Pinpoint Test G: The Parking Aid Module Does Not Respond To The Diagnostic Tool

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

G1 CHECK THE PARKING AID MODULE CONNECTOR FOR DAMAGE
- Key in OFF position.
- Disconnect: Parking Aid Module C4226 (Expedition) or C4014b (Navigator).
- Inspect the parking aid module C4226 (Expedition) or C4014b (Navigator) for damage.
- Is the parking aid module connector OK?
- Yes : For Expedition, GO to G2. For Navigator, GO to G3.
- No : REPAIR the parking aid module connector in question. CARRY OUT the data link diagnostics test.
G2 CHECK CIRCUIT 70 (LB/WH) BETWEEN THE DATA LINK CONNECTOR (DLC) C251 AND THE PARKING AID MODULE C4226 FOR AN OPEN
- Measure the resistance between the parking aid module C4226 pin 5, circuit 70 (LB/WH), harness side and the DLC C251 pin 7, circuit 70 (LB/WH), harness side.
  
  Fig 1: Checking Circuit 70 (LB/WH) Between Data Link Connector (DLC) C251 And Parking Aid Module C4226 For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to G4.
- No : REPAIR the circuit in question. CARRY OUT the data link diagnostics test.
G3 CHECK CIRCUITS 2180 (WH/BK) AND 2181 (BK/YE) BETWEEN THE DLC C251 AND THE PARKING AID MODULE C4014B FOR AN OPEN
- Measure the resistance between the parking aid module C4014b pin 2, circuit 2180 (WH/BK), harness side and the DLC C251 pin 3, circuit 2180 (WH/BK), harness side.
  
  Fig 2: Measuring Resistance Between Parking Aid Module C4014B Pin 2, Circuit 2180 (WH/BK) And DLC C251 Pin 3, Circuit 2180 (WH/BK)
  Courtesy of FORD MOTOR CO.
- Measure the resistance between the parking aid module C4014b pin 1, circuit 2181 (BK/YE), harness side and the DLC C251 pin 11, circuit 2181 (BK/YE), harness side.
  
  Fig 3: Measuring Resistance Between Parking Aid Module C4014B Pin 1, Circuit 2181 (BK/YE) And DLC C251 Pin 11, Circuit 2181 (BK/YE)
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes : GO to G4.
- No : REPAIR the circuit in question. CARRY OUT the data link diagnostics test.
G4 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 . CLEAR the diagnostic trouble codes (DTCs). REPEAT the self-test. CARRY OUT the data link diagnostics test.
- 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. CARRY OUT the data link diagnostics test.