B1802

DTC B1802 Courtesy Lamps Circuit Shorted To Ground:

DTC B1802 Courtesy Lamps Circuit Shorted To Ground (Part 1 Of 2):

DTC B1802 Courtesy Lamps Circuit Shorted To Ground (Part 2 Of 2):

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 a short to ground in circuit 1732.
^ The BCM is shorted to ground internally.
^ All conditions must be present for more than 0.1 seconds.

ACTION TAKEN WHEN THE DTC SETS
The BCM stores DTC B1802 in memory.

CONDITIONS FOR CLEARING THE DTC
^ Under all fault conditions, the ignition switch must be cycled from the LOCK or OFF position to the RUN position before this DTC can change from current to history.
^ The BCM no longer detects a short to ground in circuit 1732 when the ignition switch is in the RUN position.
^ 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
^ The following conditions may cause this malfunction to occur:
- Any of the courtesy lamps connected to circuit 1732 are shorted to ground.
- The BCM is shorted to ground internally.
^ 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. Checks for a short to ground in circuit 1732.
3. Determines whether the malfunction is intermittent or the BCM is faulty.