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: 326 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.

P0520 – 67: Oil pressure switch - signal incorrect after event

DTC Description as per ISO standard

Too low viscosity – Low fluid level

ECU Pin Number

A50

Customer Symptom

Fault Effects (On Vehicle)

Cruise control off

Torque limited,

Particulate filter lamp On

DPF Regeneration off

Lamp Status (If Any)

Fault Detection Condition (Root cause)

Ignition ON and Engine ON

Normal Operating Condition

No Fault Code

Probable Trouble Area

Engine oil pressure switch short circuit to ground or open

circuit.

Oil pressure switch

EMS ECU

Healing Condition

Repair the (A50) Engine Oil Pressure Switch Signal circuit for

an open or short to ground.

Component Details:

Engine oil level measured using oil pressure switch.

Preliminary Checks:

1. 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 presence.

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

Earlier issue closure.

3. Check for any other faults presence related to ECU Internal power supplies; Follow rectification process for those

faults, before proceeding further.

4. Check the engine oil pressure switch continuity.