Test Description

WARNING: This page is about a different car, the 2002 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

2. The normal operating voltage of the photocell is 0.5-4.5 volts.
3. If the value is above 0.5 volts, with the sensor disconnected, a short to voltage exists. If the value is below 0.5 volts, a short to ground exists.

Fig 1: DTC B2648 (1 Of 2)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC B2648 (2 Of 2)

Courtesy of GENERAL MOTORS CORP.