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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: 409 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.
P0261-11: Cylinder 1 Injector Circuit Low– Circuit Short to Ground
Overview:
ISO Code
P0261-11
Customer Symptom
Engine might Stall, Vehicle Acceleration poor, Idle not stable, Poor start
ability, Lambda control deactivated.
Fault Effects (On Vehicle)
1. Vehicle acceleration is poor.
2. Idle is not stable.
3. Lambda control is not active.
4. Engine may get flooded and exhaust may get red hot resulting damage to
the catalytic converter.
5. Poor start ability.
Lamp Status (If Any)
MIL ON after 1 drive cycle
Fault Detection Condition
This fault gets logged if the ignition state is ON and Injector of cylinder 1
control pin is Short Circuited to Ground.
Normal Operating Condition
Proper Wiring Harness connections between Injector of cylinder 1 and EMS
ecu.
Probable Trouble Area
Wiring Harness Connections
Healing Condition
Ignition ON and 3 driving Cycles
Component Details:
Injectors are normally closed valve. Injector Opens when its electromagnetic coil is energized by the EMS ecu.
Preliminary Checks:
1) Loose/ Damaged Connections between injector and EMS ecu.
2) Check for back out of pins at both Injector connector and ECU connector.
3) Check for damage of pins at both injector connector and ECU connector.
4) Check the continuity from injector connector pins to the ECU pins.