Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC B1475 00: Retained Accessory Power CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
RAP 1 Relay Switch B+ | 1 | 1 | -- | -- |
RAP 1 Relay Coil B+ | B1475 00, 1 | 1 | -- | -- |
RAP 1 Relay Control | 1 | 1 | 1 | -- |
RAP 1 Relay Ground | -- | 1 | -- | -- |
1. Retained Accessory Power (RAP) Malfunction | ||||
Circuit/System Description
The body control module (BCM) controls the RAP 1 relay through the RAP relay coil voltage circuit by applying voltage to the coil side of the relay. The RAP relay is energized when any of the following conditions are true:
| • | Ignition switch is in the ACCESSORY or RUN position. |
| • | The vehicle was remote started. |
| • | The vehicle is in RAP mode. |
Conditions for Running the DTC
| • | The system voltage is between 9-16 V. |
| • | The output is actively being requested by the module. |
Conditions for Setting the DTC
The BCM detects a short to ground in the RAP relay coil voltage circuit.
Action Taken When the DTC Sets
The BCM will shut down voltage to the circuit.
Conditions for Clearing the DTC
| • | The condition responsible for setting the DTC no longer exists. |
| • | A history DTC will clear once 50 consecutive malfunction-free ignition cycles have occurred. |
Diagnostic Aids
The radio RAP mode is a separate function and will still operate properly. The radio RAP function is controlled by serial data and the specific module. These functions are not effected by the BCM RAP relay circuits.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Retained Accessory Power Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
- Ignition OFF, disconnect the R1 RAP 1 relay.
- Test for less than 5 Ω between the ground circuit terminal 86 and ground.
- Connect a test lamp between the relay control circuit terminal 85 and ground.
- Cycle the ignition ON and OFF. The test lamp should turn ON and OFF when changing ignition switch positions.
- If all circuits test normal, test or replace the RAP relay.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM. |
| ⇒ | If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the BCM. |
Component Testing
- Ignition OFF, disconnect the R1 RAP 1 relay.
- Test for 70 - 150 Ω between the B+ terminal 85 and the ground terminal 86 of the relay.
- Test for infinite resistance between the following terminals:
- Install a 3 A fused jumper wire between relay terminal 85 and 12 V. Install a jumper wire between relay terminal 86 and ground. Test for less than 2 Ω between terminals 30 and 87.
| ⇒ | If not within the specified range, replace the relay. |
| • | 30 and 86 |
| • | 30 and 87 |
| • | 30 and 85 |
| • | 85 and 87 |
| ⇒ | If not the specified value, replace the relay. |
| ⇒ | If greater than the specified range, replace the relay. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for BCM replacement, setup, and programming.
