Toyota Tundra Service Manual: Automatic Disconnecting Differential Motor Control Circuit High (P17A2)

DESCRIPTION

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

DTC Code

DTC Detection Condition

Trouble Area

P17A2

WIRING DIAGRAM

Refer to DTCs P17A0 and P17A1 (See page ).

PROCEDURE

1.	CHECK DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY (A.D.D. 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
A25-1 (DM1) or A25-2 (DM2) - Body ground	Ignition switch ON	Below 1 V

Text in Illustration

*a	Front view of wire harness connector (to 4 Wheel Drive Control ECU)

REPLACE 4 WHEEL DRIVE CONTROL ECU

2.	CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU AND DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY - BODY GROUND)

(a) Disconnect the A25 4 wheel drive control ECU connector.

(b) Disconnect the G1 A.D.D. actuator (differential vacuum actuator assembly) connector.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
A25-1 (DM1) or G1-1 (DM1) - Body ground	Ignition switch ON	Below 1 V
A25-2 (DM2) or G1-2 (DM2) - Body ground	Ignition switch ON	Below 1 V

REPLACE DIFFERENTIAL VACUUM ACTUATOR ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

Toyota Tundra Service Manual > Automatic Transmission System: Pressure Control Solenoid "A" Electrical (Shift Solenoid Valve SL1) (P0748)
DESCRIPTION Shifting from 1st to 6th is performed in combination with the ON and OFF operation of the shift solenoid valves SL1, SL2, S1, S2, S3, S4 and SR, which are controlled by the ECM. If an open or short circuit occurs in the shift solenoid valves, the ECM controls the remaining normal shift s ...

Toyota Tundra Owners Manual