Pinpoint Test H: DTC C1920 And B2373 Led No. 1 Circuit Failure

WARNING: This page is about a different car, the 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. 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.

H1 CHECK FOR RECORDED DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND PARKING AID MODULE SELF-TESTS
- Check for recorded parking aid module DTCs from the continuous and on-demand self-tests.
- Are any DTCs recorded?
Yes : For DTC C1920 or B2373, GO to H2.

All others, REFER to the PARKING AID MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX .

No : GO to PINPOINT TEST B .
H2 CHECK CIRCUIT 1436 (VT/OG) FOR A SHORT TO GROUND
- Key in OFF position.
- Disconnect: Parking Aid Switch C2035.
- Disconnect: Parking Aid Module C4014.
- Measure the resistance between the parking aid module C4014-1, circuit 1436 (VT/OG), harness side and ground.
  
  Fig 1: Checking Circuit 1436 (VT/OG) For Short To Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
Yes : GO to H3.

No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
H3 CHECK CIRCUIT 1436 (VT/OG) FOR AN OPEN
- Measure the resistance between the parking aid module C4014-19, circuit 1436 (VT/OG), harness side and the parking aid switch C2035-6, circuit 1436 (VT/OG), harness side.
  
  Fig 2: Checking Circuit 1436 (VT/OG) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to H4.

No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
H4 CHECK CIRCUIT 1436 (VT/OG) FOR A SHORT TO VOLTAGE
- Key in ON position.
- Measure the voltage between the parking aid module C4014-19, circuit 1436 (VT/OG), harness side and ground.
  
  Fig 3: Checking Circuit 1436 (VT/OG) 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 H5.
H5 CHECK THE PARKING AID SWITCH
- Install a known good parking aid switch.
- Test the system for normal operation.
- Is the concern still present?
Yes : GO to H6.

No : INSTALL a new parking aid switch. REFER to PARKING AID SWITCH . CLEAR the DTCs. REPEAT the self-test.
H6 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 . 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.