Diagnostic Trouble Code (DTC) Displaying

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

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:

With the ignition 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 .
Turn the ignition ON.
Place foot on the brake.
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
8	Sensor Supply Voltage Circuit and Sensor Low Reference Circuit IMPORTANT: This diagnostic pattern sets for an open sensor supply voltage circuit and sensor low reference circuit.	X	X	X	X Flashes in the following sequence: Amber Outside Amber Outside and Amber Middle Amber Middle and Red Outside Red Outside
9	Sensor Supply Voltage Circuit IMPORTANT: This diagnostic pattern sets for a short to ground in the sensor supply voltage circuit.	X	X	X	-