HARRIER BOOK 2

Q501 4 Cylinder MT Application

DTC Troubleshooting Data

Version: 0.1

Date: 21-Sep-2018

Prepared By: Mithi Prasad, Sarang Kulkarni, Manish Gupta

Checked By: Yogesh Jadhav

Approved By: Satish Kumar P

Page: 431 of 1052

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.

P0638-22: Throttle Actuator Control Range/Performance (Bank 1): Throttle valve actuator permanent control

deviation (signal amplitude > maximum)

Overview:

DTC Description (User Friendly)

Throttle Actuator Control Range/Performance (Bank 1):

Throttle valve actuator permanent control deviation (signal

amplitude > maximum)

ECU Pin Number

A016, A098, A097,A008, A009

Customer Symptom

MIL ON, CEL OFF

Fault Effects (On Vehicle)

Lamp Status (If Any)

MIL ON. MIL Turns Off as and when fault condition is not

present / healed.

Fault Detection Condition (Root cause)

The limit for the maximum permissible positive control

deviation threshold91 (12 volt) is exceeded and The control

deviation is present for longer than the applicable time

threshold93 (4000ms).

Normal Operating Condition

Maximum permissible positive control deviation is within limit.

Probable Trouble Area

Wiring harness connections between TVA actuator and EMS

ECU.

Healing Condition

Rectify the error Clear through diagnostic tool.

Ignition OFF & ON

Component Details:

Throttle valve is connected to accelerator pedal. Throttle position sensor measures current position of throttle valve,

based on this ems generates signal to the TVA Actuator. Signal generation for the actuator is based on TVA position

sensor signal value.

Preliminary Checks:

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

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

2. Check whether other customers report similar complaints earlier. If yes, perform the preliminary checks with

respect to earlier issue closure.

3. Check for Damage in EMS ECU connector / TVA Actuator and TVA position sensor.

4. Check for any back out of pins at EMS ECU connector / TVA Actuator and TVA position sensor.

5. Check for any damage of pins at EMS ECU connector / TVA Actuator and TVA position sensor.

Trouble Shooting: