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

Toyota Tundra Service Manual / Engine, Hybrid System / Wf1am Transfer / Touch Select 2-4 And High-low System / 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

Diagnosis Condition
Malfunction Status
Malfunction Time
Other

Trouble Area

P17A2

Ignition switch ON (when not switching between 2WD and 4H)
Short to B+ in the A.D.D. shift motor drive circui
1 second or more
1 trip detection logic

Wire harness and connector
4 wheel drive control ECU
A.D.D. actuator (differential vacuum actuator assembly)

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

Automatic Disconnecting Differential Motor Control Circuit Open (P17A0,P17A1)

Automatic Disconnecting Differential Motor Limit Switch Circuit (P17A4)

See More:

Toyota Tundra Owners Manual > Driving procedures: Automatic transmission
Shifting the shift lever Floor shift type While the engine switch is in the "ON" position, move the shift lever with the brake pedal depressed. When shifting the shift lever between P and D, make sure that the vehicle is completely stopped. Column shift type While the engine switch is in the "ON" po ...