Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 511 of 834 Copyright by TATA MOTORS Ltd. This document must not be used in any w ay, such as copying and redistributing to third parties, w ithout our consent P1692-00: AC Blower Control Module Circuit High Overview: DTC Code P1692-00 DTC Description as per ISO Standard AC Blower Control Module Circuit High ECU Pin Number A37,A44,B88 Customer Symptom AC will not function and Blower will not get activated Fault Effects (On Vehicle) AC Compressor and Blower motor will not be engaged by EMS. Lamp Status (If Any) NA Fault Detection Condition This fault gets logged when either Blower position control module is not present or blower position input pin (A37) of EMS ECU is open circuited. Normal Operating Condition AC will function properly i.e. blower and AC compressor engagement will happen normally. Probable Trouble Area Wiring harness connections between EMS and AC Blower position detection module &EMS ECU. Healing Condition Clear the errors, Ignition OFF to ON, engine idle, fly-up and specially vehicle running in different speed condition, Blower and AC engagement for different position and fan speeds. Component Details: The working of blower motor is very simple and the airflow depends on effective voltage applied across its terminals. The blower motor fan pushes the cooled or heated air through the dashboard air vents to maintain the requested temperature of the passenger cabin, based on the position selection of the rotatory knob on dashboard and climate control settings. Resistance ladders are used to speed up & slow down the fan. In case of PWM control of blower motor by EMS ECU (Manual HVAC Nexon Vehicle only), the requested position of blower fan is sensed by Resistance ladder module and based on instant battery voltage and fan position selected, appropriate Duty cycle is provided to blower motor in order to maintain requested air flow. Preliminary Checks: Check whether the customer voice / view about the issue is matching with the fault effects mentioned above. If yes, go ahead with next steps. If not, check for other DTC’s presence. Check whether similar complaints are earlier reported. If yes, perform the preliminary checks with respect to earlier issue closure. AC Blower position module damaged or not present / its connector damaged? If so, rectify / replace Loose/ Damaged Connections between HVAC Panel, Blower position module and EMS ECU. Check for back out of pins at HVAC Panel, Blower position module and ECU connector. Check for damage of pins HVAC Panel, Blower position module and ECU connector. Trouble Shooting: Step Checks IF YES IF NO
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