Test Description

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

1. 2. The MAP sensor 5-volt reference circuit is shared with other sensors. If DTC P1635 is set, this indicates that the 5-volt reference circuit is shorted to ground and should be diagnosed first. The short may be on another sensor 5-volt reference circuit.
2. 4. Operate the vehicle within the same conditions as when the DTC failed. If you cannot duplicate the DTC, the information included in the Freeze Frame/Failure Records data can aid in locating an intermittent condition.

Fig 1: DTC P0107 (1 Of 2)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC P0107 (2 Of 2)

Courtesy of GENERAL MOTORS CORP.