ACTIVE STABILIZER SUSPENSION SYSTEM, Diagnostic DTC:C1915, C1920, C193C

DTC Code DTC Name
C1915 Rear PIG Power Supply Voltage
C1920 PIG Wire Harness Malfunction
C193C Front PIG Power Supply Voltage

DESCRIPTION

When the PIG power supply (46 V) of the front active stabilizer control ECU and the rear active stabilizer control ECU is not detected, and an irregular voltage is detected, these DTCs are stored. As the power steering converter supplies power to the power steering system in addition to the front and rear active stabilizer control actuator assemblies, it is possible for the PIG power supply (46 V) to be cut off as a result of a malfunction in the power steering system. During the initial check that occurs immediately after turning the power switch on (READY), the condition of the power steering converter is determined. If there is a malfunction, DTC C1915 or C193C is stored.

DTC No. DTC Detection Condition Trouble Area
C1915

When one of following conditions is met:


  • During initial check immediately after turning power switch on (READY), power steering converter condition check does not complete after 30 seconds have elapsed.

  • After initial check completes normally, PIG voltage of rear active stabilizer control ECU is 36 V or less for 1 minute.

  • After initial check completes normally, PIG voltage of rear active stabilizer control ECU is 52 V or higher for 1 minute.

  • ECU-IG1 NO.1 fuse

  • Power steering system

  • Harness or connector

  • Rear active stabilizer control ECU

  • Front active stabilizer control ECU

  • Power steering converter
C1920

When one of following conditions is met:


  • Open or short in DRSF or DRSR is detected.

  • Open or short in VOT2 is detected.

  • Open or short in WDD3 is detected.
C193C

When one of following conditions is met:


  • During initial check immediately after turning power switch on (READY), power steering converter condition check does not complete after 30 seconds have elapsed.

  • After initial check completes normally, PIG voltage of front active stabilizer control ECU is 36 V or less for 1 minute.

  • After initial check completes normally, PIG voltage of front active stabilizer control ECU is 52 V or higher for 1 minute.

WIRING DIAGRAM

A01NF8YE01

INSPECTION PROCEDURE

Tech Tips

Inspect each fuse in the circuit before troubleshooting.

PROCEDURE


  1. CHECK DTC (POWER STEERING SYSTEM)


    1. Turn the power switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the power switch on (READY) and the intelligent tester on.

    4. Check if any power steering system DTC is output Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    B

    GO TO POWER STEERING SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Click here

    A

  2. CHECK CONNECTOR CONNECTION CONDITION


    1. Turn the power switch off.

    2. Check that the connectors of the rear active stabilizer control ECU, front active stabilizer control ECU and power steering converter are not loose or disconnected.

      OK
      Connectors are not loose or disconnected.

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (FRONT AND REAR ACTIVE STABILIZER CONTROL ECU - POWER STEERING CONVERTER)


    1. Turn the power switch off.

    2. Disconnect the g12 rear ECU connector.

    3. Disconnect the g13 front ECU connector.

    4. Disconnect the F101 and F100 converter connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      g12-4 (PIG) - F100-2 (VOT2) Always Below 1 Ω
      g12-4 (PIG) - Body ground Always 10 kΩ or higher
      g12-5 (PGND) - Body ground Always Below 1 Ω
      g12-6 (MRH) - F101-2 (WDD3) Always Below 1 Ω
      g12-6 (MRH) - Body ground Always 10 kΩ or higher
      g12-11 (MRL) - F101-4 (DRSR) Always Below 1 Ω
      g12-11 (MRL) - Body ground Always 10 kΩ or higher
      g13-4 (PIG) - F100-2 (VOT2) Always Below 1 Ω
      g13-4 (PIG) - Body ground Always 10 kΩ or higher
      g13-5 (PGND) - Body ground Always Below 1 Ω
      g13-11 (MRL) - F101-3 (DRSF) Always Below 1 Ω
      g13-11 (MRL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (IG VOLTAGE)


    1. Turn the power switch off.

    2. Disconnect the g12 rear ECU connector.

    3. Disconnect the g13 front ECU connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      g12-9 (IG) - Body ground Power switch on (IG) 11 to 14 V
      g13-9 (IG) - Body ground Power switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE ACTIVE STABILIZER CONTROL ECU ASSEMBLY


    1. Turn the power switch off.

    2. Replace the active stabilizer control ECU with a new one Click here.


    NEXT

  6. CLEAR DTC


    1. Turn the power switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Clear the DTCs Click here.


    NEXT

  7. CHECK DTC


    1. Turn the power switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the power switch on (READY) and wait 30 seconds or more. Then check for DTCs Click here.

      Result
      Result Proceed to
      DTC is output A
      DTC is not output B

    B

    END

    A

    REPLACE POWER STEERING CONVERTER ASSEMBLY Click here