Diagnostic Starting Point - Retained Accessory Power
Review the Retained Accessory Power (RAP) Description and Operation before you begin the system diagnosis. Reviewing the Description and Operation information will help you determine if the condition described by the customer is normal operation.
Begin the system diagnosis with the Diagnostic System Check - Retained Accessory Power . The Diagnostic System Check will provide the following information
- The identification of the control modules which command the system
- The ability of the control modules to communicate through the serial data circuit
- The identification of any stored diagnostic trouble codes (DTCs) and their status
The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.
Scan Tool Data List
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Operating Conditions: BCM powered and communicating with the scan tool. | |||
| Battery Voltage | Data | Volts | 12.60 |
| Driver Door Ajar Sw. | Inputs | On, Off | Off |
| Ignition 0 | Inputs | Active/Inactive | Active |
| Ignition 1 | Inputs | Active/Inactive | Active |
| Ignition Accessory | Inputs | Active/Inactive | Active |
| Passenger Door Ajar Sw. | Inputs | On, Off | Off |
| RAP Relay | Outputs | Active, Inactive | Active |
Scan Tool Data List
Visual/Physical Inspection
- Inspect for aftermarket devices which could affect the operation of the Retained Accessory Power system. Refer to «Checking Aftermarket Accessories»(ref-187796-S08905438042005090100000) in Wiring Systems.
- Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom
- «Retained Accessory Power (RAP) On After Timeout»(ref-187816-S42248823162005090100000)
- «Retained Accessory Power (RAP) Inoperative»(ref-187816-S17343880822005090100000)