B2628

DTC B2628

CIRCUIT DESCRIPTION
The 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 battery positive 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.
- 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

Steps 1-6: