Inspection and Verification
WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
- Verify the customer concern.
- Visually inspect the following for obvious signs of mechanical or electrical damage.VISUAL INSPECTION CHART
Mechanical Electrical - Windshield washer hoses
- Wiper linkage
- Multi-function switch
- Battery junction box (BJB) fuse 110 (30A)
- Central junction box (CJB) fuse 7 (10A)
- Circuitry
- Windshield wiper motor
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the cause is not visually evident, connect the scan tool to the data link connector (DLC).
- If the scan tool does not communicate with the VCM:
- check the VCM connection to the vehicle.
- check the scan tool connection to the VCM.
- refer to MODULE COMMUNICATIONS NETWORK article, No Power To The Scan Tool, to diagnose no communication with the scan tool.
- If the scan tool does not communicate with the vehicle:
- verify the ignition key is in the ON position.
- verify the scan tool operation with a known good vehicle.
- refer to MODULE COMMUNICATIONS NETWORK article to diagnose no response from the LCM.
- Preform the network test.
- If the scan tool responds with no communication from one or more modules, refer to MODULE COMMUNICATIONS NETWORK article.
- If the network test passes, retrieve and record the continuous memory DTCs.
- Clear the continuous DTCs and Preform the self-test diagnostics for the LCM.
- If the DTCs retrieved are related to the concern, refer to Lighting Control Module (LCM) DIAGNOSTIC TROUBLE CODE Index . For all other DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES article.
- If not DTCs related to the concern are retrieved, go to Symptom Chart .
NOTE:
The windshield wiper motor does not communicate on the network. The windshield wiper motor provides wiper on/off status directly to the lighting control module (LCM).
NOTE:
Make sure to use the latest scan tool software release.
NOTE:
The vehicle communication module (VCM) LED prove out confirms power and ground from the DLC are provided to the VCM.
LIGHTING CONTROL MODULE (LCM) DIAGNOSTIC TROUBLE CODE INDEX
| DTC | Description | Source | Action |
|---|---|---|---|
| B1449 | Wiper Park Sense Circuit Short to Ground | Lighting Control Module (LCM) | DISCONNECT LCM C2145D and windshield wiper motor C125. CHECK circuit 28 (BK/PK) for a short to ground. MEASURE the resistance between LCM C2145D-14, circuit 28 (BK/PK), harness side and ground. REPAIR the short to ground as needed. If circuit is OK, INSTALL a new LCM. CLEAR the DTC. Preform the self-test. |
| All other DTCs | - | LCM | REFER to the Master DTC Index in MULTIFUNCTION ELECTRONIC MODULES article. |