Diagnostic Fault Information
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
RAP Relay Control | B1475 | 1 | 1 | -- |
Ground (RAP relay) | -- | 1 | -- | -- |
1. Retained Accessory Power (RAP) Malfunction | ||||
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. |
Reference Information
Schematic Reference
Retained Accessory Power (RAP) Schematics
Connector End View Reference
Master Electrical Component List
Electrical Information Reference
Circuit/System Testing
- Remove the RAP relay. Test for less than 1.0 ohm of resistance between the relay coil ground circuit and ground.
- Connect a test lamp between the RAP relay control circuit and ground.
- 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 all circuits test normal, test or replace the RAP relay.
| ⇒ | If greater than 1.0 ohm, test the ground circuit for an open/high resistance. |
| ⇒ | 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. |
Component Testing
Relay Test
- Ignition OFF, disconnect the RAP relay.
- Test for 70-110 ohms of resistance between terminals 85 and 86.
- Test for infinite resistance between the following terminals:
- 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 the resistance is not within the specified range, replace the relay. |
| • | 30 and 86 |
| • | 30 and 87 |
| • | 30 and 85 |
| • | 85 and 87 |
| ⇒ | If less than infinite, replace the relay. |
| ⇒ | If greater than 2.0 ohms, replace the relay. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Control Module References for module replacement, setup, and programming
