October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Pin Voltage Charts

Following conditions must be met before testing:

Engine at operating temperature.
Engine in closed loop operation.
Engine idling (ENG. "RUN" column).
DLC "test" terminal not grounded.
Scan tester not installed.
Brake not applied.
B+ indicates battery voltage.

Fig 1: PCM Connector Terminal "A-B" (Red) - VINS L & 1

G94J32473

Courtesy of GENERAL MOTORS CORP.

Fig 2: PCM Connector Terminal "C-D" (White) - VINS L & 1

G50D17502

Courtesy of GENERAL MOTORS CORP.

Fig 3: PCM Connector Terminal "E-F" (Blue) - VINS L & 1

G50C17501

Courtesy of GENERAL MOTORS CORP.