Pinpoint Test A: No Communication With The Parking Aid Module

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.

A1 CHECK CIRCUIT 1040 (RD/BK) FOR VOLTAGE
- Disconnect: Parking Aid Module C4014.
- Key in ON position.
- Measure the voltage between the parking aid module C4014-1, circuit 1040 (RD/BK), harness side and ground.
  
  Fig 1: Checking Circuit 1040 (RD/BK) For Voltage
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : GO to A2.

No : VERIFY the smart junction box (SJB) fuse 29 (10A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation.
A2 CHECK CIRCUIT 57 (BK) FOR AN OPEN
- Key in OFF position.
- Measure the resistance between the parking aid module C4014-4, circuit 57 (BK), harness side and ground.
  
  Fig 2: Checking Circuit 57 (BK) For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : REFER to MODULE COMMUNICATIONS NETWORK to continue communication diagnosis.

No : REPAIR the circuit. TEST the system for normal operation.