Normal Operation
WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
When the smart junction box (SJB) detects the headlamp switch in the HEADLAMPS ON position and the multifunction switch in the LOW BEAM position, the SJB provides voltage through circuits CLF04 (BN/BU) and CLF05 (BU/GN) to the LH and RH low beam headlamps, respectively. Ground is supplied on circuit GD123 (BK/GY) for RH headlamp. Ground for the LH headlamp is routed through a joint connector through circuit GD120 (BK/GN).
| DTC Description | Fault Trigger Conditions |
|---|---|
| B2A2E - Right Front Lamp Low Beam Circuit Open | An on-demand DTC that sets when the SJB detects an open in the RH low beam output circuit. |
| B2A2F - Right Front Lamp Low Beam Circuit Short to Ground | A continuous and on-demand DTC that sets when the SJB detects a short to ground in the RH low beam output circuit. |
| B2A30 - Left Front Lamp Low Beam Circuit Open | An on-demand DTC that sets when the SJB detects an open in the LH low beam output circuit. |
| B2A31 - Left Front Lamp Low Beam Circuit Short to Ground | A continuous and on-demand DTC that sets when the SJB detects a short to ground in the LH low beam output circuit. |
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Joint connector
- Headlamp assembly (MKX)
- SJB