Pinpoint Test C : The Low Beams Are On Continuously: Notes
WARNING: This page is about a different car, the 2018 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Headlamps/Autolamps for schematic and connector information.
Normal Operation and Fault Conditions
REFER to: Exterior Lighting - System Operation and Component Description .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| B1087:86 | LIN Bus "A": Missing Message | A continuous memory DTC that sets when the BCM is missing data from the messages sent from the headlamp switch or the steering column module over the LIN circuit. |
| B1087:88 | LIN Bus "A": Bus Off | A continuous memory DTC that sets when the BCM has lost communication with the headlamp switch and/or the steering column module over the LIN circuit. |
| B1130:83 | Light Switch Module: Value of Signal Protection Calculation Incorrect | A continuous memory DTC that sets when the BCM has received corrupt data from the headlamp switch over the LIN circuit. |
| B1130:87 | Light Switch Module: Missing Message | A continuous memory DTC that sets when the BCM has lost communication with the headlamp switch over the LIN circuit. |
| B1D00:15 | Left Low Beam: Circuit Short to Battery or Open | A continuous memory and on-demand DTC that sets when the BCM detects a short to voltage from the left low beam output circuit. |
| B1D01:15 | Right Low Beam: Circuit Short to Battery or Open | A continuous memory and on-demand DTC that sets when the BCM detects a short to voltage from the right low beam output circuit. |
Possible Sources
- Fuse
- Wiring, terminals or connectors
- Headlamp switch
- Headlamp assembly
- SASM
- BCM
Visual Inspection and Diagnostic Pre-checks
- Inspect the BJB fuse 23 (5A).
- Inspect the headlamp switch for damage.