C140A- TRANSFER CASE MOTOR PERFORMANCE
For a complete wiring diagram Refer to Section 8W
- When Monitored:
With the ignition on and no undervoltage or overvoltage condition present.
- Set Condition:
A faulted condition is detected in the H-bridge driver.
| Possible Causes |
| (T315) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO VOLTAGE |
| (T316) SHIFT MOTOR CONTROL B CIRCUIT SHORTED TO VOLTAGE |
| (T315) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO GROUND |
| (T316) SHIFT MOTOR CONTROL B CIRCUIT SHORTED TO GROUND |
| (T315) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO (T316) SHIFT MOTOR CONTROL B CIRCUIT |
| TRANSFER CASE MOTOR |
| FINAL DRIVE CONTROL MODULE |
Diagnostic Test
1. DTC IS ACTIVEIgnition 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 8
2. (T315) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off to the lock position
Disconnect the Transfer Case Motor harness connector.
Disconnect the Final Drive Control Module C1 harness connector.
Ignition on, engine not running.
Measure the voltage of the (T315) Shift Motor Control A circuit.
Is there any voltage present?
Yes
- Repair the (T315) Shift Motor Control A circuit for a short to voltage.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1 (Refer to 21 - TRANSMISSION/TRANSAXLE/TRANSFER CASE - STANDARD PROCEDURE)
No
- Go to 3
3. (T316) SHIFT MOTOR CONTROL B CIRCUIT SHORTED TO VOLTAGE
Measure the voltage of the (T316) Shift Motor Control B circuit.
Is there any voltage present?
Yes
- Repair the (T316) Shift Motor Control B circuit for a short to voltage.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1 (Refer to 21 - TRANSMISSION/TRANSAXLE/TRANSFER CASE - STANDARD PROCEDURE)
No
- Go to 4
4. (T315) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (T315) Shift Motor Control A circuit.
Is the resistance below 5.0 ohms?
Yes
- Repair the (T315) Shift Motor Control A circuit for a short to ground.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1 (Refer to 21 - TRANSMISSION/TRANSAXLE/TRANSFER CASE - STANDARD PROCEDURE)
No
- Go to 5
5. (T316) SHIFT MOTOR CONTROL B CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (T316) Shift Motor Control B circuit.
Is the resistance below 5.0 ohms?
Yes
- Repair the (T316) Shift Motor Control B circuit for a short to ground.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1 (Refer to 21 - TRANSMISSION/TRANSAXLE/TRANSFER CASE - STANDARD PROCEDURE)
No
- Go to 6
6. (T315) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO (T316) SHIFT MOTOR CONTROL B CIRCUIT
Measure the resistance between the (T315) Shift Motor Control A circuit and the (T316) Shift Motor Control B circuit at the Transfer Case Motor harness connector.
Is the resistance below 5.0 ohms?
Yes
- Repair the (T315) Shift Motor Control A circuit for a short to the (T316) Shift Motor Control B circuit.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1 (Refer to 21 - TRANSMISSION/TRANSAXLE/TRANSFER CASE - STANDARD PROCEDURE)
No
- Go To 7
7. TRANSFER CASE MOTOR
At the Transfer Case Motor, measure the resistance between the (T315) Shift Motor Control A circuit and the (T316) Shift Motor Control B circuit.
Is the resistance below 5.0 ohms?
Yes
- Replace the shorted Transfer Case Motor in accordance with the Service Information.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1 (Refer to 21 - TRANSMISSION/TRANSAXLE/TRANSFER CASE - STANDARD PROCEDURE)
No
- Replace the Final Drive Control Module in accordance with the Service Information.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1 (Refer to 21 - TRANSMISSION/TRANSAXLE/TRANSFER CASE - STANDARD PROCEDURE)
8. 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 (Refer to 21 - TRANSMISSION/TRANSAXLE/TRANSFER CASE - STANDARD PROCEDURE)
No
- Test complete.