NEXON DIAGNOSTIC MANUAL

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: 1052 of 1203

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.

P2229-15: Barometric Pressure Circuit High – circuit short to battery or open

Overview:

ISO Code

P2229-15

Customer Symptom

Vehicle drivability will be affected

Fault Effects (On Vehicle)

Vehicle drivability will be affected

Lamp Status (If Any)

CE Lamp ON after 1 driving cycle

Fault Detection Condition

This fault gets logged when the Barometric Pressure Sensor signal is short

Circuited to battery.

Normal Operating Condition

Proper signal from Barometric Pressure Sensor to EMS ecu

Probable Trouble Area

Barometric Pressure Sensor mounted on EMS ECU

Healing Condition

After 1 drive cycles

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:

EMS ECU is an electronic controller which controls the Engine functionality by interfacing with various Sensors,

actuators and other controllers (via CAN). Barometric Pressure Sensor is Mounted on EMS ecu, which provides the

atmospheric pressure value to EMS ecu.

Preliminary Checks:

1. Check whether the EMS is receiving Battery supply and Ground

2. Check whether the Battery is healthy

Trouble Shooting:-

Step

Checks

IF YES

IF NO

1. Check whether the EMS ECU is receiving supply and

Ground

Go to step 2

Rectify wiring

harness

connections as

per schematic

Check whether the battery is healthy

Go to step 3

Repair Battery

If fault still persists

Replace EMS ECU

Repeat above

procedure for

reconfirmation

DTC’s confirmation:-

After rectification, ensure the following points by referring engine parameters using TML diagnostic tool before

handing over to customer.

Replace EMS ECU and check whether the fault is rectified or not.