Retained Accessory Power (RAP) Malfunction
Retained Accessory Power (RAP) Malfunction
Diagnostic Fault Information
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
Circuit/System Description
The retained accessory power (RAP) relay is located in the instrument panel (I/P) fuse block. The relay control is from the BCM and the coil ground is from G302. The relay switched output feeds the RAP MISC fuse 10 A and the PWR/WINDW circuit breaker both within the I/P fuse block. The RAP MISC fuse supplies voltage to the shift lock control solenoid, inside rearview mirror, and if equipped the sunroof.
Diagnostic Aids
* The Radio RAP function is a separate radio function controlled by the radio and is not effected by the BCM RAP circuits.
* A short to ground or open/high resistance in the accessory voltage circuit will cause only part of the RAP functions to be inoperative. Diagnose these symptoms within the respective system sections.
* A short to voltage on the relay control or relay output circuits would cause the RAP function to remain on past the designated time.
* An stuck relay switch could cause a RAP always on, or a RAP inoperative condition.
Circuit/System Testing
1. Remove the RAP relay. Test for less than 1.0 ohm of resistance between the relay coil ground circuit and ground.
• If greater than 1.0 ohm, test the ground circuit for an open/high resistance.
2. Connect a test lamp between the RAP relay control circuit and ground.
3. With the driver and passenger doors open, cycle the ignition key ON and OFF several times. The test lamp should turn ON and OFF when cycling the ignition switch.
• If the test lamp remains ON all the time, test for a short to voltage on the relay coil control circuit. If the circuit tests normal, replace the BCM.
• If the test lamp remains OFF all the time, test for a short to ground or open/high resistance on the relay coil control circuit. If the circuit tests normal, replace the BCM.
4. If all circuits test normal, test or replace the RAP relay.
Component Testing
Relay Test
1. Ignition OFF, disconnect the RAP relay.
2. Test for 70-110 ohms of resistance between terminals 85 and 86.
• If the resistance is not within the specified range, replace the relay.
3. Test for infinite resistance between the following terminals:
* 30 and 86
* 30 and 87
* 30 and 85
* 85 and 87
• If less than infinite, replace the relay.
4. Install a 20 amp fused jumper wire between relay terminal 85 and 12 volts. Install a jumper wire between relay terminal 86 and ground. Test for less than 2.0 ohms of resistance between terminals 30 and 87.
• If greater than 2.0 ohms, replace the relay.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair. Verification Tests
Control Module References for module replacement, setup, and programming Programming and Relearning