Toyota Tundra Service Manual: Transfer Synchronization Actuator Circuit Open (P17A5,P17A6)

Toyota Tundra Service Manual / Engine, Hybrid System / Wf1am Transfer / Touch Select 2-4 And High-low System / Transfer Synchronization Actuator Circuit Open (P17A5,P17A6)

DESCRIPTION

This DTC is detected when an open circuit or short to ground is detected in the solenoid coil drive circuit.

DTC Code

DTC Detection Condition

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

Trouble Area

P17A5

  1. Ignition switch ON (when not switching between 2WD and 4H)
  2. Open circuit in the solenoid coil drive circuit
  3. 1 second or more
  4. 1 trip detection logic
  • Wire harness and connector
  • 4 wheel drive control ECU
  • Solenoid coil sub-assembly
  • Transfer shift actuator assembly

P17A6

  1. Ignition switch ON (when switching between 2WD and 4H)
  2. Short to ground in the solenoid coil drive circuit
  3. 0.1 seconds or more
  4. 1 trip detection logic
  • Wire harness and connector
  • 4 wheel drive control ECU
  • Solenoid coil sub-assembly
  • Transfer shift actuator assembly

WIRING DIAGRAM

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 D67 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

A26-6 (SCC) - D67-3 (SCC)

Always

Below 1 Ω

A26-6 (SCC) or D67-3 (SCC) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

INSPECT TRANSFER SHIFT ACTUATOR ASSEMBLY (SCC TERMINAL)

(a) Disconnect the D67 transfer shift actuator assembly connector.

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

Standard Resistance:

DTC P17A5 is output

Tester Connection

Condition

Specified Condition

3 (SCC) - Body ground

Always

Below 5 Ω

DTC P17A6 is output

Tester Connection

Condition

Specified Condition

3 (SCC) - Body ground

Always

1 Ω or higher

Text in Illustration

*a

Component without harness connected

(Transfer Shift Actuator Assembly)

OK

REPLACE 4 WHEEL DRIVE CONTROL ECU

NG

3.

INSPECT SOLENOID COIL SUB-ASSEMBLY

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

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

Standard Resistance:

DTC P17A5 is output

Tester Connection

Condition

Specified Condition

2 - Body ground

Always

Below 5 Ω

DTC P17A6 is output

Tester Connection

Condition

Specified Condition

2 - Body ground

Always

1 Ω or higher

Text in Illustration

*a

Component without harness connected

(Solenoid Coil Sub-assembly)

OK

REPLACE TRANSFER SHIFT ACTUATOR ASSEMBLY

NG

REPLACE SOLENOID COIL SUB-ASSEMBLY

    Automatic Disconnecting Differential Motor Limit Switch Circuit (P17A4)

    Transfer Synchronization Actuator Circuit High (P17A7)

    See More:

    Toyota Tundra Service Manual > Sfi System: Basic Inspection
    CAUTION / NOTICE / HINT When a malfunction is not confirmed by the DTC check, troubleshooting should be carried out in all circuits considered to be possible causes of the problem. In many cases, by carrying out the basic engine check shown in the following flowchart, the location of the problem can ...

    Toyota Tundra Owners Manual

    Toyota Tundra Service Manual

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