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Home >> Chevrolet >> 2007 >> HHR L4-2.2L >> Repair and Diagnosis >> Starting and Charging >> Testing and Inspection >> Scan Tool Testing and Procedures >> Scan Tool Data Definitions
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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 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.
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