Toyota Tundra Service Manual: Transfer Shift Motor Position Circuit (P17AB)

DESCRIPTION

This DTC is detected when a short to ground is detected in the limit switch circuit, which detects the position of the transfer shift motor.

DTC Code

DTC Detection Condition

  1. Diagnosis Condition
  2. Malfunction Status
  3. Malfunction Time
  4. Other

Trouble Area

P17AB

  1. Immediately after turning the ignition switch to ON and driving mode is being switched
  2. Short to ground in either the TL1, TL2, TL3, TL4 or GTL terminal circuit
  3. 0.02 seconds or more
  4. 1 trip detection logic
  • Wire harness and connector
  • 4 wheel drive control ECU
  • Transfer shift actuator assembly

WIRING DIAGRAM

PROCEDURE

1.

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

(a) Disconnect the A26 4 wheel drive control ECU connector.

(b) Disconnect the D68 transfer shift actuator assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A26-18 (TL1) or D68-1 (TL1) - Body ground

Always

10 kΩ or higher

A26-20 (TL2) or D68-2 (TL2) - Body ground

Always

10 kΩ or higher

A26-26 (TL3) or D68-3 (TL3) - Body ground

Always

10 kΩ or higher

A26-24 (TL4) or D68-4 (TL4) - Body ground

Always

10 kΩ or higher

A26-22 (GTL) or D68-5 (GTL) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

INSPECT TRANSFER SHIFT ACTUATOR ASSEMBLY (LIMIT SWITCH)

(a) Disconnect the D68 transfer shift actuator assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (TL1) - Body ground

Always

10 kΩ or higher

2 (TL2) - Body ground

Always

10 kΩ or higher

3 (TL3) - Body ground

Always

10 kΩ or higher

4 (TL4) - Body ground

Always

10 kΩ or higher

5 (GTL) - Body ground

Always

10 kΩ or higher

Text in Illustration

*a

Component without harness connected

(Transfer Shift Actuator Assembly)

OK

REPLACE 4 WHEEL DRIVE CONTROL ECU

NG

REPLACE TRANSFER SHIFT ACTUATOR ASSEMBLY

    Transfer Shift Motor Control Circuit High (P17AA)

    Transfer Shift Motor Limit Switch Circuit (P17AC)

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