Tire Pressure Monitoring System (TPMS) Function: Operation
WARNING: This page is about a different car, the 2015 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.
- The signals from the TPMS transmitter are received by the KOS-ECU or WCM (without KOS)
- KOS-ECU or (without KOS) or WCM processes input signals from each TPMS transmitter as well as vehicle speed signals from the ASC-ECU. It receives the atmospheric pressure signal from engine control module, and when the atmospheric pressure is low (such as at high altitude), it calibrates the tire pressure received from TPMS transmitter and makes a judgment of warning. When the road tire pressure is low, it sends a warning signal causing the TPMS warning light to be illuminated. When the TPMS has problems, it sends a warning signal causing the TPMS warning light to be flashed*.NOTE: Change to continuous illumination after flashing for about 1 minute.
- For 3 seconds after the engine switch is turned to the "ON" position, KOS-ECU or WCM (without KOS) illuminates the TPMS warning light to check any breaks in the TPMS warning light circuit.
- By connecting the scan tool (M.U.T.-III) to the data link connector, data stored in KOS-ECU or WCM (without KOS) (data of tire pressure and TPMS transmitter ID, the alarm status and warning history, etc.) can be displayed and TPMS transmitter ID can be registered.NOTE: If the TPMS transmitter is replaced, register the ID codes of all the TPMS transmitters again using the M.U.T.-III.