Diagnostic Aids
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.
Before performing this procedure, ensure that the following conditions are met:
- The vehicle park brake is SET.
- The rear parking assist (RPA) disable switch is ON.
Rear Parking Assist Malfunction
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Rear Parking Assist Schematics | ||||
| 1 | Did you review the operation and perform the necessary inspections? | - | Go to Step 2 | Go to Symptoms - Ultrasonic Rear Parking Assist |
| 2 |
|
- | Go to Step 3 | Go to Step 4 |
| 3 |
|
- | Go to Step 14 | Go to TESTING FOR INTERMITTENT AND POOR CONNECTIONS . |
| 4 | Does the red indicator flash? | - | Go to Rear Parking Assist Inoperative - Red Indicator Flashes | Go to Step 5 |
| 5 | Do all of the indicators but 1 indicator illuminate? | - | Go to Step 7 | Go to Step 6 |
| 6 | Does any indicator remain on? | - | Go to Step 8 | Go to Step 11 |
| 7 | Connect a test lamp between the control circuit of the inoperative indicator at the module connector and a good ground. Does the test lamp illuminate? |
- | Go to Step 21 | Go to Step 9 |
| 8 |
|
- | Go to Step 10 | Go to Step 20 |
| 9 | Test the control circuit of the inoperative indicator for an open, for a short to battery voltage and for a high resistance. Refer to CIRCUIT TESTING
and to WIRING REPAIRS
. Did you find and correct the condition? |
- | Go to Step 26 | Go to Step 20 |
| 10 | Test the control circuit of the inoperative indicator for a short to ground. Refer to CIRCUIT TESTING
and to WIRING REPAIRS
. Did you find and correct the condition? |
- | Go to Step 26 | Go to Step 21 |
| 11 | Test the rear object sensor control module ground circuit for an open. Refer to CIRCUIT TESTING
and to WIRING REPAIRS
. Did you find and correct the condition? |
- | Go to Step 26 | Go to Step 12 |
| 12 | Test the rear object sensor control module ignition 1 voltage circuit for an open or for a short to ground. Refer to CIRCUIT TESTING
and to WIRING REPAIRS
. Did you find and correct the condition? |
- | Go to Step 26 | Go to Step 13 |
| 13 | Test the backup lamp supply voltage circuit for an open or for short to groundshort to voltage. Refer to CIRCUIT TESTING
and to WIRING REPAIRS
. Did you find and correct the condition? |
- | Go to Step 26 | Go to Step 16 |
| 14 |
|
- | Go to Step 15 | Go to Step 22 |
| 15 | Test the RPA switch signal circuit for an open or for a high resistance. Refer to CIRCUIT TESTING
and to WIRING REPAIRS
. Did you find and correct the condition? |
- | Go to Step 26 | Go to Step 21 |
| 16 |
|
- | Go to Step 22 | Go to Step 17 |
| 17 | Test the RPA switch signal circuit for a short to ground. Refer to CIRCUIT TESTING
and to WIRING REPAIRS
. Did you find and correct the condition? |
- | Go to Step 26 | Go to Step 18 |
| 18 |
|
- | Go to Step 20 | Go to Step 19 |
| 19 | Test the rear parking assist display supply voltage circuit for an open and for a short to ground. Refer to CIRCUIT TESTING
and to WIRING REPAIRS
. Did you find and correct the condition? |
- | Go to Step 26 | Go to Step 21 |
| 20 | Inspect for poor connections at the harness connector of the rear park assist display. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS
and to CONNECTOR REPAIRS
. Did you find and correct the condition? |
- | Go to Step 26 | Go to Step 24 |
| 21 | Inspect for poor connections at the harness connector of the rear object sensor control module. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS
and to CONNECTOR REPAIRS
. Did you find and correct the condition? |
- | Go to Step 26 | Go to Step 25 |
| 22 | Inspect for poor connections at the harness connector of the RPA switch. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS
and to CONNECTOR REPAIRS
. Did you find and correct the condition? |
- | Go to Step 26 | Go to Step 23 |
| 23 | Replace the RPA switch. Refer to Object Alarm Module Switch Replacement - Rear . Did you complete the replacement? |
- | Go to Step 26 | - |
| 24 | Replace the rear park assist display. Refer to Information Center Telltale Assembly Replacement (Utility) or Information Center Telltale Assembly Replacement (Escalade EXT) . Did you complete the replacement? |
- | Go to Step 26 | - |
| 25 | Replace the rear object sensor control module. Refer to Object Alarm Module Replacement (Utility) or Object Alarm Module Replacement (Escalade EXT) . Did you complete the replacement? |
- | Go to Step 26 | - |
| 26 | Operate the system in order to verify the repair. Did you correct the condition? |
- | System OK | Go to Step 2 |