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 B2585 00: Left Parklamp Control CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Park Lamp Relay Control | 2 | 1 | B2585 00 | -- |
1. Park Lamps Inoperative 2. Park Lamps Always On | ||||
Circuit/System Description
Battery positive voltage is supplied to the PRK LAMP relay at all times. The body control module (BCM) grounds the park lamp relay control circuit in order to activate the relay. With the park lamp relay activated, voltage is supplied to the park lamp control circuit illuminating the park lamps, license lamps, and marker lamps.
Conditions for Running the DTC
| • | The ignition switch is in the RUN position. |
| • | The ambient light sensor senses a dark condition, automatic lamp control (ALC) park lamps ON, or the headlamp switch is in the park or head ON position. |
Conditions for Setting the DTC
The park lamp control circuit is shorted to voltage.
Action Taken When the DTC Sets
The park lamps are inoperative.
Conditions for Clearing the DTC
100 consecutive ignition cycles have been recorded without the DTC being detected.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Exterior Lighting Systems Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, command the park lamps ON and OFF with a scan tool, observe the operation of park lamps. The park lamps should turn ON and OFF with each command.
Circuit/System Testing
- Ignition OFF, disconnect the PRK LAMP relay.
- Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 86 and ground.
- If all circuits test normal, replace the BCM.
| ⇒ | If the test lamp illuminates, test the control circuit for a short to voltage. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming |
