Scan Tool Data Definitions

Balance: The scan tool displays 0-100%. The amount of left to right balance selected.
Battery Voltage: The scan tool displays 0-19 volts. The voltage measured at the battery positive voltage circuit of the instrument panel cluster (IPC).
Battery Voltage: The scan tool displays 0-19 volts. The battery voltage as monitored by the Radio.
Battery Voltage Signal: The scan tool displays 0-19 volts. The battery voltage as monitored by the body control module (BCM).
Cargo Lamp Switch: The scan tool displays On or Off. The BCM monitors the signal circuit of the cargo lamp switch. A closed switch is displayed as On.
Courtesy Lamp Relay: The scan tool displays the commanded state of the courtesy lamp relay. The scan tool displays On when the BCM allows the courtesy lamp relay to go to ground to activate the courtesy lamps.
Courtesy Lamp Switch: The scan tool displays On or Off. The BCM monitors the signal circuit of the courtesy lamp switch. A closed switch is displayed as On.
Displayed Fuel Level: The scan tool displays 0-100%. The displayed fuel gage value in the IPC. This value may slightly differ from the monitored fuel level.
Driver Door Ajar Switch: The scan tool displays On or Off. The BCM monitors the signal circuit of the driver door ajar switch. An open switch is displayed as On with the door open.
Driver Seatbelt: The scan tool displays Unbuckled or Buckled. The state of the fasten safety belt indicator as commanded by the BCM.
ECT Sensor: The scan tool displays -40 to +151°C (-40 to +304°F). The powertrain control module (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 Coolant Temperature: The scan tool displays 38°C-128°C (100°F-260°F). The displayed coolant temperature gage value in the IPC. This value may slightly differ from the monitored coolant temperature.
Engine Oil Level Switch: The scan tool displays OK or Low. The PCM monitors the signal circuit of the engine oil level and temperature sensor. A closed switch is displayed as Low with low engine oil level.
Engine Oil Pressure Switch: The scan tool displays OK or Low. The PCM monitors the signal circuit of the engine oil pressure switch. A closed switch is displayed as Low with low engine oil pressure.
Engine Speed: The scan tool displays 0-9999 RPM. The IPC monitors the engine speed signal circuit from the PCM.
Engine Speed: The scan tool displays 0-9999 RPM. The PCM computes the engine speed. It should remain close to desired idle under various engine loads with the engine idling.
Fade: The scan tool displays 0-252 counts. The amount of front to rear fade selected.
Fuel Level: The scan tool displays 0-100%. The IPC calculates the amount of fuel remaining in the tank based on the input from the PCM.
Fuel Level Sensor: The scan tool displays 0-5 volts. The PCM calculates the amount of fuel remaining in the tank based on the input from the fuel level sensor.
Fuel Level Sensor: 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.
Hazard Lamp Switch: The scan tool displays Active or Inactive. The BCM monitors the hazard lamp switch circuit. When the hazard switch is turned Off the signal is displayed as Inactive.
Headlamp Off Switch: The scan tool displays Active or Inactive. The BCM monitors the signal circuit of the headlamp Off switch. A closed switch is displayed as Active.
Headlamp On Switch: The scan tool displays On or Off. The BCM monitors the signal circuit of the headlamp on switch. A closed switch is displayed as On.
Headlamp Relay: The scan tool displays On or Off. This is the state of the headlamp and the panel dimmer switch. The scan tool displays On when the headlamp and the panel dimmer switch is turned On or in auto position with the ambient light sensor in its dark state.
High Beam Indicator Command: The scan tool displays On or Off. This is the state of the high beam indicator as commanded by the IPC.
High Beam Select Switch: The scan tool displays Active or Inactive. The BCM monitors the high beam select switch circuit. When the high beam select switch is turned On the signal is displayed as Active.
Ignition 1 Signal: The scan tool displays 0-19 volts. The voltage measured at the ignition 1 voltage circuit of the PCM.
Ignition Accessory: The scan tool displays Active or Inactive. The BCM monitors the position of the ignition switch. Active is displayed when the ignition switch is in the Run or ACCY position.
Ignition Off/Run/Crank: The scan tool displays Active or Inactive. The BCM monitors the signal circuit of the key in ignition switch. A closed switch is displayed as Active with the key in the ignition.
Ignition 1 Run/Crank: The scan tool displays Active or Inactive. The BCM monitors the position of the ignition switch. Active is displayed when the ignition switch is in the Run or CRANK position.
LF Turn/Hazard Lamp Command: The scan tool displays On or Off. This is the state of the left front turn lamp as commanded by the BCM.
LR Turn/Hazard Lamp Command: The scan tool displays On or Off. This is the state of the left rear turn lamp as commanded by the BCM.
MIL (Malfunction Indicator Lamp) Command: The scan tool displays On or Off. This is the commanded state of the malfunction indicator lamp (MIL) by the PCM.
Park Brake Switch: The scan tool displays Set or Released. The BCM monitors the signal circuit of the park brake switch. A closed switch is displayed as Set.
Park Lamp Switch: The scan tool displays Active or Inactive. The BCM monitors the signal circuit of the parklamp switch. A closed switch is displayed as Active.
Passenger Door Ajar Switch: The scan tool displays On or Off. The BCM monitors the signal circuit of the passenger door ajar switch. An open switch is displayed as On with the door open.
PRNDL Switch: The scan tool displays Park, Reverse, Neutral, Drive, 1st, 2nd or 3rd. The state of the PRNDL as commanded by the IPC.
Reduced Engine Power: The scan tool displays Inactive or Active. This is the state of the Reduced Engine Power indicator as monitored by the PCM.
RF Turn/Hazard Lamp Command: The scan tool displays On or Off. This is the state of the right front turn lamp as commanded by the BCM.
RR Turn/Hazard Lamp Command: The scan tool displays On or Off. This is the state of the right rear turn lamp as commanded by the BCM.
Trip Odometer: The scan tool displays miles. The IPC calculates trip odometer information from the vehicle speed data received from the PCM.
Trip Reset Switch: The scan tool displays Active or Inactive. The IPC monitors the control stem on the cluster. A closed switch is displayed as Active.
Vehicle Speed: The scan tool displays 0-255 km/h (0-155 mph). The IPC monitors the vehicle speed signal circuit from the PCM.
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.
Volume: The scan tool displays 0-100%. The volume selected.