C140B

C140B- TRANSFER CASE MOTOR CONTROL CIRCUIT LOW





For a complete wiring diagram refer to Diagrams/Electrical Electrical Diagrams


- When Monitored:

Ignition on. Battery voltage between 9.0 and 16.0 volts.

- Set Condition:

Totally Integrated Power Module (TIPM) detects low voltage on the Transfer Case Motor Control circuit for a period of 0.5 seconds.






Diagnostic Test


1. DTC IS ACTIVE

Ignition on, engine not running.

With the scan tool, read TIPM DTCs.

Is the status Active for this DTC?

Yes

- Go To 2

No

- Go To 9



2. SHIFT MOTOR HARNESS CIRCUIT RESISTANCE





Turn the ignition off to the lock position.

Disconnect the TIPM C4 harness connector.

Measure the resistance between the (T101) Shift Motor Control A circuit and the (T102) Shift Motor Control B circuit.

Is the resistance between 40 and 100 ohms?

Yes

- Go To 8

No

- Go To 3



3. SHIFT MOTOR CIRCUIT RESISTANCE

Disconnect the Shift Motor/Mode Sensor Assembly harness connector.

Measure the resistance between the (T101) Shift Motor Control A circuit and the (T102) Shift Motor Control B circuit at the Shift Motor/Mode Sensor Assembly component side.

Is the resistance between 40 and 100 ohms?

Yes

- Go To 4

No

- Go To 7



4. (T101) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO GROUND





Measure the resistance between ground and the (T101) Shift Motor Control A circuit.

Is the resistance below 5.0 ohms?

Yes

- Repair the (T101) Shift Motor Control A circuit for a short to ground.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1. Verification Tests

No

- Go To 5


5. (T102) SHIFT MOTOR CONTROL B CIRCUIT SHORTED TO GROUND





Measure the resistance between ground and the (T102) Shift Motor Control B circuit.

Is the resistance below 5.0 ohms?

Yes

- Repair the (T102) Shift Motor Control B circuit for a short to ground.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1. Verification Tests

No

- Go To 6



6. (T101) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO (T102) SHIFT MOTOR CONTROL B CIRCUIT





Measure the resistance between (T101) Shift Motor Control A circuit and the (T102) Shift Motor Control B circuit at the at the TIPM C4 harness connector.

Is the resistance below 5.0 ohms?

Yes

- Repair the (T101) Shift Motor Control A circuit for a short to (T102) Shift Motor Control B circuit.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1. Verification Tests

No

- Go To 8



7. SHIFT MOTOR/MODE SENSOR ASSEMBLY

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 Shift Motor/Mode Sensor assembly.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1. Verification Tests



8. 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



9. INTERMITTENT WIRING AND CONNECTORS

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

Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.

While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.

Look for the data to change or for the DTC to reset during the wiggle test.

Were any problems found?

Yes

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

No

- Test complete.