Instrument Panel Dimmer Switch Input
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.
The SJB monitors the instrument panel dimmer switch status to determine if the courtesy lamps are requested. When the instrument panel dimmer switch is rotated to the DOME LAMP position, ground is supplied.
The SJB supplies voltage to the interior courtesy lamp(s) when any of the following conditions exist:
- Any door, liftgate or liftgate window is opened.
- The instrument panel dimmer switch is place in the DOME LAMP position.
- A correct unlock code from the keyless entry keypad or an unlock request from a programmed Remote Keyless Entry (RKE) transmitter is detected.
DTC DESCRIPTION CHART
| DTC Description | Fault Trigger Conditions |
|---|---|
|
An on-demand DTC that sets when the SJB detects an open from the LH front door ajar input circuit. |
|
An on-demand DTC that sets when the SJB detects an open from the RH front door ajar input circuit. |
|
An on-demand DTC that sets when the SJB detects an open from the RH rear door ajar input circuit. |
|
An on-demand DTC that sets when the SJB detects an open from the LH rear door ajar input circuit. |
|
An on-demand DTC that sets when the SJB detects a short to ground from the dome lamp request input circuit. |
|
An on-demand DTC that sets when the SJB detects an open from the liftgate/liftgate window ajar input circuit. |
|
An on-demand DTC that sets when the SJB detects a short to voltage from the courtesy lamp lighting output circuit. |
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Instrument panel dimmer switch
- Liftgate ajar switch (integrated into the liftgate latch)
- Liftgate window ajar switch (integrated into the liftgate window latch)
- Door ajar switch (integrated into the door latch)
- SJB