C146F

C146F-TRANSFER CASE MOTOR UNABLE TO REACH 2WD (TIPM)





For a complete wiring diagram Refer to Diagrams/Electrical. Electrical Diagrams


- When Monitored:

The ignition on. T-Case Switch in 2WD position.

- Set Condition:

The TIPM detects that the T-Case will not switch to 2WD.







Diagnostic Test


1. ACTIVE DTC

CAUTION: Before removing the TIPM harness connectors, clean the connector and locking cam area of dirt and debris. Failure to do so can result in the connector being jammed or damage to the locking cams on the harness connector or module. Do not force the assist arm when releasing or installing the harness connector.

Ignition on, engine not running.

With the scan tool, read the TIPM DTCs.

Is the status Active for this DTC?

Yes

- Go To 2

No

- Go To5


2. TRANSFER CASE MOTOR

With the scan tool, monitor the T-Case motor in the next step.

Shift the T-Case switch from 2WD to 4WD several times.

Does the T-Case motor shift correctly?

Yes

- Go To 4

No

- Go To 3


3. TRANSFER CASE SWITCH

Turn the ignition off to the lock position.

Disconnect the T-Case Switch harness connector.

Ignition on, engine not running.

With the scan tool, actuate the T-Case motor.

Does the T-Case motor shift correctly?

Yes

- Replace the Transfer Case Switch.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1. Verification Tests

No

- Replace the Transfer Case Motor.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1. Verification Tests


4. TOTALLY INTEGRATED POWER MODULE (TIPM)

Using the wiring diagram/schematic as a guide, inspect all wiring and connectors that pertain to this circuit.

Were any problems found?

Yes

- Repair as necessary.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1. Verification Tests
No

- Replace the Totally Integrated Power Module (TIPM).
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1. Verification Tests


5. INTERMITTENT WIRING AND CONNECTORS

The conditions necessary to set this DTC are not present at this time.

Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.

Wiggle test the wiring harness and connectors while checking for shorted and open circuits.

Using the scan tool, monitor the data related to this circuit while performing the wiggle test. Look for the data to change or for the DTC to reset.

Were there any problems found?

Yes

- Repair as necessary.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1. Verification Tests

No

- Test Complete.