Inspection and Verification
WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
- Verify the customer concern.
- Visually inspect the following for obvious signs of mechanical or electrical damage.VISUAL INSPECTION CHART
Mechanical Electrical - Multifunction switch
- Battery junction box (BJB) fuse(s):
- 2 (25A) (Escape, Mariner)
- 3 (25A) (Escape, Mariner)
- 12 (25A) (Hybrid)
- 13 (25A) (Hybrid)
- 19 (40A) (Escape, Mariner)
- 21 (40A) (Escape, Mariner)
- 22 (40A) (Hybrid)
- 23 (40A) (Hybrid)
- Smart junction box (SJB) fuse 6 (15A)
- SJB
- Bulb(s)
- Circuitry
- 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 scan tool to the data link connector (DLC).
- If the scan tool does not communicate with the VCM:
- Check the VCM connection to the vehicle.
- Check the scan tool connection to the VCM.
- Refer to MODULE COMMUNICATIONS NETWORK article, No Power To The Scan Tool, to diagnose no communication with the scan tool.
- If the scan tool does not communicate with the vehicle:
- Verify the ignition key is in the ON position.
- Verify the scan tool operation with a known good vehicle.
- Refer to MODULE COMMUNICATIONS NETWORK article to diagnose no response from the powertrain control module (PCM).
- Carry out the network test:
- If the scan tool responds with no communication for one or more modules, refer to MODULE COMMUNICATIONS NETWORK article.
- If the network test passes, retrieve and record the continuous memory diagnostic trouble codes (DTCs).
- Clear the continuous DTCs and carry out the self-test diagnostics for the SJB.
- If the DTCs retrieved are related to the concern, go to the Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index. For all other DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES article.
- If no DTCs related to the concern are retrieved, go to Symptom Chart .
NOTE:
Make sure the multifunction switch is in the OFF and LOW BEAM position.
NOTE:
Make sure to use the latest scan tool software release.
NOTE:
The vehicle communication module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.
SMART JUNCTION BOX (SJB) DIAGNOSTIC TROUBLE CODE (DTC) INDEX
| DTC | Description | Action |
|---|---|---|
| B1342 | ECU is Defective | CLEAR the DTCs. RETRIEVE the DTCs. If DTC B1342 is retrieved again, INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES article. |
| B1472 | Headlamp (Low Beam) ON Switch/Circuit Short to Ground | Go to Pinpoint Test F . |
| B1510 | Flash-to-Pass Switch/Circuit Short to Ground | Go to Pinpoint Test F . |
| B1570 | Lamp Headlamp High Beam Circuit Short to Ground | Go to Pinpoint Test E . |
| B2501 | Headlamp, Left Low Beam Circuit Failure | If the low beam is inoperative, go to Pinpoint Test D . If the low beam is always on, go to Pinpoint Test F . |
| B2503 | Headlamp, Right Low Beam Circuit Failure | If the low beam is inoperative, go to Pinpoint Test D . If the low beam is always on, go to Pinpoint Test F . |
| B2505 | Headlamp, Left High Beam Circuit Failure | If the high beam is inoperative, go to Pinpoint Test E . If the high beam is always on, go to Pinpoint Test F . |
| B2507 | Headlamp, Right High Beam Circuit Failure | If the high beam is inoperative, go to Pinpoint Test E . If the high beam is always on, go to Pinpoint Test F . |
| All other DTCs | - | REFER to MULTIFUNCTION ELECTRONIC MODULES article. |