LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 136 (Information Center - Instrumentation, Message Center, And Warning Chimes - F150) >> Diagnosis And Testing >> Instrumentation, Message Center and Warning Chimes >> Pinpoint Tests >> Pinpoint Test AG: The Compass Is Inoperative (Without Navigation) >> Pinpoint Test Ag: The Compass Is Inoperative (Without Navigation)

Pinpoint Test Ag: The Compass Is Inoperative (Without Navigation)

WARNING: This page is about a different car, the 2012 Ford Pickup. 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. AG1 CHECK THE COMPASS MODULE VOLTAGE SUPPLY 
    • Ignition OFF.
    • Disconnect: Compass Module C909.
    • Disconnect: Auto-Dimming Interior Mirror C9039.
    • Ignition ON.
    • For the compass module, measure the voltage between the compass module C909-1, circuit CBP32 (GN/VT), harness side and ground.
      Fig 1: Measuring Voltage Between Compass Module C909-1, Circuit CBP32 (GN/VT) And Ground
      G07408063Courtesy of FORD MOTOR CO.
    • For the auto-dimming interior mirror, measure the voltage between the auto-dimming interior mirror C9039-1, circuit CBP32 (GN/VT), harness side and ground.
      Fig 2: Measuring Voltage Between Auto-Dimming Interior Mirror C9039-1, Circuit CBP32 (GN/VT) And Ground
      G06133529Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
      • Yes  : GO to  AG2.
      • No  : VERIFY the BCM fuse 32 (15A). If OK, REPAIR circuit CBP32 (GN/VT) for an open. TEST the system for normal operation. If not OK, REFER to the Wiring Diagrams information to identify the possible causes of the circuit short.
  2. AG2 CHECK THE COMPASS MODULE VOLTAGE SUPPLY FOR VOLTAGE 
    • Ignition OFF.
    • For the compass module, measure the voltage between the compass module C909-1, circuit CBP32 (GN/VT), harness side and the compass module C909-2, circuit GD133 (BK), harness side.
      Fig 3: Measuring Voltage Between Compass Module C909-1, Circuit CBP32 (GN/VT) And Compass Module C909-2, Circuit GD133 (BK)
      G07408064Courtesy of FORD MOTOR CO.
    • For the auto-dimming interior mirror, measure the voltage between the auto-dimming interior mirror C9039-1, circuit CBP32 (GN/VT), harness side and the compass module C9039-4, circuit GD133 (BK), harness side.
      Fig 4: Measuring Voltage Between Auto-Dimming Interior Mirror C9039-1, Circuit CBP32 (GN/VT) And Compass Module C9039-4, Circuit GD133 (BK)
      G07964094Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
      • Yes  : GO to  AG3.
      • No  : REPAIR circuit GD133 (BK) for an open. TEST the system for normal operation.
  3. AG3 CHECK THE COMPASS COMMUNICATION LINE FOR A SHORT TO VOLTAGE 
    • Disconnect: DC/AC Inverter Module C2293A.
    • Disconnect: BCM C2280B.
    • Ignition ON.
    • For the compass module, measure the voltage between the compass module C909-3, circuit VDN01 (BU/WH), harness side and ground.
      Fig 5: Measuring Voltage Between Compass Module C909-3, Circuit VDN01 (BU/WH), Harness Side And Ground
      G07408065Courtesy of FORD MOTOR CO.
    • For the auto-dimming interior mirror, measure the voltage between the auto-dimming interior mirror C9039-2, circuit VDN01 (BU/WH), harness side and ground.
      Fig 6: Measuring Voltage Between Auto-Dimming Interior Mirror C9039-2, Circuit VDN01 (BU/WH), Harness Side And Ground
      G07406188Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
      • Yes  : REPAIR circuit VDN01 (BU/WH) for a short to voltage. TEST the system for normal operation.
      • No  : GO to  AG4.
  4. AG4 CHECK THE COMPASS COMMUNICATION LINE FOR AN OPEN AND SHORT TO GROUND 
    • For the compass module, measure the resistance between the BCM C2280B-52, circuit VDN01 (BU/WH), harness side and the compass module C909-3, circuit VDN01 (BU/WH), harness side; and between the BCM C2280B-52, circuit VDN01 (BU/WH), harness side and ground.
      Fig 7: Measuring Resistance Between BCM C2280B-52, Circuit VDN01 (BU/WH) And Compass Module C909-3, Circuit VDN01 (BU/WH)
      G07408066Courtesy of FORD MOTOR CO.
    • For the auto-dimming interior mirror, measure the resistance between the BCM C2280B-52, circuit VDN01 (BU/WH), harness side and the auto-dimming interior mirror C9039-2, circuit VDN01 (BU/WH), harness side; and between the BCM C2280B-52, circuit VDN01 (BU/WH), harness side and ground.
      Fig 8: Measuring Resistance Between BCM C2280B-52, Circuit VDN01 (BU/WH) And Auto-Dimming Interior Mirror C9039-2, Circuit VDN01 (BU/WH)
      G07406189Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms between the BCM and the compass module, and greater than 10, 000 ohms between the BCM and ground? 
      • Yes  : INSTALL a new compass module or auto-dimming interior mirror. REFER to REAR VIEW MIRRORS . SET the zone. REFER to Compass Zone Adjustment  . CALIBRATE the compass. REFER to Compass Calibration  . CLEAR the DTCs. REPEAT the self-test.

        If the compass is still inoperative, GO to  AG5.

      • No  : REPAIR circuit VDN01 (BU/WH) for an open or short to ground. TEST the system for normal operation.
  5. AG5 CHECK FOR CORRECT BCM OPERATION 
    • Disconnect all the BCM connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the BCM 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 BCM. REFER to MULTIFUNCTION ELECTRONIC MODULES . 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.
scientia non olet · About LEMON Manuals