HARRIER BOOK 2

Vehicle Platform: OSPREY / AMP

ECU Name: PEPS

DTC Troubleshooting Data

Version: 1.2

Date: 29 Mar 2017

Author:

Rajasekhara Reddy

Page: 99 of 369

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.

B164B - 12:- CRANK Relay Feedback - circuit short to battery

Overview:-

ISO Code (DTC Code)

B164B – 12

Customer Symptom

1. Could not start vehicle.

2. LED of engine start/stop button will always remain

OFF.

Fault Effects (On Vehicle)

1. Could not start vehicle.

2. LED of engine start/stop button will always remain

OFF.

Lamp Status (If Any)

Fault Detection Condition

During Cranking OFF.

Normal Operating Condition

During cranking, crank relay feedback line should be equal to

battery voltage.

Probable Trouble Area

1. Permanent short of output of crank relay.

2. Crank relay feedback line between PEPS ecu

connector-3/pin-18 and vehicle battery signal..

Healing Condition

IGN OFF -> ON.

Table 172

:- B164B- 12 overview details

Component Details:-

1. PEPS ECU.

2. Crank relay

Preliminary Checks:-

1. Check Battery Voltage (9V-16V).

2. Check ECU pins for oxidation, bending & damage.