Tire Pressure Monitoring System (TPMS) 43 B. ON VEHICLE PROCEDURE 1. TPMS ECU Replacement Procedure Pre-checks / tasks to be done before replacing the ECU 1) After performing all the necessary checks as per the troubleshooting guide, at wire harness and if no root cause is found, then follow the below procedure. 2) Connect the diagnostic tool to OBD connector. 3) Turn the IGN ON using SSB / Key. Check on IPC whether it displays TPMS data or not. 4) If IPC displays either one/more of tire data incorrectly then check with TPMS sensor. e.g. Fill recommended tire pressure and check on IPC for correct data. If it is not updated then check Sensor. 5) If Sensor related fault is there then follow the procedure given in section 3.2. 6) Check the customer reported fault, whether it is rectified. 7) If the fault is rectified, disconnect the OBD connector and diagnostic tool. If step 7 (above) is NOT OK, i.e. fault is not rectified, follow the TPMS ECU replacement procedure given below. 2. ECU replacement procedure Prerequisite: 1) Gateway (Instrument Cluster) shall be functional. 2) TPMS Sensors with known sensor ID shall be available. 3) Latest vehicle configuration / parameter data shall be available on the server. 4) New TPMS ECU shall be available for replacement. NOTE It is not allowed to take TPMS ECU from another vehicle for replacement. Take a new ECU always. PROCEDURE 1) Disconnect the battery. 2) Move front passenger seat to the extreme rear side. 3) Remove Access cover. 4) Locate the TPMS ECU. 5) Remove the TPMS ECU connector. 6) Loosen and Remove the TPMS ECU from bracket. 7) Fix the new TPMS ECU on bracket. 8) Connect the TPMS ECU connector into their respective socket. 9) Ensure that connector is fitted tightly and properly.
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