Battery Voltage Signal: The scan tool displays 0-20 Volts. The scan tool displays the voltage as received on the battery positive voltage circuit of the body control module (BCM).

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.

GEN F-Terminal Signal: The scan tool displays 0-100%. The scan tool displays the percentage of the field current on the GEN F-Terminal circuit.

GEN L-Terminal Circuit Status: The scan tool displays Incomplete, Short Gnd / Open, Short to B+ or OK. The scan tool displays the status of the GEN L-terminal circuit.

GEN L-Terminal Command: The scan tool displays 0-100%. The scan tool displays the percentage of the GEN L-terminal signal.

Idle Boost Level: The scan tool displays amps. The scan tool displays the current engine idle boost level as commanded by the ECM.

Ignition 1 Signal: The scan tool displays 0-20 Volts. The scan tool displays the voltage as received on the ignition 1 circuit to the ECM.

Ignition Accessory Signal: The scan tool displays On and Off. The scan tool displays if the ignition 0 signal is On or Off.

Run/Crank Relay: The scan tool displays On or Off. The scan tool display actual state of the Run/Crank relay.

Run/Crank Relay Command: The scan tool displays On or Off. The scan tool displays the commanded state of the Run/Crank relay.

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

TR Sw.: The scan tool displays Park, Reverse, Neutral, Drive 5, Drive 4, Drive 3, Drive 2, Drive 1. The scan tool displays the position of the transmission range switch.