B1802

Diagnostic Trouble Code (DTC) Chart:

Wiring Schematic:

CIRCUIT DESCRIPTION
The 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.
^ All conditions must be present for more than 0.1 seconds.

ACTIONS 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 off to on 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 on.
^ 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 on with the Body Control module (BCM) disconnected. When BCM diagnostics and repairs are completed, refer to A Powertrain On Board Diagnostic (OBD) System Check for additional information on PCM related DTCs in Computers and Control Systems Testing.

TEST DESCRIPTION
The number(s) below refer to the step number(s) 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.