U0169-LOST COMMUNICATION WITH SUNROOF CONTROL MODULE
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.
FCM is configured correctly.
- Set Condition:
Bus messages not received from the Sunroof Motor/Module (SUNR) for approximately 2 to 5 seconds.
| Possible Causes |
| CAN B BUS CIRCUITS OPEN OR SHORTED |
| DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES |
| FCM NOT CONFIGURED CORRECTLY |
| SUNROOF MOTOR/MODULE POWER AND GROUND |
| SUNROOF MOTOR/MODULE |
| MODULE THAT SET THIS DTC |
Diagnostic Test
1.VERIFY DTC IS ACTIVENOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.
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
NOTE: Check for FCM configuration, CAN B or 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 Table of Contents for a complete list of the symptoms.
No
- Go To 3
3.VERIFY THAT THE SUNR IS ACTIVE ON THE BUS
Is the SUNR active on the bus?
Yes
- Go To 4
No
- Refer to the Table of Contents located in this section for a no response test procedure.
4.CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
Is there more than one module with active DTCs “Logged Against” the SUNR?
Yes
- Replace/update the Sunroof Motor/Module in accordance with the service information.
- Perform 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.