B2617

CIRCUIT DESCRIPTION
The Body Control Module (BCM) controls the courtesy lamps through the courtesy lamp low control circuit. The BCM grounds the courtesy lamp low control circuit which completes the courtesy lamps ground circuit, and the courtesy lamps illuminate.

CONDITIONS FOR RUNNING THE DTC
The BCM must be commanding the theater dimming feature OFF.

CONDITIONS FOR SETTING THE DTC
^ The BCM detects that the output for the courtesy lamp low control circuit is low when it is expected to be high.
^ The condition above must be present for more than 0.3 seconds.

ACTION TAKEN WHEN THE DTC SETS
The BCM stores DTC B2617 in memory.

CONDITIONS FOR CLEARING THE DTC
^ A current DTC 2617 will clear if the short to ground or open in the courtesy lamp low control circuit is no longer detected by the BCM.
^ A history DTC B2617 will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present nor any other malfunction in the BCM is detected.
^ The BCM receives a clear code command from the scan tool.

DIAGNOSTIC AIDS
^ If the DTC B2617 is a history DTC, the fault may be intermittent. Refer to Testing for Intermittent and Poor Connections in Diagrams.
^ The following conditions may cause an intermittent malfunction to occur:
- An intermittent short to ground or open in the courtesy lamp low control circuit
- An intermittent open in the courtesy lamp supply voltage circuit
- The BCM is intermittently shorted to ground or open

TEST DESCRIPTION

Steps 1-10:

The numbers below refer to the step numbers on the diagnostic table.
2. Watch for the courtesy lamps to illuminate.
Command both the ON and OFF states. Repeat the commands as necessary.
4. Tests for voltage at the courtesy lamps.