGINE STOP AND START ECU (NOPM TERMINAL WAVEFORM)


    1. Connect an oscilloscope to terminals NOPM and DGND of the engine stop and start ECU connector.

      B006OEPC02
      *a

      Component with harness connected

      (Engine Stop and Start ECU)

      		 - -

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch to on (IG).

      Tech Tips

      Do not start the engine.

    4. Turn the GTS on.

    5. Enter the following menus: Powertrain / Stop and Start / Active Test / Oil Pump.


      Powertrain > Stop and Start > Active Test
      Tester Display
      Oil Pump
    6. B006NYIE03
      *a 5 V/DIV.
      *b 5 ms./DIV.

      Check the waveform while performing the Active Test.

      Item Condition
      Tester Connection A60-27 (NOPM) - A60-6 (DGND)
      Tool Setting 5 V/DIV., 5 ms./DIV.
      Condition

      • Engine switch on (IG) (engine is stopped)

      • Active Test [Oil Pump] being performed
      Standard
      The waveform is similar to that shown in the illustration with no noise.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ENGINE STOP AND START ECU Click here

    NG

  3. CHECK OIL PUMP WITH MOTOR ASSEMBLY (OPST TERMINAL VOLTAGE)


    1. B006QNEC23
      *a

      Front view of wire harness connector

      (to Oil Pump with Motor Assembly)

      Disconnect the oil pump with motor assembly connector.

    2. Turn the Engine switch to on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      D30-2 (OPST) - D30-1 (GND) Engine switch on (IG) 10 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE OIL PUMP WITH MOTOR ASSEMBLY (CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY) Click here

    NG

  4. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - OIL PUMP WITH MOTOR ASSEMBLY)


    1. Disconnect the engine stop and start ECU connector.

    2. Disconnect the oil pump with motor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A60-27 (NOPM) - D30-2 (OPST) Always Below 1 Ω
      A60-27 (NOPM) or D30-2 (OPST) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ENGINE STOP AND START ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - OIL PUMP WITH MOTOR ASSEMBLY)


    1. Disconnect the engine stop and start ECU connector.

    2. Disconnect the oil pump with motor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A59-6 (OP21) - D30-4 (+B) Always Below 1 Ω
      A59-6 (OP21) or D30-4 (+B) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (OIL PUMP WITH MOTOR ASSEMBLY - BODY GROUND)


    1. Disconnect the oil pump with motor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D30-1 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK ENGINE STOP AND START ECU (OP21 TERMINAL VOLTAGE)

    B006OEPC03
    *a

    Component with harness connected

    (Engine Stop and Start ECU)

    		 - -

    1. Disconnect the oil pump with motor assembly connector.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch to on (IG).

      Tech Tips

      Do not start the engine.

    4. Turn the GTS on.

    5. Enter the following menus: Powertrain / Stop and Start / Active Test / Oil Pump.


      Powertrain > Stop and Start > Active Test
      Tester Display
      Oil Pump

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A59-6 (OP21) - A60-6 (DGND)

      • Engine switch on (IG) (engine is stopped)

      • Active Test [Oil Pump] being performed

      		 10.5 to 16 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ENGINE STOP AND START ECU Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - OIL PUMP WITH MOTOR ASSEMBLY)


    1. Disconnect the engine stop and start ECU connector.

    2. Disconnect the oil pump with motor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A60-9 (OPM1) - D30-3 (SI) Always Below 1 Ω
      A60-9 (OPM1) or D30-3 (SI) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK OIL PUMP WITH MOTOR ASSEMBLY (OPM1 TERMINAL WAVEFORM)


    1. Connect an oscilloscope to the OPM1 and DGND terminals of the engine stop and start ECU connector.

      B006OEPC04
      *a

      Component with harness connected

      (Engine Stop and Start ECU)

      		 - -

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch to on (IG).

      Tech Tips

      Do not start the engine.

    4. Turn the GTS on.

    5. Enter the following menus: Powertrain / Stop and Start / Active Test / Oil Pump.


      Powertrain > Stop and Start > Active Test
      Tester Display
      Oil Pump
    6. B006Q9WE01
      *a 5 V/DIV.
      *b 5 ms./DIV.

      Check the waveform while performing the Active Test.

      Item Condition
      Tester Connection A60-9 (OPM1) - A60-6 (DGND)
      Tool Setting 5 V/DIV., 5 ms./DIV.
      Condition

      • Engine switch on (IG) (engine is stopped)

      • Active Test [Oil Pump] being performed
      Standard
      The waveform is similar to that shown in the illustration with no noise.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ENGINE STOP AND START ECU Click here

    NG

    REPLACE OIL PUMP WITH MOTOR ASSEMBLY (CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY) Click here