ELECTRONIC SHIFT LEVER SYSTEM, Diagnostic DTC:P176D12

DTC Code DTC Name
P176D12 IG2 Signal (Gear Shift Control Module "A") Circuit Short to Auxiliary Battery

DESCRIPTION

The shift control ECU detects that the IG2 signal is stuck ON by comparing it with the IG control status signal sent from the certification ECU (smart key ECU assembly).

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
P176D12 IG2 Signal (Gear Shift Control Module "A") Circuit Short to Auxiliary Battery

8 seconds elapse after turning power switch on (READY) and then turn the power switch off. even when IG control status signal from certification ECU (smart key ECU assembly) is OFF, IG2 signal is ON continuously for 10 seconds or more

(1 trip detection logic)

  • Certification ECU (smart key ECU assembly)

  • Shift Control ECU

  • Wire harness or connector

  • Master Warning Light


    • Comes on

  • Multi-information Display Error Message


    • Displayed

CONFIRMATION DRIVING PATTERN

Tech Tips

After repair has been completed, clear the DTC 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 15 seconds or more.

  2. Turn the power switch off and wait for 2 minutes or more.

WIRING DIAGRAM

Figure 1. for LHD:

B004R3NE03

Figure 2. for RHD:

B004R3NE04

CAUTION / NOTICE / HINT

Note

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.

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PROCEDURE


  1. CHECK CONNECTOR CONNECTION CONDITION (SHIFT CONTROL ECU CONNECTOR)


    1. Check the connector connections and contact pressure of the relevant terminals for the shift control ECU connectors.

      Click here

      B004UMOC02
      *A for LHD *B for RHD
      OK
      The connectors are connected securely and there are no contact pressure problems.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT SECURELY

    OK

  2. CHECK SHIFT CONTROL ECU


    1. Disconnect the G81 shift control ECU connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G81-27 (IG2) - Body ground Power switch off → Power switch on (IG) 1 V or less → 8 V or higher

      Note

      Turning the power switch on (IG) with the connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    3. Turn the power switch off.

    4. Reconnect the G81 shift control ECU connector.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (SHIFT CONTROL ECU - PASSENGER SIDE JUNCTION BLOCK ASSEMBLY (IG2 P RELAY)) Click here

    OK

  3. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.


      Powertrain > Hybrid Control > Trouble Codes

    4. Check for DTCs and freeze frame data and then write them down.

    5. Clear the DTCs.


      Powertrain > Hybrid Control > Clear DTCs

    6. Turn the power switch off.

    7. Disconnect the GTS from the DLC3.

    8. Leave the vehicle as is for 60 seconds or more.

      Note


      • Do not connect the GTS.

      • Do not depress brake pedal.

      • Do not open/close any of the doors.

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK DTC OUTPUT (SIMULATION TEST)


    1. Turn the power switch on (IG) and wait for 15 seconds or more.

    2. Turn the power switch off and wait for 2 minutes or more.

    3. Connect the GTS to the DLC3.

    4. Turn the power switch on (IG).

    5. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.


      Powertrain > Hybrid Control > Trouble Codes

    6. Check if DTCs are output.

      Result
      Result Proceed to
      P176D12 is not output. A
      P176D12 is output. B

    7. Turn the power switch off.


    A

    END

    B

    REPLACE SHIFT CONTROL ECU Click here

  5. CHECK HARNESS AND CONNECTOR (SHIFT CONTROL ECU - PASSENGER SIDE JUNCTION BLOCK ASSEMBLY (IG2 P RELAY))


    1. Disconnect the G81 shift control ECU connector.

    2. Disconnect the 4D passenger side junction block assembly connector.

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

      Standard Resistance (Check for Short)
      for LHD:
      Tester Connection Condition Specified Condition
      G81-27 (IG2) or 4D-29 - Body ground and other terminals Always 10 kΩ or higher
      for RHD:
      Tester Connection Condition Specified Condition
      G81-27 (IG2) or 4D-30 - Body ground and other terminals Always 10 kΩ or higher

    4. Reconnect the 4D passenger side junction block assembly connector.

    5. Reconnect the G81 shift control ECU connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT PASSENGER SIDE JUNCTION BLOCK ASSEMBLY (IG2 P RELAY)


    1. Disconnect the passenger side junction block assembly connectors.

      B004XWWC06
      *1 Passenger Side Junction Block Assembly - -

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

      Standard Resistance (Check for Short)
      for LHD:
      Tester Connection Condition Specified Condition
      4L-1 - 4D-29 Always 10 kΩ or higher
      for RHD:
      Tester Connection Condition Specified Condition
      4L-1 - 4D-30 Always 10 kΩ or higher

    3. Reconnect the passenger side junction block assembly connectors.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE PASSENGER SIDE JUNCTION BLOCK ASSEMBLY Click here

    OK

  7. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. B004WBYC99
      *a

      Component with harness connected

      (Certification ECU (Smart Key ECU Assembly))

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G71-17 (IG1D) - Body ground Power switch off → Power switch on (IG) 1 V or less → 9 V or higher
      Result
      Proceed to
      OK
      NG

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

  8. CHECK HARNESS AND CONNECTOR (PASSENGER SIDE JUNCTION BLOCK ASSEMBLY (IG2 P RELAY) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))


    1. Disconnect the G71 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the 4D passenger side junction block assembly connector.

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

      Standard Resistance (Check for Short)
      for LHD:
      Tester Connection Condition Specified Condition
      G71-17 (IG1D) or 4D-20 - Body ground and other terminals Always 10 kΩ or higher
      for RHD:
      Tester Connection Condition Specified Condition
      G71-17 (IG1D) or 4D-16 - Body ground and other terminals Always 10 kΩ or higher

    4. Reconnect the 4D passenger side junction block assembly connector.

    5. Reconnect the G71 certification ECU (smart key ECU assembly) connector.

      Result
      Proceed to
      OK
      NG

    OK

    CHECK ENTRY AND START SYSTEM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR