Gravitas FATC Gen 3 DTC Troubleshooting Data Version: 1.0 Date: 15-July-2023 Copyright © TATA MOTORS Ltd. This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author. Author: ERC Page: 191 of 301 2) If the values seen on the diagnostics tool in read ECU parameters is not getting updated then replace the sensor 3) If there is no continuity between the sensor connector & ECU connector then correct the wiring harness 4) If there is a continuity between the sensor signal and battery lines correct the wiring harness (wiring harness short to battery)1) Connect the sensor connector firmly 2) If the values seen on the diagnostics tool in read ECU parameters is not getting updated then replace the sensor 3) If there is no continuity between the sensor connector & ECU connector then correct the wiring harness 4) If there is a continuity between the sensor signal and battery lines correct the wiring harness (wiring harness short to battery)1) Connect the sensor connector firmly 2) If the values seen on the diagnostics tool in read ECU parameters is not getting updated then replace the sensor 3) If there is no continuity between the sensor connector & ECU connector then correct the wiring harness 4) If there is a continuity between the sensor signal and battery lines correct the wiring harness (wiring harness short to battery) Component Details: PTC sensor pic to be added PTC temp sensor is used to sense the temperature of PTCheater coil which gets used by CCM to control PTC heater for climate control. Preliminary Checks: 1.Switch On Ignition. Check sensor and its connector located at center position of lower case of the HVAC unit. 2.Read PTC sensor ECU parameter PTC Sensor Signal Input from the diagnostic tool Trouble Shooting:-
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