Normal Operation
WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. 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 to the LH and RH low beam headlamps.
DTC DESCRIPTION CHART
| DTC Description | Fault Trigger Conditions |
|---|---|
|
A continuous DTC that sets when the SJB has temporarily shut down the output driver. The module has temporarily disabled a low beam output because an excessive current draw exists (such as a short to ground). The SJB cannot enable the low beam output until the cause of the short is corrected, the DTCs have been cleared and a successful self-test is run. |
|
A continuous DTC that sets when the SJB has permanently shut down the output driver. The module has permanently disabled a low beam output because an excessive current draw fault (such as a short to ground) has exceeded the limits that the SJB can withstand. The cause of the excessive current draw MUST be corrected before a new SJB is installed. |
|
An on-demand DTC that sets when the SJB detects an open from the RH low beam output circuit. |
|
A continuous and on-demand DTC that sets when the SJB detects a short to ground from the RH low beam output circuit. |
|
An on-demand DTC that sets when the SJB detects an open from the LH low beam output circuit. |
|
A continuous and on-demand DTC that sets when the SJB detects a short to ground from the LH low beam output circuit. |
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- SJB