ELECTRONIC SHIFT LEVER SYSTEM, Diagnostic DTC:P272C73

DTC Code DTC Name
P272C73 Park Pawl Motor Relay System Actuator Stuck Closed

DESCRIPTION

The P CON MTR relay and P CON MTR2 relay are activated by signals output from the shift control ECU and supplies power to the shift control actuator assembly (parking lock motor).

When the shift control ECU detects a malfunction of the P CON MTR relay and P CON MTR2 relay, the DTC is stored in the hybrid vehicle control ECU.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
P272C73 Park Pawl Motor Relay System Actuator Stuck Closed

When the P CON MTR relay and P CON MTR2 relay are both off, voltage at terminal MUA, MVA or MWA of the shift control ECU is 3 V or higher for 0.064 seconds or more.

(1 trip detection logic)

  • Shift control ECU

  • P CON MTR relay

  • P CON MTR2 relay

  • Shift control actuator assembly

  • Wire harness or connector

  • Master Warning Light


    • Comes on

  • Multi-information Display Error Message


    • Displayed

CONFIRMATION DRIVING PATTERN

Tech Tips

After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the All Readiness check procedure.

Click here


  1. Turn the power switch on (IG) and wait for 10 seconds or more.*

    Tech Tips

    *After performing repairs and clearing the DTCs, the P272C73 fail-safe (3-phase motor power source relay OFF) is continued for 1 trip. As a result, P1C8949 may be output. In this case, "Shift system malfunction Apply parking brake securely when parking See owner's manual" is displayed on the multi-information display. Therefore, perform the following procedures and clear P1C8949 after restoring normal control.

  2. Operate the parking brake, turn the power switch off and wait for at least 2 minutes (If the ODO meter is still illuminated after 2 minutes, wait until it turns off).

  3. Turn the power switch on (READY).

    Tech Tips

    If the DTC was cleared during the previous trip, after turning the power switch on (READY) the fail-safe is cleared once normal judgment has been completed.

  4. Depress the brake pedal and move the shift lever to select drive (D).

  5. Drive the vehicle at 40 km/h (25 mph) or more for 10 seconds or more.

    CAUTION:

    Perform this drive pattern on a level surface and strictly observe the posted speed limits and traffic laws while driving.

  6. Stop the vehicle and push the P position switch (shift position indicator) to select park (P).

  7. Check that the DTC P272C73 judgment result shows NORMAL by performing the All Readiness check procedure.

  8. Clear the DTCs.

    Tech Tips

    If P1C8949 is output at this time, it may be due to the fail-safe.

  9. Turn the power switch off and wait for 2 minutes or more (If the ODO meter is still illuminated after 2 minutes, wait until it turns off).

  10. Turn the power switch on (IG) and wait for 10 seconds or more.

  11. Check that there is no DTCs output.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P1C8F14.

Click here

CAUTION / NOTICE / HINT

Note


  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

    Click here

  • The vehicle is equipped with a sub-battery. Therefore, ensure there is no power being supplied to the vehicle when disconnecting or reconnecting the connector of the shift control ECU and when removing or installing the shift control ECU.

    Click here

PROCEDURE


  1. CHECK RELAY VOLTAGE (P CON MTR RELAY)


    1. B004X0AC02
      *1 No. 1 Engine Room Relay Block and Junction Block Assembly
      *2 P CON MTR Relay

      Remove the P CON MTR relay from the No. 1 engine room relay block and junction block assembly.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      P CON MTR relay terminal 5 - Body ground Power switch off Below 1 V

    3. Install the P CON MTR relay.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK SHIFT CONTROL ECU Click here

    OK

  2. CHECK RELAY VOLTAGE (P CON MTR2 RELAY)


    1. B004YIEC02
      *1 No. 2 Luggage Room Relay Block Assembly
      *2 P CON MTR2 Relay

      Remove the P CON MTR2 relay from the No. 2 luggage room relay block assembly.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      P CON MTR2 relay terminal 5 - Body ground Power switch off Below 1 V

    3. Install the P CON MTR2 relay.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK SHIFT CONTROL ECU Click here

    OK

  3. INSPECT P CON MTR RELAY


    1. B004W85C03
      *1 No. 1 Engine Room Relay Block and Junction Block Assembly
      *2 P CON MTR Relay

      Remove the P CON MTR relay from the No. 1 engine room relay block and junction block assembly.

    2. B004SSWC02
      *1 P CON MTR Relay

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher
      Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω

    3. Install the P CON MTR relay.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE P CON MTR RELAY Click here

    OK

  4. INSPECT P CON MTR2 RELAY


    1. B004XNUC02
      *1 No. 2 Luggage Room Relay Block Assembly
      *2 P CON MTR2 Relay

      Remove the P CON MTR2 relay from the No. 2 luggage room relay block assembly.

    2. B004SSWC02
      *1 P CON MTR2 Relay

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher
      Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω

    3. Install the P CON MTR2 relay.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE P CON MTR2 RELAY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (SHIFT CONTROL ECU - P CON MTR RELAY)


    1. Disconnect the A50 shift control ECU connector.

    2. Remove the P CON MTR relay from the No. 1 engine room relay block and junction block assembly.

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

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A50-12(BMA1) or P CON MTR relay terminal 1 - Body ground and other terminals Always 10 kΩ or higher

    4. Install the P CON MTR relay.

    5. Reconnect the A50 shift control ECU connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (SHIFT CONTROL ECU - P CON MTR2 RELAY)


    1. Disconnect the G81 shift control ECU connector.

    2. Remove the P CON MTR2 relay from the No. 2 luggage room relay block assembly.

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

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      G81-24(BMA2) or P CON MTR2 relay terminal 1 - Body ground and other terminals Always 10 kΩ or higher

    4. Install the P CON MTR2 relay.

    5. Reconnect the G81 shift control ECU connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  7. REPLACE SHIFT CONTROL ECU

    Click here

    Result
    Proceed to
    NEXT

    NEXT

  8. CHECK DTC OUTPUT


    1. After repairs have been completed, perform the DTC confirmation driving pattern to run the DTC judgment and check that the DTC judgment result shows NORMAL by performing the All Readiness check procedure (Refer to the CONFIRMATION DRIVING PATTERN for DTC P272C73.).

      Tech Tips

      After performing repairs and clearing the DTCs, the P272C73 fail-safe (3-phase motor power source relay OFF) is continued for 1 trip. As a result, P1C8949 may be output. In this case, "Shift system malfunction Apply parking brake securely when parking See owner's manual" is displayed on the multi-information display. Therefore, turn the power switch off and wait for 2 minutes, then turn the power switch on (IG) and clear P1C8949 after restoring normal control.

      Result
      Proceed to
      NEXT

    NEXT

    END

  9. REPAIR OR REPLACE HARNESS OR CONNECTOR

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 8 Click here

  10. REPAIR OR REPLACE HARNESS OR CONNECTOR

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 8 Click here

  11. REPLACE P CON MTR2 RELAY

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 8 Click here

  12. REPLACE P CON MTR RELAY

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 8 Click here

  13. CHECK SHIFT CONTROL ECU


    1. B004YIEC02
      *1 No. 2 Luggage Room Relay Block Assembly
      *2 P CON MTR2 Relay

      Remove the P CON MTR2 relay from the No. 2 luggage room relay block assembly.

    2. Disconnect the A50 shift control ECU connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      P CON MTR2 relay terminal 5 - Body ground Power switch off Below 1 V

    4. Reconnect the A50 shift control ECU connector.

    5. Install the P CON MTR2 relay.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (SHIFT CONTROL ECU - PARKING LOCK MOTOR (SHIFT CONTROL ACTUATOR ASSEMBLY)) Click here

    OK

  14. REPLACE SHIFT CONTROL ECU

    Click here

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 8 Click here

  15. CHECK HARNESS AND CONNECTOR (SHIFT CONTROL ECU - PARKING LOCK MOTOR (SHIFT CONTROL ACTUATOR ASSEMBLY))


    1. Disconnect the A50 shift control ECU connector.

    2. Disconnect the D31 parking lock motor (shift control actuator assembly) connector.

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

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A50-5(MUA) or D31-2(MUA) - Other terminals Always 10 kΩ or higher
      A50-2(MVA) or D31-6(MVA) - Other terminals Always 10 kΩ or higher
      A50-1(MWA) or D31-1(MWA) - Other terminals Always 10 kΩ or higher

    4. Reconnect the D31 parking lock motor (shift control actuator assembly) connector.

    5. Reconnect the A50 shift control ECU connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  16. CHECK HARNESS AND CONNECTOR (PARKING LOCK MOTOR (SHIFT CONTROL ACTUATOR ASSEMBLY) - P CON MTR RELAY, P CON MTR2 RELAY)


    1. Disconnect the D31 parking lock motor (shift control actuator assembly) connector.

    2. Remove the P CON MTR relay from the No. 1 engine room relay block and junction block assembly.

    3. Remove the P CON MTR2 relay from the No. 2 luggage room relay block assembly.

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

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      P CON MTR relay terminal 5 or D31-7(BMA) - Other terminals (except P CON MTR2 relay terminal 5) Always 10 kΩ or higher
      P CON MTR2 relay terminal 5 or D31-7(BMA) - Other terminals (except P CON MTR relay terminal 5) Always 10 kΩ or higher

    5. Install the P CON MTR relay.

    6. Install the P CON MTR2 relay.

    7. Reconnect the D31 parking lock motor (shift control actuator assembly) connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  17. REPLACE SHIFT CONTROL ACTUATOR ASSEMBLY

    Click here

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 8 Click here

  18. REPAIR OR REPLACE HARNESS OR CONNECTOR

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 8 Click here

  19. REPAIR OR REPLACE HARNESS OR CONNECTOR

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 8 Click here

  20. CHECK SHIFT CONTROL ECU


    1. B004X0AC02
      *1 No. 1 Engine Room Relay Block and Junction Block Assembly
      *2 P CON MTR Relay

      Remove the P CON MTR relay from the No. 1 engine room relay block and junction block assembly.

    2. Disconnect the A50 and G81 shift control ECU connectors.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      P CON MTR relay terminal 5 - Body ground Power switch off Below 1 V

    4. Reconnect the A50 and G81 shift control ECU connectors.

    5. Install the P CON MTR relay.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (SHIFT CONTROL ECU - PARKING LOCK MOTOR (SHIFT CONTROL ACTUATOR ASSEMBLY)) Click here

    OK

  21. REPLACE SHIFT CONTROL ECU

    Click here

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 8 Click here

  22. CHECK HARNESS AND CONNECTOR (SHIFT CONTROL ECU - PARKING LOCK MOTOR (SHIFT CONTROL ACTUATOR ASSEMBLY))


    1. Disconnect the A50 shift control ECU connector.

    2. Disconnect the D31 parking lock motor (shift control actuator assembly) connector.

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

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      A50-5(MUA) or D31-2(MUA) - Other terminals Always 10 kΩ or higher
      A50-2(MVA) or D31-6(MVA) - Other terminals Always 10 kΩ or higher
      A50-1(MWA) or D31-1(MWA) - Other terminals Always 10 kΩ or higher

    4. Reconnect the D31 parking lock motor (shift control actuator assembly) connector.

    5. Reconnect the A50 shift control ECU connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  23. CHECK HARNESS AND CONNECTOR (PARKING LOCK MOTOR (SHIFT CONTROL ACTUATOR ASSEMBLY) - P CON MTR RELAY, P CON MTR2 RELAY)


    1. Disconnect the D31 parking lock motor (shift control actuator assembly) connector.

    2. Remove the P CON MTR relay from the No. 1 engine room relay block and junction block assembly.

    3. Remove the P CON MTR2 relay from the No. 2 luggage room relay block assembly.

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

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      P CON MTR relay terminal 5 or D31-7(BMA) - Other terminals (except P CON MTR2 relay terminal 5) Always 10 kΩ or higher
      P CON MTR2 relay terminal 5 or D31-7(BMA) - Other terminals (except P CON MTR relay terminal 5) Always 10 kΩ or higher

    5. Install the P CON MTR relay.

    6. Install the P CON MTR2 relay.

    7. Reconnect the D31 parking lock motor (shift control actuator assembly) connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  24. REPLACE SHIFT CONTROL ACTUATOR ASSEMBLY

    Click here

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 8 Click here

  25. REPAIR OR REPLACE HARNESS OR CONNECTOR

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 8 Click here

  26. REPAIR OR REPLACE HARNESS OR CONNECTOR

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 8 Click here