DIFFERENTIAL SYSTEM(w/ Differential Lock), Diagnostic DTC:P17BC

DTC Code DTC Name
P17BC Rear Differential Lock Position SW Stuck ON

DESCRIPTION

This DTC is output when an ON malfunction of the rear differential lock position switch (No. 1 transfer indicator switch) is detected.

DTC No. Detection Item DTC Detection Condition Trouble Area
P17BC Rear Differential Lock Position SW Stuck ON

  • Diagnosis Condition: Ignition switch turned to ON

  • Malfunction Status: Rear differential lock position switch (No. 1 transfer indicator switch) is stuck ON

  • Malfunction Time: 2 seconds or more

  • Other: 1 trip detection logic

  • Wire harness and connector

  • 4 wheel drive control ECU

  • Rear differential lock position switch (No. 1 transfer indicator switch)

WIRING DIAGRAM

Refer to DTC P17BB.

Click here

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU - NO. 1 TRANSFER INDICATOR SWITCH)


    1. Disconnect the C39 4 wheel drive control ECU connector.

    2. Disconnect the F2 rear differential lock position switch (No. 1 transfer indicator switch) connector.

    3. w/o VSC:

      Disconnect the A3 skid control ECU (brake actuator assembly) connector.

      w/ VSC:

      Disconnect the A4 skid control ECU (brake actuator assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C39-12 (SLS) or F2-2 (RLY2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT NO. 1 TRANSFER INDICATOR SWITCH


    1. for Automatic Transmission:

      Move the shift lever to N.

      for Manual Transmission:

      Move the shift lever to neutral.

    2. except Pre-Runner:

      Switch the transfer position switch to L4.

    3. Lift up the vehicle until all four wheels are off the ground.

    4. Release the parking brake.

    5. Rotate one rear wheel and set the rear differential to the free condition.

    6. Disconnect the F2 rear differential lock position switch (No. 1 transfer indicator switch) connector.

    7. B00283EC02
      *a

      Component without harness connected

      (Rear Differential Lock Position Switch (No. 1 Transfer Indicator Switch))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 (RLY2) - 1 (GND) Rear differential free 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE 4 WHEEL DRIVE CONTROL ECU Click here

    NG

    REPLACE NO.1 TRANSFER INDICATOR SWITCH Click here