Pinpoint Test A: The Active Park Assist Switch Does Not Respond When Pressed And The Ic Does Not Display The Active Park Assist Message In The Ic Message Center

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.

A1 VERIFY THE CUSTOMER CONCERN
- Ignition ON.
- Apply the brakes.
- Select DRIVE.
- While pressing the active park assist switch, monitor the IC message center
- Does the IC message center read "ACTIVE PARK SEARCHING"?
- Yes: The system is operating correctly at this time. Press and RELEASE the active park assist switch several times to verify that there is no intermittent condition with the switch. If an intermittent condition occurs, GO to A3.
  Otherwise, the system is operating correctly at this time. TEST the system for normal operation.
- No: GO to A2 .
A2 CHECK THE DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND PAM SELF-TESTS
- Check the PAM DTCs from the continuous and on-demand self-tests.
- Are any PAM DTCs recorded?
- Yes: REFER to DTC CHARTS .
- No: GO to A3 .
A3 CHECK THE ACTIVE PARK SWITCH GROUND CIRCUIT FOR AN OPEN
- Disconnect: Active Park Assist Switch C2035.
- Measure the resistance between the active park assist switch C2035-2, circuit GD114 (BK/BU), harness side and ground.
  
  Fig 1: Checking Circuit GD114 For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to A4 .
- No: REPAIR circuit GD114 (BK/BU) for an open. CLEAR the DTCs. TEST the system for normal operation.
A4 CHECK THE ACTIVE PARK SWITCH SIGNAL CIRCUIT FOR AN OPEN
- Disconnect: PAM C4014.
- Measure the resistance between the PAM C4014-10, circuit CMP18 (GN/BN), harness side and the active park assist switch C2035-6, circuit CMP18 (GN/BN), harness side.
  
  Fig 2: Checking Circuit CMP18 For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to A5 .
- No: REPAIR circuit CMP18 (GN/BN) for an open. CLEAR the DTCs. TEST the system for normal operation.
A5 CHECK FOR CORRECT PAM OPERATION
- Disconnect the PAM connector.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect the PAM connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes: INSTALL a new PAM . REFER to PARKING AID MODULE (PAM) . 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.