Toyota Tundra Service Manual: Transfer Shift Motor Control Circuit High (P17AA)

Toyota Tundra Service Manual / Engine, Hybrid System / Wf1am Transfer / Touch Select 2-4 And High-low System / Transfer Shift Motor Control Circuit High (P17AA)

DESCRIPTION

This DTC is detected when a short to B+ is detected in the transfer shift motor drive circuit.

DTC Code

DTC Detection Condition

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

Trouble Area

P17AA
  1. Ignition switch ON (when transfer shift motor is not operating)
  2. Short to B+ in the transfer shift motor drive circuit
  3. 1 second or more
  4. 1 trip detection logic
  • Wire harness and connector
  • 4 wheel drive control ECU
  • Transfer shift actuator assembly

WIRING DIAGRAM

Refer to DTCs P17A8 and P17A9 (See page ).

PROCEDURE

1.

CHECK TRANSFER SHIFT ACTUATOR ASSEMBLY (TRANSFER SHIFT MOTOR)

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

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

A26-1 (TM1) or A26-2 (TM2) - Body ground

Ignition switch ON

Below 1 V
Text in Illustration

*a

Front view of wire harness connector

(to 4 Wheel Drive Control ECU)
OK

REPLACE 4 WHEEL DRIVE CONTROL ECU

NG

2.

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 D67 transfer shift actuator assembly connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

A26-1 (TM1) or D67-1 (TM1) - Body ground

Ignition switch ON

Below 1 V

A26-2 (TM2) or D67-2 (TM2) - Body ground

Ignition switch ON

Below 1 V
OK

REPLACE TRANSFER SHIFT ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
    Transfer Shift Motor Control Circuit Circuit Open (P17A8,P17A9)

    Transfer Shift Motor Position Circuit (P17AB)

    See More:

    Toyota Tundra Service Manual > Can Communication System: Open in Bus 2 Main Bus Line
    DESCRIPTION There may be an open circuit in one of the CAN main bus lines when the resistance between terminals 18 (CA4H) and 17 (CA4L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher. Symptom Trouble Area Resistance between terminals 18 (CA4H) and 17 (CA4L) of the central gatewa ...

    Toyota Tundra Owners Manual

    Toyota Tundra Service Manual

    © 2025 Copyright www.ttundra.com
    0.0104