ANTI-LOCK BRAKE SYSTEM, Diagnostic DTC:C1282

DTC Code DTC Name
C1282 Center Differential Lock Position Switch

DESCRIPTION

DTC C1282 is stored only in test mode.

DTC Code DTC Detection Condition Trouble Area
C1282 Stored during test mode.

  • Harness or connector

  • Transfer system

  • Skid control ECU (Brake actuator assembly)

WIRING DIAGRAM

B001EETE13
*a Center Differential Lock Detection Switch (Transfer Shift Actuator Assembly)
*b Skid Control ECU (Brake Actuator Assembly)
*c 4 Wheel Drive Control ECU
*d Transfer Position Switch

CAUTION / NOTICE / HINT

Note

When replacing the skid control ECU (brake actuator assembly), perform calibration Click here.

PROCEDURE


  1. INSPECT CENTER DIFFERENTIAL LOCK SHIFT


    1. Check that the center differential can shift from free to lock, and from lock to free.

      OK
      The center differential can shift from free to lock, and from lock to free.

    NG

    CHECK TERMINAL VOLTAGE (EXI4) Click here

    OK

  2. CHECK TEST MODE DTC


    1. Switch the vehicle to test mode, perform the center differential lock signal check, and then check that DTC C1282 is cleared Click here.

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

    A

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    B

    USE SIMULATION METHOD TO CHECK Click here

  3. CHECK TERMINAL VOLTAGE (EXI4)


    1. Set the vehicle in the center differential locked state using the center differential lock switch.

    2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

    3. Turn the ignition switch to ON.

    4. B001FOFE04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A6-9 (EXI4) - Body ground Center differential locked (Center differential lock switch on) Below 1.5 V

    5. Connect the A6 skid control ECU (brake actuator assembly) connector.

    6. Set the vehicle in the center differential free state using the center differential lock switch.

    7. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

    8. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A6-9 (EXI4) - Body ground Center differential free (Center differential lock switch off) 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - 4 WHEEL DRIVE CONTROL ECU/TRANSFER SHIFT ACTUATOR ASSEMBLY) Click here

    OK

  4. CHECK TEST MODE DTC


    1. Switch the vehicle to test mode, perform the center differential lock signal check, and then check that DTC C1282 is cleared Click here.

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

    A

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    B

    USE SIMULATION METHOD TO CHECK Click here

  5. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - 4 WHEEL DRIVE CONTROL ECU/TRANSFER SHIFT ACTUATOR ASSEMBLY)


    1. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

    2. Disconnect the G53 4 wheel drive control ECU connector.

    3. Disconnect the C43 transfer shift actuator assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A6-9 (EXI4) - G53-3 (P1) Always Below 1 Ω
      A6-9 (EXI4) - C43-9 (CDL) Always Below 1 Ω
      A6-9 (EXI4) - Body ground Always 10 kΩ or higher

    OK

    GO TO TRANSFER SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR