GM Service Manual Online
For 1990-2009 cars only
Crank Request Signal: The scan tool displays Yes/No. The scan tool displays No until the ignition is placed into the START position, then Yes is displayed.

Generator L Terminal Signal Command: The scan tool displays On/Off. The scan tool displays Off until the engine is running, at which time it will display On.

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

Ignition 1 Signal: The scan tool displays system voltage received by the module.

PNP Switch : The scan tool displays Park/Neutral or In Gear. The scan tool displays the position of the PNP switch.

Starter Relay Circuit Status : The scan tool displays Incomplete, Short Gnd/Open, Short to B+ or OK. The scan tool displays the status of the starter relay circuit.

Starter Relay Command: The scan tool displays Off/On. The scan tool displays Off until engine start has been requested, then it displays On.

TR Sw: The scan tool displays Park, Reverse, Neutral, Drive 5, Drive 4, Drive 3, Drive  and Drive 1. The scan tool displays the position of the transmission range switch.

Loading…
Loading the web debug toolbar…
Attempt #