Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2005COBALT L4-2.2L VIN FREPAIR AND DIAGNOSISSTARTING AND CHARGINGTESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESSCAN TOOL DATA DEFINITIONS
2005 Chevrolet Cobalt L4-2.2L VIN F
Scan Tool Data Definitions
2005 Chevrolet Cobalt L4-2.2L VIN FSECTION 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 powertrain control module (PCM) receives a signal from the generator then OK is displayed.
GEN L-Terminal Signal: 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/PCM.
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/PCM.
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.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.