Inspection and Verification

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

Verify the customer concern.

Visually inspect the following for obvious signs of electrical damage.

VISUAL INSPECTION CHART

Electrical
Smart junction box (SJB) fuse 29 (10A) Circuitry Parking aid sensors Parking aid disable switch Parking aid speaker (part of the parking aid module) Reversing lamps

If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

NOTE: Make sure to use the latest scan tool software release.

If the cause is not visually evident, connect the scan tool to the data link connector (DLC).

NOTE: The vehicle communication module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.

If the scan tool does not communicate with the VCM:
- Check the VCM connection to the vehicle.
- Check the scan tool connection to the VCM.
- Refer to MODULE COMMUNICATIONS NETWORK article, No Power To The Scan Tool, to diagnose no communication with the scan tool.
If the scan tool does not communicate with the vehicle:
- Verify the ignition key is in the ON position.
- Verify the scan tool operation with a known good vehicle.
- Refer to MODULE COMMUNICATIONS NETWORK article to diagnose no response from the powertrain control module (PCM).
Carry out the network test:
- If the scan tool responds with no communication for one or more modules, refer to MODULE COMMUNICATIONS NETWORK article.
- If the network test passes, retrieve and record the continuous memory DTCs.
Clear the continuous DTCs and carry out the self-test diagnostics for the parking aid module.
If the DTCs retrieved are related to the concern, go to the Parking Aid Module Diagnostic Trouble Code (DTC) Index. For all other DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES article.
If no DTCs related to the concern are retrieved, go to Symptom Chart .

PARKING AID MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTC	Description	Action
B1299	Power Supply Sensor Circuit Short to Ground	Go to Pinpoint Test B .
B1342	ECU is Faulted	CLEAR the DTCs. REPEAT the parking aid module self-test. If DTC B1342 is retrieved again, INSTALL a new parking aid module. REFER to Parking Aid Module . CLEAR all DTCs. REPEAT the self-test.
B2373	LED #1 Circuit Short to Battery	Go to Pinpoint Test G .
C1699	Left Rear Sensor Circuit Short to Vbat	Go to Pinpoint Test C .
C1700	Left Rear Sensor Circuit Failure or Blockage	Go to Pinpoint Test B .
C1701	Left Rear Sensor Circuit Fault	Go to Pinpoint Test D .
C1702	Right Rear Sensor Circuit Short to Vbat	Go to Pinpoint Test C .
C1703	Right Rear Sensor Circuit Failure or Blockage	Go to Pinpoint Test B .
C1704	Right Rear Sensor Circuit Fault	Go to Pinpoint Test D .
C1705	Left Rear Center Sensor Circuit Short to Vbat	Go to Pinpoint Test C .
C1706	Left Rear Center Sensor Circuit Failure	Go to Pinpoint Test B .
C1707	Left Rear Center Sensor Circuit Fault	Go to Pinpoint Test D .
C1708	Right Rear Center Sensor Circuit Short to Vbat	Go to Pinpoint Test C .
C1709	Right Rear Center Sensor Circuit Failure	Go to Pinpoint Test B .
C1710	Right Rear Center Sensor Circuit Fault	Go to Pinpoint Test D .
C1742	Rear Sounder Circuit Failure	Go to Pinpoint Test E .
C1743	Rear Sounder Circuit Short to Vbatt	Go to Pinpoint Test E .
C1748	Switch Input Circuit Short to Gnd	Go to Pinpoint Test F .
C1920	Led #1 Circuit Failure	Go to Pinpoint Test G .

PARAMETER IDENTIFICATION (PID) INDEX

PID	Description
LRI_DIST	Left rear inner parking aid sensor distance
LRO_DIST	Left rear outer parking aid sensor distance
RRI_DIST	Right rear inner parking aid sensor distance
RRO_DIST	Right rear outer parking aid sensor distance
LRI_ATTEN	Left rear inner attenuation time
LRO_ATTEN	Left rear outer attenuation time
RRI_ATTEN	Right rear inner attenuation time
RRO_ATTEN	Right rear outer attenuation time