Toyota Tundra Service Manual: Transfer Synchronization Actuator Circuit High (P17A7)

Toyota Tundra Service Manual / Engine, Hybrid System / Wf1am Transfer / Touch Select 2-4 And High-low System / Transfer Synchronization Actuator Circuit High (P17A7)

DESCRIPTION

This DTC is detected when a short to B+ is detected in the solenoid coil drive circuit.

DTC Code

DTC Detection Condition

Diagnosis Condition
Malfunction Status
Malfunction Time
Other

Trouble Area

P17A7

Ignition switch ON (when not switching between 2WD and 4H)
Short to B+ in the solenoid coil drive circuit
1 second or more
1 trip detection logic

Wire harness and connector
4 wheel drive control ECU
Solenoid coil sub-assembly
Transfer shift actuator assembly

WIRING DIAGRAM

Refer to DTCs P17A5 and P17A6 (See page ).

PROCEDURE

1.	CHECK SOLENOID COIL SUB-ASSEMBLY

(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
A26-6 (SCC) - 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 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.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
A26-6 (SCC) or D67-3 (SCC) - Body ground	Ignition switch ON	Below 1 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	INSPECT SOLENOID COIL SUB-ASSEMBLY

(a) Disconnect the A solenoid coil sub-assembly connector.

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
2 - Body ground	Ignition switch ON	Below 1 V

Text in Illustration

*a	Component without harness connected (Solenoid Coil Sub-assembly)

REPLACE TRANSFER SHIFT ACTUATOR ASSEMBLY

REPLACE SOLENOID COIL SUB-ASSEMBLY

Transfer Synchronization Actuator Circuit Open (P17A5,P17A6)

Transfer Shift Motor Control Circuit Circuit Open (P17A8,P17A9)

See More:

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