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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: 771 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.
P062D-29: Fuel Injector Driver Circuit Performance– Signal Invalid
Overview:
ISO Code
P062D-29
Customer Symptom
Vehicle /engine speed will be restricted
Fault Effects (On Vehicle)
1. Inactive driver gas pedal
2. Loss of torque via safety fuel cut off
Lamp Status (If Any)
CE Lamp ON after 1 drive cycle
Fault Detection Condition
This fault gets logged when there is short circuit between Acc. Pedal Position
Sensor 1 & 2 or loss of synchronization between two Acc pedal position sensor.
Normal Operating Condition
Acc Pedal Position Sensor A & B gives correct input to EMS ECU.
Probable Trouble Area
Wiring harness Connections, Pedal Position Sensor A/B Faulty, EMS ECU
Healing Condition
Ignition and after 1 drive cycles of fault rectification
Fault permanent deletion
1. Clear DTC Command form Scan tool
2. Stack Over Flow.
3. 40 warm up cycles.
4. ECU Flashing.
5. ECU Power-Fail
Component Details:
For safety reasons, the accelerator pedal Sensor is equipped with 2 resistors (potentiometers) with varying operating
ranges and separate circuits. A potentiometer informally a pot, is a three- terminal resistor with a sliding contact that
forms an adjustable voltage divider. If only two terminals are used, one end and the wiper, it acts as a
variable resistor
or
rheostat
.
Preliminary Checks:
1) Loose/ Damaged Connections between Pedal Sensor 1/2 and EMS ECU.
2) Check for back out of pins at both Pedal Sensor 1/2 connector and ECU connector.
3) Check for damage of pins at both Pedal Sensor 1/2 connector and ECU connector.
4) Check the continuity from Pedal Sensor 1/2 connector pins to the ECU pins.
5) Pedal Sensor 1/2 Faulty
6) EMS ECU faulty