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

Courtesy of GENERAL MOTORS CORP.

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

Courtesy of GENERAL MOTORS CORP.

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

Courtesy of GENERAL MOTORS CORP.