B2628
CIRCUIT DESCRIPTIONThe BCM controls the illumination of the following lamps through pulse width modulation when the park lamps or the headlamps are ON:
^ The automatic transmission control position illumination lamp
^ The left glass window release switch illumination lamp
^ The electronic traction control switch illumination lamp
^ The door lock theft deterrent defeat switch illumination lamp
^ The heater A/C control switch illumination lamp
^ The instrument cluster illumination lamps
^ The headlamp switch illumination lamp
^ The radio switches illumination lamps
^ The driver information display switch illumination lamp
^ The heated seat switch illumination lamp
^ The door lock switches illumination lamps
^ The window switches illumination lamps
^ The steering wheel controls illumination lamps
CONDITIONS FOR RUNNING THE DTC
Voltage supplied to the module is in the normal operating range (approximately 10 - 16 volts).
CONDITIONS FOR SETTING THE DTC
^ The BCM detects a short to voltage in the instrument panel lamps supply voltage circuit. When the park lamps or the headlamps are on, and the dimmer switch is in the OFF position.
^ The condition is present for more than 3 ms.
ACTION TAKEN WHEN THE DTC SETS
The BCM stores DTC B2628 in memory.
CONDITIONS FOR CLEARING THE MIL/DTC
^ A current DTC B2628 clears if the BCM no longer detects a short to voltage in the instrument panel lamps supply voltage circuit of the illumination lamps.
^ A history DTC B2628 clears after 100 consecutive ignition cycles if the condition is no longer present.
^ The BCM receives the Clear Code command from the scan tool.
DIAGNOSTIC AIDS
^ If the DTC B2628 is a history DTC, the fault may be intermittent. Refer to Testing for Intermittent and Poor Connections in Diagnostic Aids.
^ An intermittent short to voltage in the following conditions may cause an intermittent malfunction to occur:
- The instrument panel lamps supply voltage circuit of the illumination lamps
- The BCM
TEST
