GM Service Manual Online
For 1990-2009 cars only
ABS Reference Speed: Displays 0 to 255 km/h (0 to 159 mph). The vehicle speed from the average of all four wheel speeds.

Battery Volts: Displays 0 to 25.5 Volts. The battery voltage measured from the IPC battery positive terminal circuit to the IPC ground circuit.

Calibration ID: Displays the 4 digit calibration ID of the EBCM.

Check Tires: Displays Yes or No. The status of the TIM system; whether or not the tires should be checked for proper air pressure.

Ignition Voltage: Displays 0 to 17 Volts. The level of ignition voltage at the EBCM.

LF Wheel Speed: Displays 0 to 255 km/h (0 to 159 mph). The actual speed of the left front wheel.

LR Wheel Speed: Displays 0 to 255 km/h (0 to 159 mph). The actual speed of the left rear wheel.

PROM ID: Displays the 4 digit PROM ID of the control module.

RF Wheel Speed: Displays 0 to 255 km/h (0 to 159 mph). The actual speed of the right front wheel.

RR Wheel Speed: Displays 0 to 255 km/h (0 to 159 mph). The actual speed of the right rear wheel.

TIM Auto Learn Mode Active: Displays Yes or No. The status of the TIM learn mode.

TIM Failed: Displays Yes or No. The status of the TIM system. Indicates if the TIM is inactive due to a malfunction.

TIM Monitor Mode 1: Displays Yes or No. The status of the TIM mode 1 monitoring. The EBCM has limited detection capability for a low tire condition and has only partially learned the tire inflation configuration for the speed range.

TIM Monitor Mode 2: Displays Yes or No. The status of the TIM mode 2 monitoring. The EBCM has full detection capability for a low tire condition and has fully learned the tire inflation configuration for the speed range.

Tire Pressure Lamp: Displays On or Off. The command status of the systems monitor TIRE PRESS indicator.

Tire Reset Switch: Displays On or Off. The status of the tire inflation monitor reset switch.