Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Retained Accessory Power (RAP) On After Timeout
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Data Link Connector (DLC) Schematics in Data Link Communications Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Retained Accessory Power? | Go to Step 2 | Go to Diagnostic Starting Point - Retained Accessory Power |
| 2 | Install a scan tool. Select diagnostic circuit check and then class 2 power mode. Close all the doors. Turn ON the ignition, with the engine OFF. Wait 5 seconds then turn the ignition OFF. Wait the time-out for retained accessory power (RAP). Did the scan tool display the RAP power mode, then time-out and display Off-Awake power mode? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Inspect for poor connections at the harness connector of the body control module (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 5 | Go to Step 4 |
| 4 | IMPORTANT: Perform the module setup procedure, if required. Replace the BCM. Refer to Control Module References in Body Control System.Did you complete the procedure? | Go to Step 5 | |
| 5 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
| IMPORTANT |
|---|
| Perform the module setup procedure, if required. |
Retained Accessory Power (RAP) On After Timeout
Retained Accessory Power (RAP) Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Data Link Connector (DLC) Schematics in Data Link Communications Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Retained Accessory Power? | Go to Step 2 | Go to Diagnostic Starting Point - Retained Accessory Power |
| 2 | Install a scan tool. Select diagnostic circuit check and then class 2 power mode. Close all the doors. Turn ON the ignition, with the engine OFF. Wait 5 seconds then turn the ignition OFF. Wait the time-out for retained accessory power (RAP). Did the scan tool display the RAP power mode, then time-out and display Off-Awake power mode? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Inspect for poor connections at the harness connector of the body control module (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 5 | Go to Step 4 |
| 4 | IMPORTANT: Perform the module setup procedure if required. Replace the BCM. Refer to Control Module References in Body Control System.Did you complete the procedure? | Go to Step 5 | |
| 5 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
| IMPORTANT |
|---|
| Perform the module setup procedure if required. |
Retained Accessory Power (RAP) Inoperative
Serial Data Control of Retained Accessory Power (RAP)
The class 2 modules receive the power mode message from the body control module (BCM) over the serial data circuits, indicating when the RAP power mode is current. The BCM monitors the ignition switch position, battery condition and passenger compartment doors status to determine whether RAP should be initiated. The modules then support the operation of the systems under their control as required by their RAP power mode operation.
RAP will end when one of the following conditions is met
- The BCM receives an input indicating the opening of any compartment door.
- The BCM internal timer for the RAP expires after approximately 10 minutes.
- The BCM detects a decrease in battery capacity below a prescribed limit.
The BCM then sends a serial data power mode message Off-Awake ending the RAP function.
The class 2 RAP functions are
- The power windows
- The radio