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Home >> Ford >> 2005 >> Escape Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1468 (Instrument Cluster Illumination And Panel Illumination) >> Diagnosis And Testing >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test C: All Dimmable Switch Illumination Is Inoperative >> Pinpoint Test C: All DIMMABLE Switch Illumination Is Inoperative

Pinpoint Test C: All DIMMABLE Switch Illumination Is Inoperative

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.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. C1 CHECK FOR RECORDED SJB DTCs FROM THE ON-DEMAND SELF-TEST 
    • Use the recorded results from the SJB  self-test.
    • Is DTC B2A32 present? 
    • Yes:  GO to C2  .
    • No:  VERIFY the SJB  fuse 10 (15A) is OK. If OK, GO to C2  .

      If not OK, REFER to the appropriate SYSTEM WIRING DIAGRAMS article to identify the possible causes of the circuit short. After the repair:

      If no DTCs are present, TEST the system for normal operation.

      If DTC B106E is present, CLEAR the DTCs and  REPEAT the self-test (required to enable the backlighting output driver if DTC B106E is present)  . TEST the system for normal operation.

      If DTC B106F is present, INSTALL a new SJB  . REFER to SMART JUNCTION BOX (SJB) . TEST the system for normal operation.

  2. C2 BYPASS THE SJB 
    NOTE: If the jumper wire fails, refer to the appropriate SYSTEM WIRING DIAGRAMS article to identify the possible causes of the circuit short. After the repair:

    If no DTCs are present, test the system for normal operation.

    If DTC B106E is present, Clear the DTCs and repeat the self-test (required to enable the backlighting output driver if DTC B106E is present).  TEST the system for normal operation.

    If DTC B106F is present, install a new SJB  . Refer to SMART JUNCTION BOX (SJB) . TEST the system for normal operation.

    • Ignition OFF.
    • Disconnect: SJB  C2280b.
    • Connect a fused jumper wire between the SJB  C2280b-39, circuit VLN04 (VT/GY), harness side and battery positive.
      Fig 1: Checking Circuit VLN04 For Open
      G06064792Courtesy of FORD MOTOR CO.
    • Do the backlighting components illuminate? 
    • Yes:  REMOVE the jumper wire. GO to C3  .
    • No:  REMOVE the jumper wire. REPAIR circuit VLN04 (VT/GY) for an open. REPEAT the self-test.
  3. C3 CHECK FOR CORRECT SJB OPERATION 
    • Disconnect all the SJB  connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the SJB  connectors and make sure they seat correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes:  INSTALL a new SJB  . REFER to SMART JUNCTION BOX (SJB) . TEST the system for normal operation.
    • No:  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
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