| Diagnosis and Testing Refer to Wiring Diagrams Section 413-13, for schematic and connector information. Worldwide Diagnostic System (WDS) (418-F224) Principles of Operation NOTE:The rear parking aid system will be de-activated when a Ford rear trailer tow module is attached to the vehicle. The ultrasonic parking aid system will default to enabled when the ignition switch is turned to the RUN position, the system is activated by selecting reverse gear. The parking aid system will be disabled if a fault is detected in one of the four rear parking aid sensors, the parking aid speaker or the parking aid module. An error tone approximately 3 seconds long will be emitted from the rear parking aid speaker if a fault is detected. The rear parking aid speaker will also sound for approximately 3 seconds if an error is detected at each ignition cycle or if an error is detected when the system has been activated. Inspection and Verification - Verify the customer concern.
- Visually inspect for obvious signs of electrical damage.
Visual Inspection Chart | Electrical | - Fuse(s)
- Wiring harness(s)
- Electrical connector(s)
- Battery junction box (BJB)
- Rear parking aid sensor(s)
- Rear parking aid speaker
- Parking aid module
| - If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step
- If the cause is not visually evident, connect WDS to the data link connector (DLC) and select the vehicle system to be tested from the diagnostic menu.
- Retrieve the Diagnostic Trouble Code (DTC)s and refer to the DTC Index.
- If no DTC's are retrieved or there is no communication with the module, proceed to the Symptom Chart to continue diagnostics.
Diagnostic Trouble Codes (DTC) Index DTC Index | DTC | Description | Possible Source | Action | | C1699 | Rear outer left sensor signal circuit short to battery | - Parking aid sensor signal circuit.
- Parking aid module.
| Check the circuit 8-GN22 (WH/GN) for short to battery. IF the circuit is OK, INSTALL a new parking aid module.
REFER to: Parking Aid Module (413-13 Parking Aid - Vehicles With: Rear Parking Aid, Removal and Installation).
TEST the system for normal operation. | | C1700 | Rear outer left sensor signal circuit open or short to ground | - Parking aid sensor signal circuit.
- Parking aid sensor.
- Parking aid module.
| GO to Pinpoint Test C. | | C1701 | Concern with rear outer left parking aid sensor | - Rear outer left parking aid sensor.
| CHECK parking aid sensor for contamination. IF a parking sensor is OK. INSTALL a new parking aid sensor. TEST the system for normal operation. | | C1702 | Rear outer right sensor signal circuit short to battery | - Parking aid sensor signal circuit.
- Parking aid module.
| CHECK the circuit 8-GN19 (WH) for short to battery. IF the circuit is OK, INSTALL a new parking aid module.
REFER to: Parking Aid Module (413-13 Parking Aid - Vehicles With: Rear Parking Aid, Removal and Installation).
TEST the system for normal operation. | | C1703 | Rear outer right sensor signal circuit open or short to ground | - Parking aid sensor signal circuit.
- Parking aid sensor.
- Parking aid module.
| GO to Pinpoint Test D. | | C1704 | Concern with rear outer right parking aid sensor | - Rear outer right parking aid sensor.
| CHECK parking aid sensor for contamination. IF a parking sensor is OK. INSTALL a new parking aid sensor. TEST the system for normal operation. | | C1705 | Rear inner left sensor signal circuit short to battery | - Parking aid sensor signal circuit.
- Parking aid module.
| CHECK the circuit 8-GN21 (WH/BU) for short to battery. IF the circuit is OK, INSTALL a new parking aid module.
REFER to: Parking Aid Module (413-13 Parking Aid - Vehicles With: Rear Parking Aid, Removal and Installation).
TEST the system for normal operation. | | C1706 | Rear inner left sensor signal circuit open or short to ground | - Parking aid sensor signal circuit.
- Parking aid sensor.
- Parking aid module.
| GO to Pinpoint Test E. | | C1707 | Concern with rear inner left parking aid sensor | - Rear inner left parking aid sensor.
| CHECK parking aid sensor for contamination. IF a parking sensor is OK. INSTALL a new parking aid sensor. TEST the system for normal operation. | | C1708 | Rear inner right sensor signal circuit short to battery | - Parking aid sensor signal circuit.
- Parking aid module.
| CHECK the circuit 8-GN20 (WH/RD) for short to battery. IF the circuit is OK, INSTALL a new parking aid module.
REFER to: Parking Aid Module (413-13 Parking Aid - Vehicles With: Rear Parking Aid, Removal and Installation).
TEST the system for normal operation. | | C1709 | Rear inner right sensor signal circuit open or short to ground | - Parking aid sensor signal circuit.
- Parking aid sensor.
- Parking aid module.
| GO to Pinpoint Test F. | | C1710 | Concern with rear inner right parking aid sensor | - Rear inner right parking aid sensor.
| CHECK parking aid sensor for contamination. IF a parking sensor is OK. INSTALL a new parking aid sensor. TEST the system for normal operation. | | B1299 | Sensor voltage supply short to ground | - Parking aid sensors voltage supply circuits.
| GO to Pinpoint Test G. | | C1742 | Parking aid speaker circuit short to ground | - Parking aid module.
- circuit(s).
| GO to Pinpoint Test I. | | C1743 | Parking aid speaker circuit short to battery | - Parking aid module.
- circuit(s).
| GO to Pinpoint Test J. | | B1342 | RAM Error | | INSTALL a new parking aid module.
REFER to: Parking Aid Module (413-13 Parking Aid - Vehicles With: Rear Parking Aid, Removal and Installation).
TEST the system for normal operation. | | B2477 | ROM/EEPROM Error | | INSTALL a new parking aid module.
REFER to: Parking Aid Module (413-13 Parking Aid - Vehicles With: Rear Parking Aid, Removal and Installation).
TEST the system for normal operation. | Symptom Chart Symptom Chart | Symptom | Possible Sources | Action | | The rear parking aid is inoperative/does not operate correctly | * Fuse. * Circuit(s). * Parking aid module. | * | | No communication with the parking aid module | * DLC. * Circuit(s). * Parking aid module. | * | Pinpoint Tests | PINPOINT TEST A : THE REAR PARKING AID IS INOPERATIVE/DOES NOT OPERATE CORRECTLY | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | A1: CHECK FOR VOLTAGE TO THE PARKING AID MODULE | | | 1 Disconnect Parking aid module C622. | | | 2 Ignition switch in position II. | | | 3 Measure the voltage between the parking aid module C622 pin 1, circuit 15-GN10 (GN/YE), harness side and ground. | | | Is the voltage greater than 10 volts? Yes No REPAIR the circuit 15-GN10 (GN/YE). TEST the system for normal operation. | | A2: CHECK THE PARKING AID MODULE GROUND CIRCUIT | | | 1 Measure the resistance between the parking aid module C622 pin 16, circuit 31-GN10 (BK), harness side and ground. | | | Is the resistance less than 5 Ohms? Yes No REPAIR the circuit 31-GN10 (BK/YE). TEST the system for normal operation. | | A3: CHECK THE REVERSE LAMP FOR CORRECT OPERATION | | | 1 Select REVERSE. | | | 2 Check the reverse lamps for correct operation. | | | Do the reversing lamps illuminate? Yes No REFER to: Reversing Lamps (417-01 Exterior Lighting, Diagnosis and Testing). TEST the system for normal operation. | | A4: CHECK THE REAR PARKING AID SPEAKER FOR CORRECT OPERATION | | | 1 Remove the rear parking aid speaker.
REFER to: Accessory Drive Belt - 1.6L Duratorq-TDCi (DV) Diesel (303-05A Accessory Drive, Removal and Installation).
| | | 2 Measure the resistance between the rear parking aid speaker C947 pin 1, and pin 2, component side. | | | Is the resistance 50 Ohms +/- 7.5 Ohms? Yes No INSTALL a new rear parking aid speaker. TEST the system for normal operation. | | A5: CHECK THE CIRCUIT 8-GN26 FOR OPEN | | | 1 Disconnect Parking aid module C622. | | | 2 Measure the resistance between the parking aid module C622 pin 10, circuit 8-GN26 (WH), harness side and the rear parking aid speaker C947 pin 1, circuit 8-GN26 (WH), harness side. | | | Is the resistance less than 5 Ohms? Yes No REPAIR the circuit. TEST the system for normal operation. | | A6: CHECK THE CIRCUIT 10-GN26 FOR OPEN | | | 1 Measure the resistance between the parking aid module C622 pin 2, circuit 10-GN26 (GY), harness side and the rear parking aid speaker C947 pin 2, circuit 10-GN26 (GY), harness side. | | | Is the resistance less than 5 Ohms? Yes For vehicles fitted with a rear trailer tow module GO to Pinpoint Test H. For vehicles fitted without a rear trailer tow module. INSTALL a new parking aid module. REFER to: Parking Aid Module (413-13 Parking Aid - Vehicles With: Rear Parking Aid, Removal and Installation). TEST the system for normal operation. No REPAIR the circuit. TEST the system for normal operation. | | PINPOINT TEST B : NO COMMUNICATION WITH THE PARKING AID MODULE | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | B1: CHECK THAT WDS IS COMMUNICATING THROUGH THE DLC | | | 1 Select an alternative system to check the DLC. | | | Is WDS able to communicate with the selected system. Yes No CHECK the DLC. For additional information, refer the the Wiring Diagrams. | | B2: CHECK THE CIRCUIT 8-EE13 FOR OPEN | | | 1 Disconnect Parking aid module C622. | | | 2 Measure the resistance between the DLC pin 11 and parking aid module C622 pin 7, circuit 8-EE13 (WH/RD), harness side. | | | Is the resistance less the 5 Ohms? Yes No REPAIR the circuit 8-EE13 (WH/RD). TEST the system for normal operation. | | B3: CHECK THE DLC CIRCUIT FOR OPEN | | | 1 Measure the resistance between the DLC pin 3 and parking aid module C622 pin 14, harness side. | | | Is the resistance less the 5 Ohms? Yes INSTALL a new parking aid module.
REFER to: Parking Aid Module (413-13 Parking Aid - Vehicles With: Rear Parking Aid, Removal and Installation).
TEST the system for normal operation. No REPAIR the circuit. TEST the system for normal operation. | | PINPOINT TEST C : DTC C1700 : REAR OUTER LEFT SENSOR SIGNAL CIRCUIT OPEN OR SHORT TO GROUND | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | C1: CHECK CIRCUIT 8-GN22 (WH/GN) FOR OPEN | | | 1 Disconnect Parking aid module C623. | | | 2 Disconnect Parking aid sensor C607. | | | 3 Measure the resistance between the parking aid module C623 pin 5, circuit 8-GN22 (WH/GN), harness side and parking aid sensor C607 pin 2, circuit 8-GN22 (WH/GN), harness side. | | | Is the resistance less than 5 Ohms? Yes No REPAIR the circuit. TEST the system for normal operation. | | C2: CHECK CIRCUIT 8-GN22 (WH/GN) FOR SHORT TO GROUND | | | 1 Measure the resistance between the parking aid module C623 pin 5, circuit 8-GN22 (WH/GN), harness side and ground. | | | Is the resistance greater than 10,000 Ohms? Yes INSTALL a new parking aid sensor. If the concern persists, INSTALL a new parking aid module.
REFER to: Parking Aid Module (413-13 Parking Aid - Vehicles With: Rear Parking Aid, Removal and Installation).
No REPAIR the short to ground. TEST the system for normal operation. | | PINPOINT TEST D : DTC C1703 : REAR OUTER RIGHT SENSOR SIGNAL CIRCUIT OPEN OR SHORT TO GROUND | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | D1: CHECK CIRCUIT 8-GN19 (WH) FOR OPEN | | | 1 Disconnect Parking aid module C623. | | | 2 Disconnect Parking aid sensor C604. | | | 3 Measure the resistance between the parking aid module C623 pin 4, circuit 8-GN19 (WH), harness side and parking aid sensor C604 pin 2, circuit 8-GN19 (WH), harness side. | | | Is the resistance less than 5 Ohms? Yes No REPAIR the circuit. TEST the system for normal operation. | | D2: CHECK CIRCUIT 8-GN19 (WH) FOR SHORT TO GROUND | | | 1 Measure the resistance between the parking aid module C623 pin 4, circuit 8-GN19 (WH), harness side and ground. | | | Is the resistance greater than 10,000 Ohms? Yes INSTALL a new parking aid sensor. If the concern persists, INSTALL a new parking aid module.
REFER to: Parking Aid Module (413-13 Parking Aid - Vehicles With: Rear Parking Aid, Removal and Installation).
No REPAIR the short to ground. TEST the system for normal operation. | | PINPOINT TEST E : DTC C1706 : REAR INNER LEFT SENSOR SIGNAL CIRCUIT OPEN OR SHORT TO GROUND | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | E1: CHECK CIRCUIT 8-GN21 (WH/BU) FOR OPEN | | | 1 Disconnect Parking aid module C623. | | | 2 Disconnect Parking aid sensor C606. | | | 3 Measure the resistance between the parking aid module C623 pin 3, circuit 8-GN21 (WH/BU), harness side and parking aid sensor C606 pin 2, circuit 8-GN21 (WH/BU), harness side. | | | Is the resistance less than 5 Ohms? Yes No REPAIR the circuit. TEST the system for normal operation. | | E2: CHECK CIRCUIT 8-GN21 (WH/BU) FOR SHORT TO GROUND | | | 1 Measure the resistance between the parking aid module C623 pin 3, circuit 8-GN21 (WH/BU), harness side and ground. | | | Is the resistance greater than 10,000 Ohms? Yes INSTALL a new parking aid sensor. If the concern persists, INSTALL a new parking aid module.
REFER to: Parking Aid Module (413-13 Parking Aid - Vehicles With: Rear Parking Aid, Removal and Installation).
No REPAIR the short to ground. TEST the system for normal operation. | | PINPOINT TEST F : DTC C1709 : REAR INNER RIGHT SENSOR SIGNAL CIRCUIT OPEN OR SHORT TO GROUND | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | F1: CHECK CIRCUIT 8-GN20 (WH/RD) FOR OPEN | | | 1 Disconnect Parking aid module C623. | | | 2 Disconnect Parking aid sensor C605. | | | 3 Measure the resistance between the parking aid module C623 pin 2, circuit 8-GN20 (WH/RD), harness side and parking aid sensor C605 pin 2, circuit 8-GN20 (WH/RD), harness side. | | | Is the resistance less than 5 Ohms? Yes No REPAIR the circuit. TEST the system for normal operation. | | F2: CHECK CIRCUIT 8-GN20 (WH/RD) FOR SHORT TO GROUND | | | 1 Measure the resistance between the parking aid module C623 pin 2, circuit 8-GN20 (WH/RD), harness side and ground. | | | Is the resistance greater than 10,000 Ohms? Yes INSTALL a new parking aid sensor. If the concern persists, INSTALL a new parking aid module.
REFER to: Parking Aid Module (413-13 Parking Aid - Vehicles With: Rear Parking Aid, Removal and Installation).
No REPAIR the short to ground. TEST the system for normal operation. | | PINPOINT TEST G : DTC B1299 : PARKING AID SENSOR VOLTAGE SUPPLY SHORT TO GROUND | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | G1: CHECK THE CIRCUIT 7-GN19 (YE/RD) FOR SHORT TO GROUND | | | 1 Disconnect Parking aid sensors C604, C605, C606, C607. | | | 2 Disconnect Parking aid module C623. | | | 3 Measure the resistance between the parking aid module C623 pin 11, circuit 7-GN19 (YE/RD), harness side and ground. | | | Is the resistance greater than 10,000 Ohms? Yes No REPAIR the short to ground. TEST the system for normal operation. | | G2: CHECK EACH PARKING AID SENSOR FOR SHORT BETWEEN PINS 1 AND 3 | | | 1 Measure the resistance of each parking aid sensor between pins 1 and 3 component side. | | | Is the resistance less than 5 Ohms? Yes INSTALL a new parking aid sensor(s). TEST the system for normal operation. No INSTALL a new parking aid module. TEST the system for normal operation. | | PINPOINT TEST H : TRAILER TOW INPUT SHORT TO GROUND | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | H1: CHECK PARKING AID MODULE CIRCUIT 9-GN18 (BN/BU) FOR SHORT TO GROUND | | | 1 Disconnect Parking aid module C622. | | | 2 Measure the resistance between the parking aid module C622 pin 5, circuit 9-GN18 (BN/BU), harness side and ground. | | | Is the resistance greater than 10,000 Ohms? Yes TEST the system for normal operation. No REPAIR the short to ground. TEST the system for normal operation. | | PINPOINT TEST I : DTC C1742 PARKING AID SPEAKER CIRCUIT SHORT TO GROUND | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | I1: CHECK THE REAR PARKING AID SPEAKER FOR CORRECT OPERATION | | | 1 Remove the rear parking aid speaker.
REFER to: Accessory Drive Belt - 1.6L Duratorq-TDCi (DV) Diesel (303-05A Accessory Drive, Removal and Installation).
| | | 2 Measure the resistance between the rear parking aid speaker C947 pin 1, and pin 2, component side. | | | Is the resistance 50 Ohms +/- 7.5 Ohms? Yes No INSTALL a new rear parking aid speaker. TEST the system for normal operation. | | I2: CHECK THE CIRCUIT 8-GN26 (WH) FOR SHORT TO GROUND | | | 1 Disconnect Parking Aid Module C622. | | | 2 Measure the resistance between the parking aid module C622 pin 10, circuit 8-GN26 (WH), harness side and ground. | | | Is the resistance greater than 10,000 Ohms? Yes INSTALL a new rear parking aid speaker. TEST the system for normal operation. If the concern persists, INSTALL a new parking aid module.
REFER to: Parking Aid Module (413-13 Parking Aid - Vehicles With: Rear Parking Aid, Removal and Installation).
TEST the system for normal operation. No | | I3: CHECK THE CIRCUIT 10-GN26 (GY) FOR SHORT TO GROUND | | | 1 Measure the resistance between the parking aid module C622 pin 2, circuit 10-GN26 (GY), harness side and ground. | | | Is the resistance greater than 10,000 Ohms? Yes For vehicles fitted with a rear trailer tow module GO to Pinpoint Test H. For vehicles fitted without a rear trailer tow module. INSTALL a new parking aid module. REFER to: Parking Aid Module (413-13 Parking Aid - Vehicles With: Rear Parking Aid, Removal and Installation). TEST the system for normal operation. No REPAIR the short to ground. TEST the system for normal operation. | | PINPOINT TEST J : DTC C1743 PARKING AID SPEAKER CIRCUIT SHORT TO BATTERY | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | J1: CHECK THE REAR PARKING AID SPEAKER FOR CORRECT OPERATION | | | 1 Remove the rear parking aid speaker.
REFER to: Accessory Drive Belt - 1.6L Duratorq-TDCi (DV) Diesel (303-05A Accessory Drive, Removal and Installation).
| | | 2 Measure the resistance between the rear parking aid speaker C947 pin 1, and pin 2, component side. | | | Is the resistance 50 Ohms +/- 7.5 Ohms? Yes No INSTALL a new rear parking aid speaker. TEST the system for normal operation. | | J2: CHECK THE CIRCUIT 8-GN26 (WH) FOR OPEN | | | 1 Disconnect Parking aid module C622. | | | 2 Measure the resistance between the parking aid module C622 pin 10, circuit 8-GN26 (WH), harness side and the rear parking aid speaker C947 pin 1, circuit 8-GN26 (WH), harness side. | | | Is the resistance less than 5 Ohms? Yes No REPAIR the circuit. TEST the system for normal operation. | | J3: CHECK THE CIRCUIT 10-GN26 (GY) FOR OPEN | | | 1 Measure the resistance between the parking aid module C622 pin 2, circuit 10-GN26 (GY), harness side and the rear parking aid speaker C947 pin 2, circuit 10-GN26 (GY), harness side. | | | Is the resistance less than 5 Ohms? Yes For vehicles fitted with a rear trailer tow module GO to Pinpoint Test H. For vehicles fitted without a rear trailer tow module. INSTALL a new parking aid module. REFER to: Parking Aid Module (413-13 Parking Aid - Vehicles With: Rear Parking Aid, Removal and Installation). TEST the system for normal operation. No REPAIR the circuit. TEST the system for normal operation. | |
