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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: 966 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.
P2135-62: Synchronization Error between Accelerator Pedal Sensor 1 and 2 – Signal Compare
Failure
Overview:
ISO Code
P2135-62
Customer Symptom
Vehicle /engine speed will be restricted
Fault Effects (On Vehicle)
1. Vehicle runs with speed limitation.
Lamp Status (If Any)
MIL ON after 1 drive cycle
Fault Detection Condition
This fault gets logged if plausibility failure is detected between Acc. Pedal
position Sensor 1 & 2. This fault gets logged only when vehicle is running.
Normal Operating Condition
Acc Pedal Position Sensor 1 & 2 gives correct input to EMS ECU.
Probable Trouble Area
Wiring harness Connections, Pedal Position Sensor 1/2 Faulty, EMS ECU
Healing Condition
Ignition and after 3 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