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Nexon Gasoline – EMS ECU Bosch
DTC Troubleshooting Manual
Version: 0.1
Date: 26-08-2017
Prepared By: Sunu S Babu/Yogesh Jadhav
Checked By: Yeshwant Jadhav
Approved By: Satish Kumar
Document Part No: 2921 02 224 A1736
Page: 795 of 1203
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.
Counter Clockwise Operation – Circuit and Position feedback:
Standalone Diagnosis:
1. Connect variable power supply to the Throttle Actuator DC Motor pins XX and XX. Give 5V power supply to
Throttle Position Sensor supply pins xx,xx and connect ground to Sensor ground pins xx, xx.
2. Vary the supply voltage from 0 to 5 Volts and check whether the Throttle plate is moving in counter clockwise
direction.
3. Also measure the voltage at the Throttle position Sensor signal pins xx, xx. These voltage signals should vary
according to the graph shown in above snapshot.
Diagnosis
With ignition key is 'ON' position and supply voltage at 5V DC, use multimeter to measure the signal voltage at pin no.
2 and 3.
Signal Volt = 0.68 V DC at idle position.
Signal Volt = 4.25 ± 0.15V DC at wide Open
throttle (WOT) position.
Connector details :
1.
ECU pin M1A3 : Ground
2.
ECU pin M1B4 : Signal
3.
ECU pin M2C3 : 5V supply
Use diagnostic tester to check throttle Sensor by pressing and releasing the accelerator pedal.