Pinpoint Test C: The Parking Aid Is Inoperative - Disable Indicator Is Always On/Never On

WARNING: This page is about a different car, the 2005 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

C1 RETRIEVE THE RECORDED PARKING AID MODULE DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND SELF-TESTS
- Check for recorded parking aid module DTCs from the continuous and on-demand self-tests.
- Are any parking aid module DTCs recorded?
- Yes : REFER to the PARKING AID MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX for correct diagnosis.
- No : GO to C2.
C2 CHECK THE PARKING AID INDICATOR OPERATION
- Key in ON position.
- Apply the parking brake.
- Select REVERSE.
- Monitor the parking aid disabled indicator while pressing the parking aid switch.
- Press the parking aid switch to disable the parking aid system.
- Press the parking aid switch to enable the parking aid system.
- Is the indicator on after pressing the switch to disable the system, and off after pressing the switch to enable the system?
- Yes : The system is operating correctly at this time.
- No : PLACE the transmission in PARK. GO to C3.
C3 CHECK CIRCUIT 7-GN23 (YE/BK) FOR A SHORT TO VOLTAGE
- Key in OFF position.
- Disconnect: Parking Aid Switch C9011.
- Key in ON position.
- Measure the voltage between the parking aid switch C9011-1, circuit 7-GN23 (YE/BK), harness side and ground.
  
  Fig 1: Measuring Voltage Between Parking Aid Switch C9011-1, Circuit 7-GN23 (YE/BK) And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
- Yes : GO to C4.
- No : GO to C5.
C4 CHECK CIRCUIT 7-GN23 (YE/BK) FOR A SHORT TO VOLTAGE IN THE MODULE
- Key in OFF position.
- Disconnect: Parking Aid Module C4014b.
- Key in ON position.
- Measure the voltage between the parking aid switch C9011-1, circuit 7-GN23 (YE/BK), harness side and ground.
  
  Fig 2: Measuring Voltage Between Parking Aid Switch C9011-1, Circuit 7-GN23 (YE/BK) And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
- Yes : REPAIR the circuit. TEST the system for normal operation.
- No : GO to C11.
C5 CHECK CIRCUIT 7-GN23 (YE/BK) FOR A SHORT TO GROUND
- Key in OFF position.
- Measure the resistance between the parking aid switch C9011-1, circuit 7-GN23 (YE/BK), harness side and ground.
  
  Fig 3: Measuring Resistance Between Parking Aid Switch C9011-1, Circuit 7-GN23 (YE/BK) And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes : GO to C7.
- No : GO to C6.
C6 CHECK CIRCUIT 7-GN23 (YE/BK) FOR A SHORT TO GROUND IN THE MODULE
- Disconnect: Parking Aid Module C4014b.
- Measure the resistance between the parking aid switch C9011-1, circuit 7-GN23 (YE/BK), harness side and ground.
  
  Fig 4: Measuring Resistance Between Parking Aid Switch C9011-1, Circuit 7-GN23 (YE/BK) And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes : GO to C11.
- No : REPAIR the circuit. TEST the system for normal operation.
C7 CHECK CIRCUIT 31-GN12 (BK/OG) FOR AN OPEN
- Measure the resistance between the parking aid switch C9011-3, circuit 31-GN12 (BK/OG), harness side and ground.
  
  Fig 5: Measuring Resistance Between Parking Aid Switch C9011-3, Circuit 31-GN12 (BK/OG) And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to C8.
- No : REPAIR the circuit. TEST the system for normal operation.
C8 CHECK CIRCUIT 8-GN12 (WH/BU) FOR AN OPEN
- Disconnect: Parking Aid Module C4014b.
- Measure the resistance between the parking aid switch C9011-4, circuit 8-GN12 (WH/BU), harness side and the parking aid module C4014b-9, circuit 8-GN12 (WH/BU), harness side.
  
  Fig 6: Measuring Resistance Between Parking Aid Switch C9011-4, Circuit 8-GN12 (WH/BU) And The Parking Aid Module C4014b-9, Circuit 8-GN12 (WH/BU)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to C9.
- No : REPAIR the circuit. TEST the system for normal operation.
C9 CHECK CIRCUIT 7-GN23 (YE/BK) FOR AN OPEN
- Disconnect: Parking Aid Module C4014b.
- Measure the resistance between the parking aid switch C9011-1, circuit 7-GN23 (YE/BK), harness side and the parking aid module C4014b-10, circuit 7-GN23 (YE/BK), harness side.
  
  Fig 7: Measuring Resistance Between Parking Aid Switch C9011-1, Circuit 7-GN23 (YE/BK) And The Parking Aid Module C4014b-10, Circuit 7-GN23 (YE/BK)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
  - Yes : GO to C9.
  - No : REPAIR the circuit. TEST the system for normal operation.
- C10 CHECK THE PARKING AID SWITCH
  - Measure the resistance between the parking aid switch C9011 pin 1, component side and C9011 pin 3, component side.
    
    Fig 8: Measuring Resistance Between Parking Aid Switch C9011 Pin 1, Component Side And C9011 Pin 3, Component Side
    Courtesy of FORD MOTOR CO.
  - Is the resistance less than 10,000 ohms?
  - Yes : GO to C11.
  - No : INSTALL a new parking aid switch. REFER to PARKING AID SWITCH in this article. TEST the system for normal operation.
- C11 CHECK FOR CORRECT PARKING AID MODULE OPERATION
  - Disconnect all the parking aid module connectors.
  - Check for:
    - corrosion
    - pushed-out pins
  - Connect all the parking aid module 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 parking aid module. REFER to PARKING AID MODULE in this article. 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.