Inspection and Verification
WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
- Verify the customer concern.
- Visually inspect for obvious signs of mechanical or electrical damage.VISUAL INSPECTION CHART
Mechanical Electrical - Instrument panel dimmer switch
- Smart junction box (SJB) fuse(s):
- 7 (10A)
- 15 (30A)
- Circuitry
- Illumination bulbs
- Instrument cluster
- SJB
- 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 diagnostic tool to the data link connector and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
- check that the program card is correctly installed.
- check the connections to the vehicle.
- check the ignition switch position.
- Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
- CAN or ISO circuit fault; all electronic control units no response/not equipped, refer to MODULE COMMUNICATIONS NETWORK .
- No response/not equipped for instrument cluster, refer to INSTRUMENT CLUSTER .
- System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out self-test diagnostics for the instrument cluster.
- If the DTCs retrieved are related to the concern, go to the INSTRUMENT PANEL DIAGNOSTIC TROUBLE CODE (DTC) INDEX .
- If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART .
NOTE:
For a complete master list of DTCs, refer to
MULTIFUNCTION ELECTRONIC MODULES
.
INSTRUMENT CLUSTER DIAGNOSTIC TROUBLE CODE (DTC) INDEX
| DTC | Description | Source | Action |
|---|---|---|---|
| B1246 | Dim Panel Potentiometer Switch Circuit Failure | Instrument Cluster | GO to PINPOINT TEST E . |