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 ECM receives a signal from the generator then OK is displayed.

GEN L-Terminal Signal Command
The scan tool displays On/Off. The scan tool displays Off until the engine is running, then the ECM supplies then the percentage value varies depending on electrical loads

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.

IMS
The scan tool displays Park, Park/Reverse, Reverse, Reverse/Neutral, Neutral, Neutral/Drive 4, Drive 4, Drive 4/Drive 3, Drive 3, Drive 3/Drive 2, Drive 2, Drive 2/Drive 1, Drive 1, INVALID, and OPEN. The scan tool displays the physical position of the Internal Mode Switch (IMS) of the transmission.

Starter Disabled
The scan tool displays Yes/No. The scan tool displays No unless vehicle theft deterrent has been activated then Yes is displayed.

Starter Enable Relay Circuit
The scan tool displays Fault/OK/Invalid State. The scan tool displays Fault until the ignition is placed into the START position then OK is displayed.

Starter Relay Command
The scan tool displays ON/OFF. The scan tool displays Off until the ignition is placed into the CRANK position, then it reads On.