Scan Tool Data Definitions

Scan Tool Data Definitions
Battery Voltage Signal
The scan tool displays 0 - 20 Volts. The scan tool displays the voltage as received by the module or the 72-08 battery voltage message from the body control module (BCM) over class 2 lines.
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 0 - 10% until the engine is started and the engine control module (ECM) receives a signal from the generator then OK is displayed.
GEN L-Terminal Signal Command
The scan tool displays Voltage/No Voltage. The scan tool displays Voltage until the engine is running, then displays No Voltage when the engine is running.
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. It will display On when in a remote start event.
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.