B2458

CIRCUIT DESCRIPTION
The body control module (BCM) controls the courtesy lamps theatre dimming. The BCM grounds the lamps directly. The ground will slowly reduce in order to turn the lamps to the OFF position. If there is a short to voltage condition in the interior lamp control circuit, DTC B2458 will set.

CONDITIONS FOR SETTING THE DTC
The BCM detects a short to voltage in the interior lamp control circuit for more than 0.15 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ Stores DTC B2458 in the BCM memory.
^ No driver warning message will be displayed for this DTC.

CONDITIONS FOR CLEARING THE DTC
^ A short to voltage is no longer detected by the BCM on the interior lamp control circuit.
^ A history DTC will clear after 50 consecutive ignition cycles if the condition for the fault is no longer present.

TEST DESCRIPTION

Steps 1-5:

The numbers below refer to the step numbers on the diagnostic table.
2. This step tests the interior lamp control circuit for a short to voltage.