C140D

C140D- TRANSFER CASE MOTOR CONTROL CIRCUIT OPEN





For a complete wiring diagram Consult Diagrams/Electrical

- 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.





Diagnostic Test

1. DTC IS ACTIVE
Ignition on, engine not running.
With the scan tool, read DTCs in the Final Drive Control Module.
Is the status Active for this DTC?

Yes

- Go to 2

No

- Go to 7

2. (T315) SHIFT MOTOR CONTROL A CIRCUIT VOLTAGE




Turn the ignition off to the lock position
Disconnect the Transfer Case Motor harness connector.
Ignition on, engine not running.
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




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




Turn the ignition off to the lock position
Disconnect the Final Drive Control Module C1 harness connector.
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 the TRANSFER CASE VERIFICATION TEST-VER 1. Transfer Case Verification Test.

No

- Replace the Final Drive Control Module.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1. Transfer Case Verification Test.

5. (T316) SHIFT MOTOR CONTROL B CIRCUIT OPEN




Turn the ignition off to the lock position
Disconnect the Final Drive Control Module C1 harness connector.
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 the TRANSFER CASE VERIFICATION TEST-VER 1. Transfer Case Verification Test.

No

- Replace the Final Drive Control Module.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1. Transfer Case Verification Test.

6. TRANSFER CASE MOTOR
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. Transfer Case Verification Test.

No

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

7. 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. Transfer Case Verification Test.

No

- Test complete.