B1482

CIRCUIT DESCRIPTION
The Body Control Module (BCM) uses the courtesy lamps supply voltage circuit as a input circuit and a output circuit. When used as an output circuit the BCM provides battery power to the courtesy lamps. When used as a input circuit the BCM provides an interface to the electrical loads which are controlled by the BCM when the output is inactive. This will allow for determination of the ON/OFF status of the loads.

CONDITIONS FOR RUNNING THE DTC
If the voltage level at the BCM drops to 0.

CONDITIONS FOR SETTING THE DTC
^ The fault code sets when the BCM commanded state does not match the feedback. When the courtesy lamps supply voltage circuit is commanded high and a short to ground is present.
^ The fault code also sets when the battery positive voltage circuit that supplies the courtesy lamps supply voltage circuit is open or shorted to ground.
^ The condition above must be present for more than 0.1 seconds.

ACTION TAKEN WHEN THE DTC SETS
The BCM stores DTC B1482 in memory.

CONDITIONS FOR CLEARING THE MIL/DTC
^ A current DTC B1482 will clear if voltage is present on the battery positive voltage circuit and the BCM does not detect a short to ground.
^ A history DTC B1482 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 B1482 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 in the courtesy lamps supply voltage circuit.
- An intermittent open in the battery positive voltage circuit of the BCM that supplies the courtesy lamps supply voltage circuit.
- The BCM is intermittently shorted to ground.

TEST DESCRIPTION

Steps 1-8:

The number(s) below refer to the step number(s) on the diagnostic table.
3. Checks the battery positive voltage circuit at the BCM for an open or a short to ground.
4. Checks for a short to ground in the courtesy lamps supply voltage circuit.