Circuit Description
The BCM monitors the state of the RAP output by checking the voltage level on the accessory voltage input.
Conditions for Running the DTC
The BCM will be ready to test for and set this DTC when:
| • | The system voltage is at least 9 volts and not more than 18 volts |
| • | All passenger doors are closed |
| • | The rear compartment deck-lid is closed |
| • | The hood is closed |
| • | The ignition is ON |
| • | The above conditions are present for 10 seconds. |
Conditions for Setting the DTC
The BCM detects one of the following incorrect voltage conditions on the BCM program input:
| • | The BCM detects 0 volts while the RAP is enabled |
| • | The BCM detects B+ while the RAP is disabled |
| • | Either condition lasts for more than 50 milliseconds. |
Action Taken When the DTC Sets
| • | The DTC is set in the BCM |
| • | The RAP feature will not deactivate if the RAP output is shorted to B+ |
| • | The RAP driven devices will not operate at all if the RAP output is shorted to ground |
Conditions for Clearing the DTC
The DTC will clear when the fault is corrected and the DTC memory clearing procedure is completed. Refer to On-Board Diagnostic Features in Body Control System.
Diagnostic Aids
If the only DTC that flashes is a history code, DTC 33, the problem is intermittent. Refer to Testing for Electrical Intermittents in Wiring Systems.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Retained Accessory Power (RAP) Schematics | |||
1 | Did you perform A Diagnostic System Check - Retained Accessory Power? | Go to Step 2 | |
2 |
Does the test lamp illuminate? | Go to Step 3 | Go to Step 5 |
3 | Connect a test lamp between the accessory voltage input and a good ground. Does the test lamp remain OFF? | Go to Step 4 | Go to Step 6 |
4 |
Does the test lamp remain OFF? | Go to Step 8 | Go to Step 7 |
5 | Test the RAP B+ circuit for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 10 |
6 | Test the circuits between the accessory voltage input circuit and the RAP output circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 10 |
7 | Test the circuits between the accessory voltage input circuit and the RAP output circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 10 |
8 | Test the accessory voltage input circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 9 |
9 | Test the BCM RAP output for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 10 |
10 | Inspect for poor connections at the harness connectors for the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 11 |
11 |
Important: Perform the set up procedure for the BCM. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System. Replace the BCM. Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | Go to Step 12 | -- |
12 |
Does the DTC reset? | Go to Step 2 | System OK |
