TRANSFER SYSTEM, Diagnostic DTC:P17C3

DTC Code DTC Name
P17C3 Rear Differential Lock Limit SW Circuit

DESCRIPTION

When the differential lock shift actuator is switching between free and lock, the RLY1 and RLY2 terminals are in one of the ON/OFF combinations listed in the table below.

Terminal Mode
FREE Switching LOCK
RLY1 ON ON OFF
RLY2 OFF ON ON

A malfunction is detected depending on the combination of the 2 circuits that make up the limit switch of the differential lock shift actuator assembly.

DTC No.

DTC Detection Condition


  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

 Trouble Area
P17C3

  1. When rear differential is switching between free and lock (differential lock shift motor operating) with ignition switch turned to ON

  2. The combination of RLY1 and RLY2 does not match

  3. 0 seconds

  4. 1 trip detection logic

  • Wire harness and connector

  • 4 wheel drive control ECU

  • Differential lock shift actuator

WIRING DIAGRAM

A01X3FYE01
*a Limit Switch
*b Differential Lock Shift Actuator
*c 4 Wheel Drive Control ECU

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU - DIFFERENTIAL LOCK SHIFT ACTUATOR)


    1. Disconnect the A27 4 wheel drive control ECU connector.

    2. Disconnect the f1 differential lock shift actuator connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A27-11 (RLY1) - f1-6 Always Below 1 Ω
      A27-2 (RLY2) - f1-5 Always Below 1 Ω
      f1-4 - Body ground Always Below 1 Ω
      A27-11 (RLY1) or f1-6 - Body ground Always 10 kΩ or higher
      A27-2 (RLY2) or f1-5 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK 4 WHEEL DRIVE CONTROL ECU (ECU OUTPUT VOLTAGE)


    1. Disconnect the f1 differential lock shift actuator connector.

    2. A01X2AXE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Differential Lock Shift Actuator)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      f1-6 - Body ground Ignition switch ON 10 to 14 V
      f1-5 - Body ground Ignition switch ON 10 to 14 V
      Result
      Result Proceed to
      OK A
      NG for LHD B
      for RHD C

    A

    REPLACE DIFFERENTIAL LOCK SHIFT ACTUATOR Click here

    B

    REPLACE 4 WHEEL DRIVE CONTROL ECU Click here

    C

    REPLACE 4 WHEEL DRIVE CONTROL ECU Click here