U0114 Jeep OBD Code
LOST COMMUNICATION WITH FINAL DRIVE CONTROL MODULE (FDCM)
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
With the ignition on.
Battery voltage between 10 and 16 volts.
IOD fuse installed.
TIPM is configured correctly.
- Set Condition:Bus messages not received from the Final Drive Control Module for approximately 2 to 5 seconds.
| Possible Causes |
| (D65) CAN C BUS(+) CIRCUIT SHORTED TO VOLTAGE |
| (D64) CAN C BUS(-) CIRCUIT SHORTED TO GROUND |
| DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES |
| TIPM NOT CONFIGURED CORRECTLY |
| FINAL DRIVE CONTROL MODULE POWER AND GROUND |
| FINAL DRIVE CONTROL MODULE |
| MODULE THAT SET THIS DTC |
Diagnostic Test
1. VERIFY DTC IS ACTIVE
NOTE:
Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.
With the scan tool, read active DTCs.
Is this DTC active?
Yes
- Go To 2
No
- Refer to the Stored Lost Communication test procedure. Refer to the table of contents in this section.
2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
With the scan tool, read all active DTCs from all modules.
NOTE:
Check for TIPM configuration, CAN C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.
Does the scan tool display any active DTCs to the conditions listed above?
Yes
- Diagnose and repair the DTC. Refer to the Index for a complete list of the symptoms.
No
- Go To 3
3. VERIFY THAT THE FDCM IS ACTIVE ON THE BUS
- Turn the ignition on.
- With the scan tool, select Network Diagnostics.
- Verify that the FDCM is active on the bus.
Is the FDCM active on the bus?
Yes
- Go To 4
No
- Refer to the No Response test procedure. Refer to the table of contents in this section.
4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
With the scan tool, select Network Diagnostics.
Is there more than one module with active DTCs 揕ogged Against?the FDCM?
Yes
- Replace/update the Final Drive Control Module (FDCM/ASBS) in accordance with the service information.
- Perform the appropriate VERIFICATION TEST.
No
- Go To 5
5. CLEAR DTC IN MODULE SETTING FAULT
With the scan tool, select the module setting the DTC against the FDCM.
Clear active DTCs.
Is this DTC still active?
Yes
- Replace/update the module that set this DTC in accordance with the service information.
- Perform the appropriate VERIFICATION TEST.
No
- Go To 6
6. CYCLE IGNITION
Cycle the ignition from RUN to OFF three times ending with the key in the RUN position.
Does this DTC become active?
Yes
- Go To 7
No
- The condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken
wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.
- Perform the appropriate VERIFICATION TEST.
7. CHECK FOR ADDITIONAL LOST COMMUNICATION FAULTS
With the scan tool, select Network Diagnostics.
Does the TIPM and other CAN C BUS modules show Lost Communication with the remaining CAN C BUS modules?
Yes
- Go To 8
No
- Replace/update the module that set this DTC in accordance with the service information.
- Perform the appropriate VERIFICATION TEST.
8. (D65) CAN C BUS (+) CIRCUIT SHORTED TO VOLTAGE
Measure the voltage between the (D65) CAN C Bus (+) circuit and ground.
Is the voltage above 5 volts?
Yes
- Repair the (D65) CAN C Bus (+) circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST ?VER 1.(Refer to 8 – ELECTRICAL/ELECTRONIC CONTROL MODULES – STANDARD PROCEDURE)
No
- Go To 9
9. (D64) CAN C BUS (-) CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Measure the resistance between ground and the (D64) CAN C Bus (-) circuit.
Is the resistance below 10K Ohms?
Yes
- Repair the (D64) CAN C Bus (-) circuit for a short to ground.
- Perform the BODY VERIFICATION TEST ?VER 1.(Refer to 8 – ELECTRICAL/ELECTRONIC CONTROL MODULES – STANDARD PROCEDURE)
No
- Replace/update the module that set this DTC in accordance with the service information.
- Perform the appropriate VERIFICATION TEST.