Scan Tool Data Definitions

4WD Lamp: The scan tool displays On/Off. The state of the 4WD indicator as commanded by the instrument panel cluster (IPC). The IPC receives a class 2 message from the PCM when 4WD is engaged.

ABS Lamp: The scan tool displays On/Off. The state of the ABS indicator as commanded by the IPC. The IPC receives a class 2 message from the EBCM.

Annual Mileage: The scan tool displays 0.0 to 999999.9 miles (kilometers). The DIC determines annual mileage travelled from the 4kppm vehicle speed signal circuit from the PCM.

Battery : The scan tool displays On/Off. The state of the charge indicator as commanded by the IPC.

Battery Voltage: The scan tool displays the battery voltage as monitored by either the IPC or the BCM.

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

Business Trip Avg Speed: The scan tool displays 0.0 to 999.9 mph (km/h). The DIC monitors the vehicle speed on the PCM 4kppm vehicle speed signal circuit. The DIC calculates the average speed from the business trip distance and time.

Business Trip Fuel Used: The scan tool displays 0.0 to 9999.9 gallons (liters). The DIC receives a class 2 message from the PCM indicating the fuel used.

Business Trip Mileage: The scan tool displays 0.0 to 999999.9 miles (kilometers). The distance travelled is calculated by the DIC from the vehicle speed signal.

Business Trip Percent: The scan tool displays 0 to 100%. The DIC calculates the business trip percent of annual mileage from the sum total business mileage travelled and the annual mileage travelled.

Cargo Lamp On: The scan tool displays On/Off. The state of the cargo indicator as commanded by the IPC. The IPC receives a class 2 message from the BCM indicating the state of the cargo lamp switch.

Cargo Lamp Switch: The scan tool displays On/Off. The BCM monitors the state of the cargo lamp switch.

Change Engine Oil: The scan tool displays On/Off. The state of the change engine oil indicator in the message center as commanded by the IPC. The IPC receives a class 2 message from the PCM indicating the engine oil life.

Check Coolant Temp: The scan tool displays On/Off. The state of the check coolant temperature indicator in the message center as commanded by the IPC. The IPC receives a class 2 message from the PCM indicating the coolant temperature.

Check Engine Oil Level: The scan tool displays On/Off. The state of the check engine oil level indicator in the message center as commanded by the IPC. The IPC receives a class 2 message from the PCM indicating the engine oil level.

Check Engine Temp: The scan tool displays On/Off. The state of the check engine temperature indicator in the message center as commanded by the IPC. The IPC receives a class 2 message from the PCM indicating the engine temperature.

Cruise Control: The scan tool displays On/Off. The state of the cruise control indicator as commanded by the IPC. The IPC receives a class 2 message from the PCM indicating the state of the cruise control system.

Dimming: The scan tool displays Inactive/Active. The IPC monitors the dimming signal and displays Inactive when the dimming switch is off.

Display Fuel Switch: The scan tool displays On/Off. This is the state of the DIC fuel button where a closed switch is displayed as On..

Displayed Coolant Temp: The scan tool displays 32-127°C (89-260°F). This is the displayed coolant temperature gauge value in the IPC. This data may differ from the monitored coolant temperature in the PCM.

Displayed Fuel Level: The scan tool displays 0-100%. This is the displayed fuel gauge value in the IPC. This value may differ from the monitored fuel level in the PCM.

Displayed Odometer: The scan tool displays 0-999999 km (miles). This is the displayed odometer value in the IPC.

Displayed Trans Oil Temp: The scan tool displays 29-157°C (84-315°F). This is the displayed transmission oil temperature gauge value in the IPC. This value may differ from the monitored trans oil temperature from the PCM.

Displayed Trip Odometer: The scan tool displays 9999.9 km (miles). This is the displayed trip odometer value in the IPC.

Driver Door Jamb Switches: The scan tool displays Active/Inactive. This is the state of the driver door jamb switch, where a closed switch (door is open) is displayed as Active.

ECT: The scan tool displays -39 to +140°C (-38 to +284°F). This is the engine coolant temperature as monitored by the PCM.

Elapsed Time: The scan tool displays 00 to 99 hours. The DIC begins to calculate elapsed time when Elapsed Time is displayed on the DIC and the RESET button is pressed.

Elapsed Time: The scan tool displays 00 to 59 minutes. The DIC begins to calculate elapsed time when Elapsed Time is displayed on the DIC and the RESET button is pressed.

Elapsed Time: The scan tool displays 00 to 59 seconds. The DIC begins to calculate elapsed time when Elapsed Time is displayed on the DIC and the RESET button is pressed.

Engine Oil Level Switch: The scan tool displays Ok/Low. This is the state of the engine oil level switch as monitored by the PCM.

Engine Oil Life Remaining: The scan tool displays 0 to 100%. This is the engine oil life index that is calculated and maintained by the PCM.

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.

Engine Speed: The scan tool displays 0-9999 RPM. The IPC receives the engine speed from the PCM via the engine speed signal circuit.

Fasten Seat Belt: The scan tool displays On/Off. The state of the fasten seat belt indicator as commanded by the IPC. The IPC receives a class 2 message from the BCM indicating the seat belt switch status.

Fuel Level Sensor: The scan tool displays 0 to 5 Volts. The PCM monitors the fuel level sensor signal where 0 V is empty tank.

Fuel Level Sensor: The scan tool displays 0 to 100%. The PCM monitors the fuel level sensor signal circuit to determine the fuel level percent.

Fuel Level Sensor Rear: The scan tool displays 0 to 5 Volts. The PCM monitors the rear tank fuel level sensor signal where 0 V is empty tank.

Fuel Tank Level Remaining: The scan tool displays gallons (liters). This is the amount of fuel remaining in the fuel tank as determined by the PCM.

Fuel Tank Level Remaining: The scan tool displays 0 to 100%. The scan tool displays in percentage the amount of fuel remaining in the fuel tank as determined by the PCM.

Hi Beam Lamp: The scan tool displays On/Off. The state of the high beam indicator as commanded by the IPC. The IPC receives a class 2 message from the BCM indicating the status of the high beam.

High Beam Switch: The scan tool displays On/Off. The position of the high beam switch, where an activated switch is displayed as On.

Hourmeter: The scan tool displays 0 to 10,000 hours. This is the PCM accumulated engine run time hours provided to the IPC via the class 2 serial data link.

Ignition 1: The scan tool displays the position of the ignition switch. The scan tool displays Active when the ignition switch is in the RUN or CRANK position

Ignition 3: The scan tool displays the position of the ignition switch. The scan tool displays Active when the ignition switch is in the RUN position only.

Ignition 1 Signal: The scan tool displays 0 to 16 V. The ignition 1 signal represents the system voltage detected by the PCM at the ignition voltage circuit.

Ignition Voltage: The scan tool displays the ignition voltage as monitored by the DIC.

Illumination Input Voltage: The scan tool displays 9 to 16 V. The illumination input voltage is the ignition monitored voltage at the instrument panel lamp supply voltage circuit at the DIC.

Key In Ignition: The scan tool displays Yes/No. This is the position of the ignition key in the ignition switch cylinder as monitored by the BCM. The scantool displays Yes when the ignition key is fully inserted into the ignition switch cylinder.

Left Turn Signal: The scan tool displays On/Off. The scan tool displays On when the left turn signal switch is activated.

Low Coolant: The scan tool displays On/Off. This is the state of the low coolant as commanded by the IPC. The IPC receives a class 2 message from the PCM indicating the coolant level.

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

Low Washer Fluid: The scan tool displays On/Off. The IPC monitors the windshield washer solvent level switch where a closed switch is displayed as On.

Menu Switch: The scan tool displays On/Off. The DIC monitors the menu button where a closed switch is displayed as On.

MIL Command: The scan tool displays On/Off. This is the commanded state of the malfunction indicator lamp (MIL) by the PCM.

Module Part Number: The scan tool displays the GM 8-digit part number of the IPC.

Monitored Coolant Temp: The scan tool displays -40°F to +419°F (-40°C to +215°C). This is the PCM monitored coolant temperature data as provided to the IPC via the class 2 serial data link.

Monitored Fuel Level: The scan tool displays 0-100%. This is the PCM monitored fuel level percent as provided to the IPC via the class 2 serial data link.

Monitored Fuel Level: The scan tool displays 0-100%. This is the PCM monitored fuel level percent as provided to the DIC via the class 2 serial data link.

Monitored Trans Oil Temp: The scan tool displays -40°F to +419°F (-40°C to +215°C). This is the PCM monitored transmission oil temperature data as provided to the IPC via the class 2 serial data link.

Odo/Trip Switch: The scan tool displays On/Off. The DIC monitors the Odo/Trip button where a closed switch is displayed as On.

Oil Pressure Lamp: The scan tool displays On/Off. The state of the oil pressure indicator in the message center as commanded by the IPC. The IPC monitors the engine oil pressure sensor signal.

On/Off Switch: The scan tool displays On/Off. The DIC monitors the On/Off switch where a closed switch is displayed as On.

Overspeed Lamp: The scan tool displays On/Off. The state of the overspeed indicator as commanded by the IPC in the message center. IPC receives a class 2 message from the BCM indicating the vehicle overspeed status.

Park Brake Switch: The scan tool displays Set/Released. The BCM monitors the park brake signal circuit where a closed switch is displayed as set and the park brake pedal depressed.

Park Switch: The scan tool displays Open/Closed. When the gearshift lever is in the park position Closed is displayed.

Personal Trip Avg Speed: The scan tool displays 0.0 to 999.9 mph (km/h). The DIC obtains the vehicle speed from the PCM 4kppm vehicle speed signal circuit. The DIC calculates the average speed from the personal trip distance and time.

Personal Trip Fuel Used: The scan tool displays 0.0 to 9999.9 Gallons (liters). The DIC receives a class 2 message from the PCM indicating the fuel used.

Personal Trip Mileage: The scan tool displays 0.0 to 999999.9 miles (kilometers). The distance travelled is determined using the 4kppm vehicle speed signal circuit from the PCM.

Personal Trip Percent: The scan tool displays 0 to 100%. The DIC calculates the personal trip percent of annual mileage from the total personal mileage travelled and the annual mileage travelled.

PRNDL State: The scan tool displays the PRNDL range of the vehicle. The state of the PRNDL range as communicated to the IPC by the PCM.

RAP Relay Feedback: The scan tool displays On/Off. The state of the RAP relay as commanded by the BCM.

Real Time Clock Day: The scan tool displays a value range of 1 to 31 days indicating the current day of the DIC real time clock.

Real Time Clock Hours: The scan tool displays a value range of 1 to 12 hours indicating the current hour of the DIC real time clock.

Real Time Clock Minutes: The scan tool displays a value range of 00 to 59 minutes indicating the current minute of the DIC real time clock.

Real Time Clock Month: The scan tool displays all calendar months indicating the current month of the DIC real time clock.

Real Time Clock Seconds: The scan tool displays a value range of 00 to 59 seconds indicating the current second of the DIC real time clock.

Real Time Clock Year: The scan tool displays a value range of 00 to 99 years indicating the current year of the DIC real time clock.

Reduced Engine Power: The scan tool displays Active/Inactive. The state of the REDUCED ENGINE POWER indicator as commanded by the IPC in the message center. The IPC receives a class 2 message from the PCM indicating reduced engine power.

Reset Switch: The scan tool displays On/Off. The DIC monitors the Reset button where a closed switch is displayed as On.

Right Arrow Switch: The scan tool displays On/Off. The DIC monitors the Right Arrow button where a closed switch is displayed as On.

Right Turn Signal: The scan tool displays On/Off. The scan tool displays On when the right turn signal switch is activated.

Run/Accy/Rap Voltage: The scan tool displays volts. The DIC monitors the Run/Accy/Rap voltage circuit.

Seat Belt Buckled: The scan tool displays Yes/No. This is the state of the driver seat belt as monitored by the BCM, where a buckled seat belt is displayed as On.

Security Lamp: The scan tool displays On/Off. The state of the security indicator as commanded by the IPC in the message center. The IPC receives a class 2 message from the BCM .

Security Lamp State: The scan tool displays On/Off/Flashing. This is the state of the security lamp as commanded by the BCM.

Service 4WD: The scan tool displays On/Off. The state of the service 4WD indicator as commanded by the IPC in the message center. The IPC receives a class 2 message from the automatic transfer case module.

Service Throttle Soon: The scan tool displays On/Off. The state of the service throttle soon indicator as commanded by the IPC in the message center. The IPC receives a class 2 message from the PCM.

Tow/Haul: The scan tool displays On/Off. The state of the tow/haul indicator as commanded by the IPC in the message center. The IPC receives a class 2 message from the BCM.

Trans Fluid Hot: The scan tool displays On/Off. The state of trans fluid hot indicator as commanded by the IPC in the message center. The IPC receives a class 2 message from the PCM.

Trans. Hot...Idle Eng: The scan tool displays On/Off. The state of the Trans Hot...Idle Eng indicator in the message center as commanded by the IPC. The IPC receives a class 2 message from the PCM.

Trip Reset Switch: The scan tool displays On/Off. The IPC monitors the trip reset switch where a closed switch is displayed as On.

Upshift Lamp: The scan tool displays On/Off. The state of the upshift lamp as commanded by the IPC. The cluster receives a class 2 message from the PCM.

Vehicle Speed: The scan tool displays 0 to 159 mph (0 to 255 km/h). The BCM receives the vehicle speed information from the PCM 4kppm vehicle speed signal circuit.

Vehicle Speed: The scan tool displays 0 to 159 mph (0 to 255 km/h). The DIC receives the vehicle speed information from the PCM 4kppm vehicle speed signal circuit.

Vehicle Speed: The scan tool displays 0 to 159 mph (0 to 255 km/h). The IPC receives the vehicle speed from the PCM via the vehicle speed signal circuit.

Vehicle Speed: The scan tool display miles per hour (kilometers per hour). The PCM calculates the vehicle speed from VSS signal.

Wait to Start: The scan tool displays On/Off. The Wait to Start indicator as commanded by the IPC in the message center.

Water in Fuel: The scan tool displays On/Off. The state of the Water in Fuel indicator in the message center as commanded by the IPC. The IPC receives a class 2 message from the PCM.