HARRIER BOOK 2

X2 Eagle

ESP DTC Troubleshooting Data

Version: 1.0

Date: 23-Oct-15

Author: ERC, Chassis E&E CoC

Page: 193 of 224

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.

U1620-08:- Lost communication with Drive Control Switch module

Overview:

ISO Code

U1620-08

Customer Symptom

None

Fault Effects (On Vehicle)

ABS, EBD & ESP – Available

Lamp Status (If Any)

ABS – OFF, EBD – OFF, ESP – OFF

Fault Detection Condition

1. MSS connector is not connected properly or disconnected

from its location.

2. CAN wire from MSS connector side are disconnected

3. MSS VCC line fuse blown/disconnected.

4. CAN_H, CAN_L or both lines of MSS are open circuit

Normal Operating Condition

MSS communicates properly with TML diagnostic Tool.

Probable Trouble Area

1. MSS connector / MSS fuse.

2. CAN lines of MSS

Healing Condition

1. MSS is connected and no wiring harness issues from

MSS side

2. CAN_H, CAN_L or both lines of MSS are connected

properly

Preliminary Check:

Check resistance in Diagnostic CAN pin no. 6 and 14. It should be 120 Ω.

Check for short conditions between CAN_H (pin no. 26)-CAN_L (pin no. 14), CAN_H (pin no. 26)-GND (pin no. 13),

CAN_L (pin no. 14)-GND (pin no. 13), CAN_H (pin no. 26)-Vbatt (pin no. 1) and CAN_L (pin no. 14)-GND (pin no. 13).

There should not be any short circuit conditions.

Check continuity between IPC CAN_H (pin no. 8) vehicle side connector to OBD connector CAN_H (pin no. 6) and

CAN_L (pin no. 7) vehicle side connector to ODB connector (pin no.14)

Read IVN DTCs in ABS/ESP in IGN ON condition

Note: After rectification please give Ignition latch to heal the DTC.