B2588

DTC B2588

CIRCUIT DESCRIPTION
The body control module (BCM) turns ON the park lamp relay when the ambient light sensor senses a dark condition. Battery positive voltage is supplied to the park lamp relay at all times through the PARK fuse. The BCM grounds the park lamp relay control circuit in order to activate the relay.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B2588 Park Lamp Relay Control Circuit High

CONDITIONS FOR RUNNING THE DTC
- The ignition switch is in the RUN position.
- The headlamp switch is in the PARK or HEAD ON position.

CONDITIONS FOR SETTING THE DTC
The following condition will set this DTC:
The park lamp relay control circuit is shorted to voltage for 1 second.

ACTION TAKEN WHEN THE DTC SETS
The BCM turns off the park lamp relay control circuit for the remainder of the ignition cycle.

CONDITIONS FOR CLEARING THE DTC
- The BCM receives the clear code command from the scan tool.
- A current DTC will clear when the conditions for setting the DTC are no longer present.
- A history DTC clears after 100 malfunction free ignition cycles.

DIAGNOSTIC AIDS
If the DTC is a history DTC, the problem may be intermittent.

TEST DESCRIPTION

Step 1 - Step 6:

The number below refers to the step number on the diagnostic table.
2. Listen for an audible click when the park lamp relay operates. Command both the ON and OFF states. Repeat the commands, as necessary.