C2113-DRIVETRAIN SENSOR SUPPLY VOLTAGE CIRCUIT OPEN (FDCM)
For a complete wiring diagram Refer to Section 8W
- When Monitored:
With the ignition on and no system undervoltage or overvoltage condition present.
- Set Condition:
The Final Drive Control Module detects that the 5V Supply (Reference) Voltage is correct, but the Transfer Case Selector Switch and Mode Sensor indicate a low voltage condition.
| Possible Causes |
| (K504) DRIVETRAIN 5 VOLT SUPPLY CIRCUIT OPEN |
| (K594) DRIVETRAIN SENSOR RETURN CIRCUIT OPEN |
| FINAL DRIVE CONTROL MODULE (FDCM) |
Diagnostic Test
1. DTC IS ACTIVEIgnition on, engine not running.
With the scan tool, read DTCs in the FDCM.
Is the status Active for this DTC?
Yes
- Go to 2
No
- Go to 4
2. (K504) DRIVETRAIN 5 VOLT SUPPLY CIRCUIT OPEN
Turn the ignition off to the lock position
Disconnect the Transfer Case Motor harness connector.
Disconnect the Final Drive Control Module C2 harness connector.
Measure the resistance of the (K504) Drivetrain 5-volt Supply circuit between the Transfer Case Motor harness connector and the Final Drive Control Module C2 harness connector.
Is the resistance above 5.0 ohms?
Yes
- Repair the (K504) Drivetrain 5-volt Supply circuit for an open.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1 (Refer to 21 - TRANSMISSION/TRANSAXLE/TRANSFER CASE - STANDARD PROCEDURE).
No
- Go to 3
3. (K594) DRIVETRAIN SENSOR RETURN CIRCUIT OPEN
Measure the resistance of the (K594) Drivetrain Sensor Return circuit between the Transfer Case Motor harness connector and the Final Drive Control Module C2 harness connector.
Is the resistance above 5.0 ohms?
Yes
- Repair the (K594) Drivetrain Sensor Return circuit for an open.
- 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).
4. 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.