Scan Tool Data Definitions

WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

8-Digit GM Part Number: The scan tool displays the GM part number of the BCM.

ABS Warning Lamp: The scan tool displays On/Off. The status of the ABS indicator as commanded by the EBCM.

Brake Warning Lamp: The scan tool displays On/Off. The status of the BRAKE indicator as commanded by the DRL control module.

Driver Side Belt Status: The scan tool displays Buckled/Unbuckled. The state of the fasten safety belt indicator as commanded by the multifunction alarm module (MFAM). The MFAM monitors the signal circuit of the seat belt switch. A closed switch is displayed as Unbuckled.

ECT Sensor: The scan tool displays -40 to +151°C (-40 to +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 Speed: The scan tool displays 0-9999 RPM. The PCM monitors the signal circuit of the crankshaft position (CKP) sensor.

Fuel Tank Level Remaining: The scan tool displays 0-100%. The PCM monitors the fuel level sensor signal circuit in order to calculate the amount of fuel remaining in the fuel tank.

Fuel Tank Level Remaining: The scan tool displays 0-208 L (0-55 gallons). The PCM monitors the fuel level sensor signal circuit in order to calculate the amount of fuel remaining in the tank.

Fuel Level Sensor: The scan tool displays 0-5 volts. The PCM monitors the voltage of fuel level sensor signal circuit. A low fuel level is displayed as low voltage.

Ignition Voltage: The scan tool displays 0-25 volts. The BCM monitors the voltage of the ignition 1 input.

Security Lamp: The scan tool displays On/Off. The status of the Security Lamp indicator as commanded by the passlock module.

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.