B2627

DTC B2627

CIRCUIT DESCRIPTION




The body control module (BCM) monitors the instrument panel (IP) lamps dimming control circuit to determine the lighting intensity of the IP lamps. When the BCM receives a varied voltage signal on the IP lamps dimming control circuit, it applies a corresponding pulse width modulated (PWM) voltage signal through the IP lamps supply voltage circuit to all the IP lamps.

CONDITIONS FOR RUNNING THE DTC
- Voltage supplied to the BCM is in the normal operating range, approximately 9-14 volts.
- The ignition switch must be in the ACCESSORY or RUN position.
- The park lamps must be on.

CONDITIONS FOR SETTING THE DTC
- The BCM detects a short to ground in the instrument panel lamp supply voltage circuit.
- The above condition must be present for more than 1 second.

ACTION TAKEN WHEN THE DTC SETS
- The I/P courtesy lamps are inoperative.
- The BCM store DTC B2627 in memory.

CONDITIONS FOR CLEARING THE MIL/DTC
- A current DTC B2627 clears when the BCM no longer detects a short to ground in the instrument panel lamps supply voltage circuit.
- A history DTC B2627 clears after 100 consecutive ignition cycles.

DIAGNOSTIC AIDS
- If the DTC B2627 is a history DTC, the fault may be intermittent.
- The following conditions may cause an intermittent malfunction to occur:
- An intermittent short to ground in the instrument panel lamps supply voltage circuit.
- The BCM is intermittently shorted to ground.

TEST

Steps 1-5: