NEXON DIAGNOSTIC MANUAL

OSPREY- Application

DTC Troubleshooting Data

Version: 4.0

Date: 10-02-2017

Prepared by: Mithipati Prasad

Checked by: G S Raju / Senthilnathan S

Page: 341 of 654

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.

P1107: Atmospheric Pressure Signal - Generic Fault

Overview:

DTC Description as per ISO standard

Manifold Absolute Pressure/Barometric Pressure Circuit

Global Fault

ECU Pin Number

ECU Internal

Customer Symptom

Engine restricted performance

Probable loss of power and black smoke

Fault Effects (On Vehicle)

Disables EGR by setting desired rate to 0. This will affect

EGRH rate, EGRL rate, Throttle, Intake manifold

pressure and boost pressure.

Reduced torque mode is activated

Lamp Status (If Any)

CE & MIL lamp is on

Fault Detection Condition (Root cause)

This DTC Atmospheric pressure sensor - generic gets logged

due to faults raised on atmospheric sensor (P0107, P0108,

P0109)

Normal Operating Condition

No faults related to atmospheric pressure sensor

Probable Trouble Area

Atmospheric Pressure Sensor mounted on EMS ecu

Related wiring Harness, connector or terminals

EMS ecu

Component Details:

Atmospheric Pressure Sensor is mounted inside ECU; it gives the Atmospheric Pressure signal to ECU internally. No

separate hardware pins assigned to Atmospheric Pressure signal in wiring harness. EMS uses the atmospheric pressure

information for correction of air fuel ratio at higher altitudes.

Preliminary Checks

Check whether the customer voice / view about the issue is matching with the fault effects mentioned above. If

yes, go ahead with next steps. If not, check for other DTC’s pre

sence.

Check whether similar complaints are earlier reported. If yes, perform the preliminary checks with respect to

earlier issue closure.

Check whether the EMS ECU is getting power supply and GND. Rectify wiring Harness as per the schematic if

found faulty