B2600

CIRCUIT DESCRIPTION
The Daytime Running Lamps (DRL) are controlled by the Body Control Module (BCM). The BCM grounds the DRL relay control circuit in order to energize the DRL relay coil. This action places the RH and LH headlamps in series with each other with the DRL relay providing the ground path and the RT HDLP fuse providing battery positive voltage. The BCM monitors the low and high beam circuits to ensure that the DRLs are operating properly. If the BCM senses that the DRLs are not operating properly, DTC B2600 is set.

CONDITIONS FOR RUNNING THE DTCS
^ The ignition switch is in the ON position.
^ The headlamp switch is OFF.
^ The park brake is unapplied.
^ The transaxle is in gear.

CONDITIONS FOR SETTING THE DTC
One or more of the following conditions are present:
^ The headlamp high beam signal circuit is open.
^ The headlamp low beam signal circuit is open.
^ The right headlamp battery positive voltage circuit is open.
^ The left headlamp battery positive voltage circuit is open.

ACTION TAKEN WHEN THE DTC SETS
^ The BCM turns off the DRL relay control for the remainder of the ignition cycle.
^ The SERVICE indicator lights.

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

DIAGNOSTIC AIDS
^ Check both the LH and RH headlamps for proper operation.
^ Check both the LH and RH HEADLAMP fuses.
^ If the DTC is a history DTC, the problem may be intermittent. Refer to Diagnostic Aids for Circuit Testing and Wiring Repair procedures.

TEST

Steps 1-9: