B2559

DTC B2559 Theater Dimming Ground Circuit Open:

DTC B2559 Theater Dimming Ground Circuit Open:

CIRCUIT DESCRIPTION
The BCM receives ground from circuit 1750 used for interior courtesy light operation.

CONDITIONS FOR SETTING THE DTC
^ The BCM detects an open in circuit 1750.
^ All conditions must be present for more than 0.3 seconds.

ACTION TAKEN WHEN THE DTC SETS
The BCM stores DTC B2559 in memory.

CONDITIONS FOR CLEARING THE DTC
^ The BCM detects ground in circuit 1750.
^ 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.
^ This DTC may set intermittently if the BCM is open internally.
^ 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 Computers and Control Systems for additional information on PCM related DTCs. Computers and Control Systems

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
2. This step checks for an open in circuit 1750.
3. This step determines whether the condition is intermittent or the BCM is faulty.