Pinpoint Test BB: No Communication With The Parking Aid Module

WARNING: This page is about a different car, the 2004 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

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

BB1 CHECK CIRCUIT 20-GN10 (PK/YE) FOR VOLTAGE
- Key in OFF position.
- Disconnect: Parking Aid Module C4014b.
- Key in ON position.
- Measure the voltage between the parking aid module C4014b-12, circuit 20-GN10 (PK/YE), harness side and ground.
  
  Fig 1: Measuring Voltage Between Parking Aid Module C4014B-12, Circuit 20-GN10 (PK/YE), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
1. Yes : GO to BB2.
2. No : REPAIR the circuit. TEST the system for normal operation.
BB2 CHECK CIRCUIT 91-GN10 (BN) FOR OPEN
- Key in OFF position.
- Measure the resistance between the parking aid module C4014b-7, circuit 91-GN10 (BN), harness side and ground.
  
  Fig 2: Measuring Resistance Between Parking Aid Module C4014B-7, Circuit 91-GN10 (BN), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
1. Yes : REFER to MODULE COMMUNICATIONS NETWORK .
2. No : REPAIR the circuit. TEST the system for normal operation.