GM Service Manual Online
For 1990-2009 cars only

Scan Tool Data Definitions Non HP2

Ignition 1 Signal: The scan tool displays the current voltage at the battery.

GEN L--Terminal Signal Command: The scan tool displays OK/No Output. The scan tool displays OK until malfunction is detected on the generator L terminal circuit, then it reads No Output.

GEN F--Terminal Signal: The scan tool displays 0-100%. The scan tool displays 0-5% until the engine is running, then the percentage value varies depending on electrical loads.

Scan Tool Data Definitions HP2

Aux. Power Outlets Status: The scan tool displays the actual of the auxiliary power outlet modes. Off, normal and continuous are the three available power modes.

Aux. Power Outlets Switch: The scan tool displays the actual switch position of pressed or released.

Aux. Power Outlets Target Idle Speed: The scan tool displays the actual target idle speed needed for proper APO operation.