C140D

C140D- TRANSFER CASE MOTOR CONTROL CIRCUIT OPEN





For a complete wiring diagram, refer to the Wiring Information

- When Monitored:
With the ignition on and no system undervoltage or overvoltage condition present.

- Set Condition:
The Final Drive Control Module detects an open circuit on one of the Transfer Case Shift Motor Control circuits.





1. DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, read DTCs.

Is the status Active for this DTC?

Yes

- Go To 2

No

- Go To 7

2. (T315) SHIFT MOTOR CONTROL A CIRCUIT VOLTAGE




1. Turn the ignition off to the lock position
2. Disconnect the Transfer Case Motor harness connector.
3. Ignition on, engine not running.
4. Measure the voltage of the (T315) Shift Motor Control A circuit.

Is the voltage within 1 volt of battery voltage?

Yes

- Go To 3

No

- Go To 4

3. (T316) SHIFT MOTOR CONTROL B CIRCUIT VOLTAGE




1. Measure the voltage of the (T316) Shift Motor Control B circuit.

Is the voltage within 1 volt of battery voltage?

Yes

- Go To 6

No

- Go To 5

4. (T315) SHIFT MOTOR CONTROL A CIRCUIT OPEN




1. Turn the ignition off to the lock position
2. Disconnect the FDCM C1 harness connector.
3. Measure the resistance of the (T315) Shift Motor Control A circuit from the Transfer Case Motor harness connector to the Final Drive Control Module C1 harness connector.

Is the resistance above 5.0 ohms?

Yes

- Repair the (T315) Shift Motor Control A circuit for an open.
- Perform TRANSFER CASE VERIFICATION TEST Transfer Case Verification Test.

No

- Replace the Final Drive Control Module (FDCM).
- Perform TRANSFER CASE VERIFICATION TEST Transfer Case Verification Test.

5. (T316) SHIFT MOTOR CONTROL B CIRCUIT OPEN




1. Turn the ignition off to the lock position
2. Disconnect the FDCM C1 harness connector.
3. Measure the resistance of the (T316) Shift Motor Control B circuit from the Transfer Case Motor harness connector to the Final Drive Control Module C1 harness connector.

Is the resistance above 5.0 ohms?

Yes

- Repair the (T316) Shift Motor Control B circuit for an open.
- Perform TRANSFER CASE VERIFICATION TEST Transfer Case Verification Test.

No

- Replace the Final Drive Control Module (FDCM).
- Perform TRANSFER CASE VERIFICATION TEST Transfer Case Verification Test.

6. TRANSFER CASE MOTOR
1. 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 TRANSFER CASE VERIFICATION TEST Transfer Case Verification Test.

No

- Replace the Transfer Case Motor.
- Perform TRANSFER CASE VERIFICATION TEST Transfer Case Verification Test.

7. INTERMITTENT WIRING AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
3. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.
4. 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 TRANSFER CASE VERIFICATION TEST Transfer Case Verification Test.

No

- Test complete.