TRANSFER SYSTEM, Diagnostic DTC:P17AC

DTC Code DTC Name
P17AC Transfer Shift Motor Limit Switch Circuit

DESCRIPTION

When the transfer shift actuator assembly is switching between high (H4) and low (L4), the HL1, HL2 and HL3 terminals are in one of the ON/OFF combinations listed in the table below.

Terminal Mode
HIGH (H4) Switching LOW (L4)
HL1 ON ON ←→ OFF ←→ OFF OFF
HL2 OFF OFF OFF ON ON
HL3 OFF ON ON ON OFF

A malfunction is detected depending on the combination of the 3 circuits that make up the high-low transfer limit switch.

DTC No.

DTC Detection Condition


  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

 Trouble Area
P17AC

  1. When switching between high and low (high-low transfer shift motor operating) while engine switch turned on (IG) or directly after engine switch is turned on (IG)

  2. The combination of HL1, HL2 and HL3 does not match

  3. 0.05 seconds or more (if directly after engine switch is turned on (IG), 1 second or more)

  4. 1 trip detection logic

  • Wire harness and connector

  • 4 wheel drive control ECU

  • Transfer shift actuator assembly

WIRING DIAGRAM

A01WT5RE13
*a High-low Transfer Limit Switch
*b Transfer Shift Actuator Assembly
*c 4 Wheel Drive Control ECU

PROCEDURE


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


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

    2. Disconnect the C44 transfer shift actuator assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A27-8 (HL1) - C44-4 (HL1) Always Below 1 Ω
      A27-7 (HL2) - C44-6 (HL2) Always Below 1 Ω
      A27-6 (HL3) - C44-5 (HL3) Always Below 1 Ω
      C44-7 (GND) - Body ground Always Below 1 Ω
      A27-8 (HL1) or C44-4 (HL1) - Body ground Always 10 kΩ or higher
      A27-7 (HL2) or C44-6 (HL2) - Body ground Always 10 kΩ or higher
      A27-6 (HL3) or C44-5 (HL3) - 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)

    A01WRG4E02
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Transfer Shift Actuator Assembly)

    1. Disconnect the C44 transfer shift actuator assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C44-4 (HL1) - Body ground Engine switch on (IG) 10 to 14 V
      C44-6 (HL2) - Body ground Engine switch on (IG) 10 to 14 V
      C44-5 (HL3) - Body ground Engine switch on (IG) 10 to 14 V
      Result
      Result Proceed to
      OK A
      NG for LHD B
      for RHD C

    A

    REPLACE TRANSFER SHIFT ACTUATOR ASSEMBLY Click here

    B

    REPLACE 4 WHEEL DRIVE CONTROL ECU Click here

    C

    REPLACE 4 WHEEL DRIVE CONTROL ECU Click here