GM Service Manual Online
For 1990-2009 cars only
Airbag Warning Lamp: The scan tool displays On/Off. The state of the air bag indicator as commanded by the IPC.

Analog Dim: The scan tool displays 0.1 to 13.6 V. The IPC uses the instrument panel dimming control circuit to determine the intensity of the electronic displays in the IPC.

Antilock Lamp: The scan tool displays On/Off. The state of the ABS indicator as commanded by the IPC.

Brake Warning Lamp: The scan tool displays On/Off. The state of the brake system indicator as commanded by the IPC.

Change Oil Lamp: The scan tool displays On/Off. The state of the CHANGE OIL SOON indicator as commanded by the IPC.

Cluster Part Number: The scan tool displays the 4 digit part number of the IPC.

Coolant Hot Lamp: The scan tool displays On/Off. The state of the engine coolant temperature indicator as commanded by the IPC.

Crank: The scan tool displays Active/Inactive. The IPC displays Active if it senses voltage at the crank voltage circuit.

Cruise Lamp: The scan tool displays On/Off. The state of the CRUISE indicator as commanded by the IPC.

Driver Door Switch: The scan tool displays Open/Closed. The BCM monitors the driver door ajar switch, where a closed switch is displayed as Open.

Door Ajar Lamp: The scan tool displays On/Off. The state of the DOOR/TRUNK indicator as commanded by the IPC.

ECT Sensor: The scan tool displays -40-151°C (-40-304°F). The PCM monitors the voltage at the signal circuit of the engine coolant temperature sensor. The voltage is inversely proportional to the engine coolant temperature.

Engine Oil Level Switch: The scan tool displays OK/Low. The PCM monitors the signal circuit of the engine oil level switch, where an open switch is displayed as Low (low engine oil level).

Engine Oil Life Remaining: The scan tool displays 0-100%. The PCM calculates the remaining engine oil life.

Engine Oil Pressure Switch: The scan tool displays OK/Low. The PCM monitors the signal circuit of the engine oil pressure switch, where an open switch is displayed as Low (low engine oil pressure).

Engine Speed: The scan tool displays 0-9999 RPM. Engine speed is computed by the PCM from the 3X reference input. It should remain close to desired idle under various engine loads with the engine idling.

English/Metric State: The scan tool displays English Units/Metric. The units are changed via the driver information center (DIC).

FEIC MODE: The scan tool displays On/Off. The state of the fuel efficiency information center (FEIC) mode switch. The scan tool displays On when the switch is depressed.

FEIC RESET:  The scan tool displays On/Off. The state of the fuel efficiency information center (FEIC) reset switch. The scan tool displays On when the switch is depressed.

Fuel Level: The scan tool displays 0-100%. The PCM calculates the amount of fuel remaining in the tank based on the input from the fuel level sensor. The IPC receives a class 2 message from the PCM indicating the fuel level percent.

Fuel Level Sensor: The scan tool displays 0-5 volts. The PCM monitors the signal circuit of the fuel level sensor.

Ignition 0: The scan tool displays Active/Inactive. The IPC displays Active if it senses voltage at the ignition 0 voltage circuit.

Ignition 0: The scan tool displays 0-16 volts. The voltage measured from the ignition 0 voltage circuit of the IPC.

Ignition 1: The scan tool displays Active/Inactive. The IPC displays Active if it senses voltage at the ignition 1 voltage circuit.

Julian Date of Build: The scan tool displays the 4 digit build date of the IPC.

Key In Ignition: The scan tool displays Yes/No. The BCM monitors the ignition key alarm switch, where a closed switch is displayed as Yes (key is in the ignition).

LCM Lights On Chime: The scan tool displays On/Off. The BCM monitors the headlamp switch, where an open switch is displayed as On (headlamp switch is in the off position).

Left Turn Signal: The scan tool displays Active/Inactive. The IPC monitors the left turn signal switch, where a closed switch is displayed as Active.

Location of Manufacture: The scan tool displays Metramoros/Flint/Delnosa. The scan tool displays the manufacture location of the IPC.

Low Coolant Input: The scan tool displays Active/Inactive. The IPC monitors the engine coolant indicator module, where a closed switch is displayed as Active (low coolant level).

Low Coolant Lamp: The scan tool displays On/Off. The state of the low engine coolant level indicator as commanded by the IPC.

Low Fuel Lamp: The scan tool displays On/Off. The state of the low fuel indicator as commanded by the IPC.

Low Oil Lamp: The scan tool displays On/Off. The state of the low engine oil level indicator as commanded by the IPC.

Low Tire Lamp: The scan tool displays On/Off. The state of the low tire indicator as commanded by the IPC.

Low Trac Lamp: The scan tool displays On/Off. The state of the LOW TRAC indicator as commanded by the IPC.

Low Wash Input: The scan tool displays Active/Inactive. The IPC monitors the windshield washer solvent level switch, where a closed switch is displayed as Active (low washer fluid).

Low Washer Lamp: The scan tool displays On/Off. The state of the LOW WASH indicator as commanded by the IPC.

Oil Pressure Lamp: The scan tool displays On/Off. The state of the engine oil pressure indicator as commanded by the IPC.

Park Brake Switch: The scan tool displays On/Off. The BCM monitors the park brake switch, where a closed switch is displayed as On.

Park Lamp: The scan tool displays Active/Inactive. The IPC monitors the headlamp switch, where a closed switch is displayed as Active (headlamp switch is in the park or head position).

PROM ID: The scan tool displays a 4 digit number that the identifies the PROM.

Right Turn Signal: The scan tool displays Active/Inactive. The IPC monitors the right turn signal switch, where a closed switch is displayed as Active.

Seat Belt Lamp: The scan tool displays On/Off. The state of the fasten safety belt indicator as commanded by the IPC.

Security Lamp: The scan tool displays On/Off. The state of the SECURITY indicator as commanded by the IPC.

Service Vehicle Soon Lamp: The scan tool displays On/Off. The state of the SERVICE VEHICLE SOON indicator as commanded by the IPC.

Software Release, Day: The scan tool displays the 2 digit number which corresponds to the day of the IPC software release.

Software Release, Month: The scan tool displays the 2 digit number which corresponds to the month of the IPC software release.

Software Release, Year: The scan tool displays the 2 digit number which corresponds to the year of the IPC software release.

Software Version: The scan tool displays the 2 digit number software version of the IPC.

Traction Off Lamp: The scan tool displays On/Off. The state of the TRAC OFF indicator as commanded by the IPC.

Vehicle Speed: The scan tool displays 0-100 mph. The IPC receives a class 2 message from the PCM indicating the vehicle speed.

Vehicle Speed Sensor: The scan tool displays 0-255 km/h (0-155 mph). The PCM monitors the voltage at the signal circuit of the vehicle speed sensor. The voltage is proportional to the vehicle speed.

Volt Lamp: The scan tool displays On/Off. The state of the charging system indicator as commanded by the IPC.