Pinpoint Test H: The Rear Video 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.

NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to GENERAL PROCEDURES .

H1 VERIFY VEHICLE EQUIPMENT - NAVIGATION
- Check the vehicle for navigation.
- Is the vehicle equipped with navigation?
- Yes: GO to H7.
- No: GO to H2 .
H2 CHECK THE REVERSING LAMPS OPERATION
- Ignition OFF.
- Apply the parking brake.
- Ignition ON.
- Select REVERSE.
- Check the operation of the reversing lamps.
- Do the reversing lamps operate correctly?
- Yes: GO to H3 .
- No: REFER to REVERSING LAMPS .
H3 CHECK FOR VIDEO CAMERA SIGNAL
- Observe the auto-dimming interior mirror.
- Select PARK.
- Select REVERSE.
- Does the auto-dimming interior mirror momentarily display a blue screen, then turns black?
- Yes: The auto-dimming interior mirror is functional. There is no signal from the video camera. GO to H9.
- No: GO to H4 .
H4 CHECK THE AUTO-DIMMING INTERIOR MIRROR VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: Auto-Dimming Interior Mirror C9039.
- Ignition ON.
- Measure the voltage between the auto-dimming interior mirror C9039-1, circuit CBP41 (BU), harness side and ground.
  
  Fig 1: Measuring Voltage Between Auto-Dimming Interior Mirror C9039-1 And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes: GO to H5 .
- No: REPAIR the circuit. TEST the system for normal operation.
H5 CHECK THE AUTO-DIMMING INTERIOR MIRROR REVERSE INPUT CIRCUIT
- Select REVERSE.
- Measure the voltage between the auto-dimming interior mirror C9039-2, circuit CBB07 (GN/BU), harness side and ground.
  
  Fig 2: Measuring Voltage Between Auto-Dimming Interior Mirror C9039-2 And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes: GO to H6 .
- No: REPAIR the circuit. TEST the system for normal operation.
H6 CHECK THE AUTO-DIMMING INTERIOR MIRROR GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the auto-dimming interior mirror C9039-3, circuit GD182 (BK/GY), harness side and ground.
  
  Fig 3: Checking Auto-Dimming Interior Mirror Ground Circuit For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: INSTALL a new auto-dimming interior mirror. REFER to INTERIOR REAR VIEW MIRROR . CONNECT the negative battery cable. TEST the system for normal operation.
- No: REPAIR the circuit. CONNECT the negative battery cable. TEST the system for normal operation.
H7 CHECK FOR ACM DTCs
- Review the recorded DTCs from the ACM self-test.
- Is DTC C1001:01 or DTC U0155:00 present?
- Yes: For DTC C1001:01, GO to H9.
  For DTC U0155:00, REFER to PINPOINT TEST AH: DTC U0155 OR DTC U0155:00 .
- No: GO to H8 .
H8 CHECK THE ACM DISPLAY
- Select REVERSE.
- Observe the ACM display.
- Does the ACM display "PLEASE CHECK SURROUNDINGS FOR SAFETY" at the top for the screen?
- Yes: GO to H9 .
- No: INSTALL a new ACM . REFER to AUDIO CONTROL MODULE (ACM) . TEST the system for normal operation.
H9 CHECK THE VIDEO CAMERA VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: Video Camera C4234.
- Ignition ON.
- Measure the voltage between the video camera C4234-1, circuit (WH), harness side and ground.
  
  Fig 4: Measuring Voltage Between Video Camera C4234-1 And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes: GO to H10 .
- No: REPAIR the circuit. TEST the system for normal operation.
H10 CHECK THE VIDEO CAMERA GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the video camera C4234-6, circuit (BN/RD), harness side and ground.
  
  Fig 5: Measuring Resistance Between Video Camera C4234-6 And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to H11 .
- No: REPAIR the circuit. CONNECT the negative battery cable. TEST the system for normal operation.
H11 CHECK THE VIDEO CAMERA VIDEO SIGNAL CIRCUITS FOR A SHORT TO GROUND WITH THE AUTO-DIMMING INTERIOR MIRROR (WITHOUT NAVIGATION) OR ACM (WITH NAVIGATION) DISCONNECTED
- Disconnect: Auto-Dimming Interior Mirror (Without Navigation) C9039 Or ACM (With Navigation) C240d.
- Measure the resistance between the video camera C4234-4, circuit (RD), harness side and ground and video camera C4234-5, circuit (BK), harness side and ground.
  
  Fig 6: Checking Video Camera Video Signal Circuits For Short To Ground
  Courtesy of FORD MOTOR CO.
- Are the resistances greater than 10,000 ohms?
- Yes: GO to H12 .
- No: REPAIR the circuit in question. TEST the system for normal operation.
H12 CHECK THE VIDEO CAMERA VIDEO SIGNAL CIRCUITS FOR A SHORT TO VIDEO SHIELD
- Measure the resistance between the video camera C4234-4, circuit (RD), harness side and video camera C4234-2, circuit (NONE), harness side.
  
  Fig 7: Measuring Resistance Between Video Camera C4234-4 And Video Camera C4234-2
  Courtesy of FORD MOTOR CO.
- Measure the resistance between the video camera C4234-5, circuit (BK), harness side and video camera C4234-2, circuit (NONE), harness side.
  
  Fig 8: Measuring Resistance Between Video Camera C4234-5 And Video Camera C4234-2
  Courtesy of FORD MOTOR CO.
- Are the resistances greater than 10,000 ohms?
- Yes: GO to H13 .
- No: REPAIR the circuit in question. CONNECT the negative battery cable. TEST the system for normal operation.
H13 CHECK THE VIDEO CAMERA VIDEO SIGNAL CIRCUITS FOR A SHORT TO VOLTAGE
- Connect: Negative Battery Cable.
- Ignition ON.
- Measure the voltage between the video camera C4234-4, circuit (RD), harness side and ground.
  
  Fig 9: Measuring Voltage Between Video Camera C4234-4 And Ground
  Courtesy of FORD MOTOR CO.
- Measure the voltage between the video camera C4234-5, circuit (BK), harness side and ground.
  
  Fig 10: Measuring Voltage Between Video Camera C4234-5 And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage present on either circuit?
- Yes: REPAIR the circuit in question. TEST the system for normal operation.
- No: GO to H14 .
H14 CHECK VIDEO SIGNAL CIRCUITS FOR AN OPEN
- Ignition OFF.
- Disconnect: Auto-Dimming Interior Mirror (Without Navigation) C9039.
- Disconnect: ACM (With Navigation) C240d.
- Connect a fused jumper wire between the video camera C4234-4, circuit (RD), harness side and the video camera C4234-5, circuit (BK), harness side.
  
  Fig 11: Connecting Fused Jumper Wire Between Video Camera C4234-4 And Video Camera C4234-5
  Courtesy of FORD MOTOR CO.
- For vehicles without navigation, measure the resistance between the auto-dimming interior mirror C9039-8, circuit VMP19 (WH/GN), harness side and the auto-dimming interior mirror C9039-16, circuit RMP19 (BN/VT), harness side.
  
  Fig 12: Measuring Resistance Between Auto-Dimming Interior Mirror C9039-8 And C9039-16
  Courtesy of FORD MOTOR CO.
- For vehicles with navigation, measure the resistance between the ACM C240c-6, circuit RMP19 (BN/VT), harness side and the ACM C240c-1, circuit VMP19 (WH/GN), harness side.
  
  Fig 13: Measuring Resistance Between ACM C240C-6 And C240C-1
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes: REMOVE the jumper wire. CARRY OUT the video camera component test. If the camera is inoperative, INSTALL a new video camera. REFER to VIDEO CAMERA . TEST the system for normal operation.
- No: REMOVE the jumper wire. GO to H15 .
H15 CHECK VIDEO SIGNAL CIRCUIT (+) FOR AN OPEN
- For vehicles without navigation, measure the resistance between the auto-dimming interior mirror C9039-8, circuit VMP19 (WH/GN), harness side and the video camera C4234-4, circuit (RD), harness side.
  
  Fig 14: Measuring Resistance Between Auto-Dimming Interior Mirror C9039-8 And Video Camera C4234-4
  Courtesy of FORD MOTOR CO.
- For vehicles with navigation, measure the resistance between the ACM C240d-1, circuit VMP19 (WH/GN), harness side and the video camera C4234-4, circuit (RD), harness side.
  
  Fig 15: Measuring Resistance Between ACM C240D-1 And Video Camera C4234-4
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes: REPAIR circuit RMP19 (BN/VT) or (BK). TEST the system for normal operation.
- No: REPAIR circuit VMP19 (WH/GN) or (RD). TEST the system for normal operation.