Toyota Tundra Service Manual: Transfer Shift Motor Limit Switch Circuit (P17AC)

DESCRIPTION

This DTC is detected when a malfunction 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

P17AC

  1. When the ignition switch is ON, the engine is running, and the driving mode is being switched
  2. The combination of the TL1, TL2, TL3 and TL4 terminal signals is abnormal or the TL1, TL2, TL3 and TL4 terminal signal switching order is abnormal
  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

Refer to DTC P17AB (See page ).

PROCEDURE

1.

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

(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) - D68-1 (TL1)

Always

Below 1 Ω

A26-20 (TL2) - D68-2 (TL2)

Always

Below 1 Ω

A26-26 (TL3) - D68-3 (TL3)

Always

Below 1 Ω

A26-24 (TL4) - D68-4 (TL4)

Always

Below 1 Ω

A26-22 (GTL) - D68-5 (GTL)

Always

Below 1 Ω

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

A26-18 (TL1) - D68-2 (TL2), D68-3 (TL3), D68-4 (TL4) and D68-5 (GTL)

Always

10 kΩ or higher

A26-20 (TL2) - D68-1 (TL1), D68-3 (TL3), D68-4 (TL4) and D68-5 (GTL)

Always

10 kΩ or higher

A26-26 (TL3) - D68-1 (TL1), D68-2 (TL2), D68-4 (TL4) and D68-5 (GTL)

Always

10 kΩ or higher

A26-24 (TL4) - D68-1 (TL1), D68-2 (TL2), D68-3 (TL3) and D68-5 (GTL)

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

CHECK 4 WHEEL DRIVE CONTROL ECU (ECU OUTPUT VOLTAGE)

(a) Disconnect the transfer shift actuator assembly connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

D68-1 (TL1) - Body ground

Ignition switch ON

4 to 6 V

D68-2 (TL2) - Body ground

Ignition switch ON

4 to 6 V

D68-3 (TL3) - Body ground

Ignition switch ON

4 to 6 V

D68-4 (TL4) - Body ground

Ignition switch ON

4 to 6 V

Text in Illustration

*a

Front view of wire harness connector

(to Transfer Shift Actuator Assembly)

OK

REPLACE TRANSFER SHIFT ACTUATOR ASSEMBLY

NG

REPLACE 4 WHEEL DRIVE CONTROL ECU

    Transfer Shift Motor Position Circuit (P17AB)

    Four Wheel Drive (4WD) Range Signal Circuit Range / Performance (P279E)

    See More:

    Toyota Tundra Service Manual > Sfi System: Internal Control Module EEPROM Error (P062F)
    DESCRIPTION The ECM monitors its internal operation and it stores this DTC when it detects an internal malfunction. DTC No. DTC Detection Condition Trouble Area P062F An ECM internal error (EEPROM). (1 trip detection logic) ECM MONITOR DESCRIPTION The ECM monitors its internal operation. If the inte ...

    Toyota Tundra Owners Manual

    Toyota Tundra Service Manual

    © 2021 Copyright www.ttundra.com
    0.0316