Pinpoint Test J: DTC B1065 Radio Volume Cutback Circuit Short to Battery, B1066 Radio Volume Cutback Circuit Failure: Testing

WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

J1 RETRIEVE THE RECORDED DTC FROM BOTH THE CONTINUOUS AND ON-DEMAND PARKING AID MODULE SELF-TESTS
- Retrieve the recorded parking aid module DTCs from the continuous and on-demand self-tests.
- Are any DTCs recorded?
- Yes : For DTC B1065, GO to J2.
  For DTC B1066, GO to J3.
  
  All others, REFER to the PARKING AID MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX .
- No : GO to PINPOINT TEST B .
J2 CHECK CIRCUIT 689 (DB) FOR A SHORT TO VOLTAGE
- Key in OFF position.
- Disconnect: Parking Aid Module C3267.
- Measure the voltage between the parking aid module C3267-7, circuit 689 (DB), harness side and ground.
  
  Fig 1: Checking circuit 689(DB) For Short To Voltage
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
- Yes : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
- No : GO to J5.
J3 CHECK CIRCUIT 689 (DB) FOR AN OPEN
- Disconnect: Audio Unit C240a.
- Measure the resistance between the parking aid module C3267-7, circuit 689 (DB), harness side and the audio unit C240a-20, circuit 689 (DB), harness side.
  
  Fig 2: Checking Circuit 689 (DB) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to J4.
- No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
J4 CHECK CIRCUIT 689 (DB) FOR A SHORT TO GROUND
- Measure the resistance between the parking aid module C3267-7, circuit 689 (DB), harness side and ground.
  
  Fig 3: Checking circuit 689 (DB) For Short To Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes : GO to J5.
- No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
J5 CHECK FOR CORRECT PARKING AID MODULE OPERATION
- Disconnect the parking aid module connector.
- Check for:
  - corrosion
  - pushed-out pins
- Connect the parking aid module connector and make sure it seats correctly.
- Operate the system and determine if the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new parking aid module. REFER to PARKING AID MODULE . CLEAR the DTCs. REPEAT the self-test. CARRY OUT the diagnostic tool data link 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.