Mechanics

CADILLAC ESCALADE EXT SENSOR PROBLEM

2004 Cadillac Escalade Ext • 95,000 miles

My park assist sensors are failing. I was driving and put it in reverse and only the red light came on with no sound. I drove to my destination and back home. Put it in reverse and all lights came on with sound, but nothing behind me. I need your help.
Is there a youtub as to how to check, remove and repair the sensor? If not, can you assist with my issuers how to solve my concerns?
Thanks
Avatar
U7616
February 18, 2013.




There are 4 sensors in bumper and scan for codes to see which one is going bad or causing problem.


Hmac300
Feb 18, 2013.
Since I do not have a scanner to detect codes, how do I physicial check the one that's bad?


Tiny
U7616
Feb 18, 2013.
Ok I found something for you.
DIAGNOSTIC TROUBLE CODE (DTC) DISPLAYING

This vehicle is equipped with an on board diagnostic display feature capable of displaying diagnostic trouble codes using the 3 indicators on the rear parking assist display. After the bulb check has been completed,  the
red outside indicator flashes to indicate a malfunction with the system. The module disables operation of the URPA system under this condition.

In order to enter the diagnostic mode,  complete the following actions: 1. With the ignition turned OFF,  short the rear parking assist diagnostic connector to ground while the vehicle is in PARK. For the location of the rear parking assist (RPA) diagnostic connector,  refer to Rear
Parking Assist Component Views.
2. Turn ON the ignition.
3. Place foot on the brake.
4. Shift the vehicle into REVERSE within 5 seconds.

If the vehicle is not shifted into reverse within 5 seconds after turning the ignition ON,  the diagnostic mode will still be initiated. However,  a reverse input wiring fault will be registered as sequence #7 as shown in
the Diagnostic Indicator table below. Refer to Diagnostic Trouble Code (DTC) Clearing for the specific steps on how to clear diagnostic trouble codes. After the reverse input wiring code is cleared,  repeat the
diagnostic trouble code displaying steps in order to enter the diagnostic mode.

When the diagnostic mode is first entered,  the rear parking assist display displays the amber outside indicator and the red outside indicator. Then,  the indicators on the rear parking assist display will display one or more
of the sequences in the table below to indicate where the fault exists within the rear parking assist system. Refer to Diagnostic Trouble Code (DTC) Clearing for the specific steps on how to clear diagnostic trouble
codes.
Diagnostic Indicators
# State/Fault Location Amber Outside Amber Middle Red Outside Flashing
1 Start of Diagnostics X X
2 RR Corner Object Sensor and Wiring X
3 RR Middle Object Sensor and Wiring X X
4 LR Middle Object Sensor and Wiring X X
5 LR Corner Object Sensor and Wiring X
6 Chime Warning Wiring X
7 Reverse Input Wiring X X
Sensor Supply Voltage Circuit and Sensor Low X
Reference Circuit Flashes in the following sequence: Sensor Supply Voltage Circuit and Sensor Low
Reference Circuit 1. Amber Outside
8 X X X 2. Amber Outside and Amber Middle
IMPORTANT: 3. Amber Middle and Red Outside
This diagnostic pattern sets for an open sensor 4. Red Outside
supply voltage circuit and sensor low
reference circuit.
Sensor Supply Voltage Circuit

9 IMPORTANT: X X X
This diagnostic pattern sets for a short to
ground in the sensor supply voltage circuit.
DIAGNOSTIC TROUBLE CODE (DTC) CLEARING

The rear parking assist diagnostic sequences may be cleared in one of the following ways: Vehicle Moving

IMPORTANT: The sequences will not clear if the rear parking assist diagnostic connector is grounded.

1. Drive the vehicle forward at least 24 km/h (15 mph).
2. Stop the vehicle.
3. Turn the ignition OFF.

Vehicle Stopped

IMPORTANT: The sequences will not clear if the rear parking assist diagnostic connector is grounded.

1. Turn the ignition ON.
2. Place your foot on the brake.
3. Shift the vehicle into REVERSE within 5 seconds.
4. Turn the ignition OFF.
Good luck arrow points to grounding for dtc codes.
AD


Hmac300
Feb 18, 2013.

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