B2618

Power Grounds Key-In Ignition Switch:

Serial Data, DRL:

DTC B2618 Pass Compartment Dimming #2 Circuit High:

CIRCUIT DESCRIPTION
The BCM controls the ground of the courtesy lamp relay on CKT 690. The BCM will ground the relay and turn ON the courtesy lamp if the following conditions exist:
^ The BCM receives a signal from a mini-wedge (door jamb) switch.
^ The BCM receives an RFA signal to unlock the doors from the remote control door lock receiver module.
^ The dome lamp switch is turned ON.

CONDITIONS FOR SETTING THE DTC
To set B2618, the following conditions must be present:
^ Courtesy lamps ON.
^ CKT 690 is shorted to battery voltage.
^ The system voltage must be between 9.0-16.0 volts.
^ The above conditions must be met for 0.5 seconds.

ACTION TAKEN WHEN THE DTC SETS
The courtesy lights will not function.

CONDITIONS FOR CLEARING THE MIL/DTC
^ This DTC will clear after a fault free courtesy lamp operation.
^ A history DTC will clear after 100 consecutive ignition cycles without a fault present.
^ Use a scan tool in order to clear history and current DTCs.

DIAGNOSTIC AIDS

IMPORTANT: Use the appropriate probe from the J 35616-A connector test adapter kit for any probing of the Bussed Electrical Centers (BECs) in this table in order to avoid damage to the BECs.

^ Always perform the first DTC listed on the scan tool if more than 1 is displayed.
^ The scan tool must display DTC B2616 as a current code before performing diagnostics.
^ Perform a visual inspection for loose or poor connections at all related components
^ Refer to Intermittents and Poor Connections in Diagrams.

TEST DESCRIPTION
Number(s) below refer to the step number(s) on the Diagnostic Table.
2. This step tests for a short to battery voltage in CKT 690.
3. This step inspects the courtesy lamp relay. By disconnecting the BCM connector, other DTCs will set.