Scan Tool Data Definitions

WARNING: This page is about a different car, the 2005 Buick LeSabre. However, it is still accessible from the selected car via links, so may be relevant.

ABS Reference Speed: The scan tool displays 0-255 km/h (0-159 mph). The vehicle speed from the average of all four wheel speeds.
Check Tires: The scan tool displays Yes or No. Yes indicates the TPM system has detected a low tire pressure and the tire pressures should be inspected. No indicates the Tire pressures are within specification.
Ignition Voltage: The scan tool displays 0-17 volts. The level of ignition voltage at the EBCM.
LF Wheel Speed: The scan tool displays 0-255 km/h (0-159 mph). The actual speed of the left front wheel.
LR Wheel Speed: The scan tool displays 0-255 km/h (0-159 mph). The actual speed of the left rear wheel.
RF Wheel Speed: The scan tool displays 0-255 km/h (0-159 mph). The actual speed of the right front wheel.
RR Wheel Speed: The scan tool displays 0-255 km/h (0-159 mph). The actual speed of the right rear wheel.
TIM Auto Learn Mode Active: The scan tool displays Yes or No. Yes indicates the TPM system is learning the tire pressure calibrations for the speed range the vehicle is in. No indicates the TPM system has learned the tire pressure calibrations for the speed range the vehicle is in.
TIM Failed: The scan tool displays Yes or No. Yes indicates the TPM system is disabled due to a malfunction detected within the system. No indicates the TPM system is operating to specification.
TIM Monitor Mode 1: The scan tool displays Yes or No. Yes indicates the TPM system is beginning to learn the initial half of the calibration process and has no tire pressure detection capability for the speed range the vehicle is in. No indicates the TPM system has partially completed the calibration process and has limited tire pressure detection capability for the speed range the vehicle is in.
TIM Monitor Mode 2: The scan tool displays Yes or No. Yes indicates the TPM system has completed the calibration process and has full tire pressure detection capability for the speed range the vehicle is in. No indicates the TPM system has only partially learned the final half of the tire pressure calibration and has limited tire pressure detection capability for the speed range the vehicle is in.