B0812

DTC B0812 Battery Feed Courtesy Lamps Circuit Open:

CIRCUIT DESCRIPTION
The Body Control Module (BCM) uses the voltage in circuit 240 to power the courtesy lights through circuit 1732. The BCM controls the power supplied in circuit 1732 for inadvertent load (battery rundown) protection.

CONDITIONS FOR SETTING THE DTC
^ The BCM detects an open in circuit 240.
^ The BCM is open internally.
^ All conditions must be present for more than 0.3 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The BCM stores DTC B0812 in memory.
^ The BCM turns off its output to the theatre dimming 1 and 2.

CONDITIONS FOR CLEARING THE DTC
^ The BCM detects B+ in circuit 240.
^ A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.
^ Using a scan tool.

DIAGNOSTIC AIDS
^ If the DTC is a history DTC, the problem may be intermittent. Try performing the tests shown while moving wiring and connectors, this can often cause the malfunction to reappear.
^ DTC P1626 will set in the Powertrain Control Module (PCM) when the ignition switch is in the RUN position with the BCM disconnected. When BCM diagnostics and repairs are completed, refer to the Engine Controls for additional information on PCM related DTCs. Powertrain Management

TEST DESCRIPTION
Numbers below refer to the step numbers on the diagnostic table.
2. Check if BCM DTC B0812 has also set. If circuit 240 is shorted to ground, circuit 240 will be open.
4. Checks for an open in circuit 240.
5. Determines whether the condition is intermittent or the BCM is faulty.