PINPOINT TEST C: DTCs C1699, C1702, C1705 AND C1708 - SENSOR CIRCUIT SHORT TO VBAT

WARNING: This page is about a different car, the 2007 Lincoln Mark LT and 2007 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

C1 RETRIEVE THE DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND PARKING AID MODULE SELF-TESTS
- Check the parking aid module DTCs from the continuous and on-demand self-tests.
- Are multiple DTCs recorded?
1. YES : Go to C2 .
2. NO : For DTCs C1699, C1702, C1705 or C1708,Go to C3 .
  For all other DTCs, REFER to the Parking Aid Module Diagnostic Trouble Code (DTC) Index in this article.
C2 CHECK THE BUMPER WIRING HARNESS
- Inspect the bumper wiring harness for opens, shorts, grounds, or corrosion.
- Is the bumper wiring harness OK?
1. YES : Go to C3.
2. NO : REPAIR or INSTALL a new bumper wiring harness. REPEAT the self-test.

C3 CHECK THE SENSOR CIRCUITRY FOR SHORTS TO VOLTAGE

Key in OFF position.
Disconnect: Suspect Parking Aid Sensor C4009, C4010, C4011 or C4012
Disconnect: Parking Aid Module C2023
Key in ON position.

Measure the voltage between the suspect parking aid sensor pin 2, harness side and ground as follows:

DTC	Rear Sensor	Connector -Pin	Circuit
C1699	LH outer	C4009-2	1441 (WH/LG)
C1702	RH outer	C4011-2	1444 (DB/YE)
C1705	LH inner	C4010-2	1442 (DG/WH)
C1708	RH inner	C4012-2	1443 (WH/LB)

Is any voltage present?

YES : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
NO : Go to C4.

C4 CHECK THE PARKING AID SENSORS
- Install a known good parking aid sensor(s) for each of the suspect parking aid sensor(s).
- Clear the DTCs. Repeat the self-test.
- Test the system for normal operation.
- Is the concern still present?
1. YES : If all of the parking aid sensors recorded DTCs prior, go to C5 .
  If one or more parking aid sensor(s) recorded DTCs, INSTALL a new sensor(s) for the one in question. REFER to Parking Aid Sensor in this article. CLEAR the DTCs. REPEAT the self-test.
2. NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
C5 CHECK FOR CORRECT PARKING AID MODULE OPERATION
- Disconnect the parking aid module connector.
- Check for:
  - corrosion
  - damaged pins
  - 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?
1. YES : INSTALL a new parking aid module. REFER to Parking Aid Module in this article. CLEAR the DTCs. REPEAT the self-test.
2. 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.