B2582

Diagnostic Chart (Part 1 Of 2):

Diagnostic Chart (Part 2 Of 2):

Refer to Headlamps Control
Circuit Description
The Body Control Module (BCM) monitors the signal circuit of the high beam indicator control for high beam activity. When the high beam headlamps are commanded on by the DRL relay or the headlamp dimmer switch the high beam indicator control circuit is pulled to ground. B+ is applied to the DRL relay and the LH high beam headlamp from the DRL/EXT fuse and the RH high beam headlamp receives B+ from the EXT fuse.

Conditions For Running The DTC
The headlamps are not on and the DRL is not enabled.

Conditions For Setting The DTC
^ The BCM detects a short to ground or open in the signal circuit of the high beam indicator control. When the headlamps are off and the DRL are off.
^ The condition above must be present for more than 0.3 seconds.

Action Taken When The DTC Sets
The BCM stores DTC B2582 in memory.

Conditions For Clearing The DTC
DTC B2582 will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.

Diagnostic Aids
^ If the DTC B2582 is a history DTC, the fault may be intermittent.
^ The following conditions may cause an intermittent malfunction to occur:
- An intermittent short to ground in the signal circuit of the high beam indicator control.
- An intermittent open in the signal circuit of the high beam indicator control.

Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
4. Test the DRL relay for a stuck switch.
5. Tests the headlamp dimmer switch for an internal short or bad switch.