Pinpoint Test E: DTCS C1701, C1704, C1707 And C1710 Sensor Circuit Fault

WARNING: This page is about a different car, the 2005 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

E1 CHECK THE RECORDED DTCS FROM BOTH THE CONTINUOUS AND ON-DEMAND PARKING AID MODULE SELF-TESTS
- Check the recorded parking aid module DTCs from the continuous and on-demand self-tests.
- Are multiple DTCs recorded?
- Yes : GO to E2.
- No : GO to E3.
E2 CHECK THE BUMPER WIRING HARNESS
- Inspect the bumper wiring harness for opens, shorts, grounds, or corrosion.
- Is the bumper harness OK?
- Yes : GO to E3.
- No : REPAIR or INSTALL a new bumper wiring harness. REPEAT the self-test.
E3 DETERMINE THE CONDITION
NOTE: Make sure the area around the vehicle is clear of anything that may activate the parking aid system.
- Apply the parking brake.
- With the brake pedal applied, shift the transmission into REVERSE.
- Does the parking aid sound a continuous or intermittent tone when no obstacles are present?
- Yes : GO to E6.
- No : GO to E4.
E4 VERIFY THE SUSPECTED SENSOR ALIGNMENT
- Make sure the suspect parking aid sensor is the correct sensor.
- Make sure the suspect parking aid sensor is flush-mounted in the bezel.
- Make sure the suspect parking aid sensor is in alignment. Align the sensor if necessary. Refer to both the AZIMUTH SYSTEM CHECK and ELEVATION SYSTEM CHECK .
- Key in ON position.
- Enter the following diagnostic mode on the diagnostic tool: Parking Aid PID.
- With the brake pedal applied, shift the transmission into REVERSE and monitor the parking aid sensor distance PID. The PID will read 255 cm (100 in) on a correctly functioning sensor.
- Does the PID read 255 cm (100 in)?
- Yes : The system is operating normally at this time. CLEAR the DTCs. REPEAT the self-test.
- No : GO to E5.
E5 INSTALL A KNOWN GOOD SENSOR
- Install a known good sensor for the suspect parking aid sensor.
- Key in ON position.
- Monitor the parking aid PIDs.
- With the brake pedal applied, shift the transmission into REVERSE and monitor the parking aid sensor distance PIDs. The PIDs read 255 cm (100 in) on correctly functioning sensors.
- Does the PID read 255 cm (100 in)?
- Yes : INSTALL a new parking aid sensor. REFER to PARKING AID SENSOR . CLEAR the DTCs. REPEAT the self-test.
- No : GO to E8.
E6 CHECK THE BUMPER FOR DEBRIS
NOTE: Make sure the area around the vehicle is clear of anything that might activate the parking aid system.
- Clean the rear bumper and sensors with high-pressure water.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : GO to E7.
- No : The system is operating correctly at this time. The concern may have been caused by a dirty or blocked parking aid sensor. CLEAR the DTCs. REPEAT the self-test.
E7 CHECK THE PARKING AID SENSOR OPERATION
- Move the vehicle to an open area, free of obstacles.
- Key in ON position.
- Check the parking aid sensor distance and attenuation PIDs.
- Do the parking aid sensor distance PIDs read 255 cm (100 in), and the attenuation PIDs read between 0 and 16?
- Yes : GO to E8.
- No : INSTALL a new parking aid sensor. REFER to PARKING AID SENSOR . CLEAR the DTCs. REPEAT the self-test.
E8 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.