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DTC B2557 Passenger Compartment Lamp Control Circuit Low DTC B2558 Passenger Compartment Lamp Control Circuit High Conditions for Running the DTC The battery voltage must be between 9-16 volts. Conditions for Setting the DTC When the BCM receives a courtesy lamp illumination request signal and the inadvertent When the BCM is not receiving a courtesy lamp illumination request signal and the There is a loss of the underhood fuse block truck body controller (TBC) battery supply Action Taken When the DTC Sets The courtesy/dome lamps will not operate or are always ON. Conditions for Clearing the MIL/DTC This DTC will clear on current status after the condition for setting the fault is corrected. A history DTC will clear after 100 consecutive ignition cycles without a fault present. History and current DTCs can be cleared using a scan tool. Diagnostic Aids Perform a visual inspection for loose or poor connections at all related components. Refer to Test Description The numbers below refer to the step numbers on the diagnostic table. 2: This step determines if the problem exists in the wiring. 3: This step determines if a condition exist in the TBC battery voltage supply circuit. 5: After replacement of the BCM, you must calibrate the new module for proper operation. DTC B2557 or B2558 Step Action Yes No
2007 Hummer H3 2007 ACCESSORIES & EQUIPMENT Lighting - H3
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