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Immobilizer –DTC Troubleshooting Data
Version: 1.
2
Date:
03-June-2014
Prepared Author
:
Sarang K/Mithipati P
Review & approved by
: R A Rode (ERC-E&E)
Page: 12 of 67
Copyright ©
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.
B1637-57: Vehicle Immobilizer Control Module Transponder invalid incomplete software component
Overview:
ISO Code
B1637-57
DTC simple description
Transponder secret key not programmed
Customer Symptom
Vehicle cannot be started.
Fault Effects (On Vehicle)
Vehicle cannot be started.
Lamp Status (If Any)
Immo status lamp On
Fault Detection Condition
At ignition On
Normal Operating Condition
Authentication between EMS & Immo is successful
Probable Trouble Area
Transponder key (E-key)
Healing Condition
Component Details:
Immobilizer system is designed to prevent vehicle theft by electronically disabling the engine starting system. The
engine can be started only with vehicle’s original immobilizer ignition key, which has an electronic identification
programmed code. Immobilizer unit (ICU) is an add-on part on the ignition switch, fitted on the steering column.
The engine can be started only with the vehicle’s original immobilizer ignition key. The electronic key
communicates the identification code to ICU when the key is turned to the "Ignition ON" position.
Preliminary Checks:
Transponder key.
Trouble Shooting:-
Step Checks
IF YES
IF NO
1.
Replace the transponder key matching to ignition locj
2.
Learn the key with immobilizer
DTC’s confirmation:-
Confirm that there should not be any error in immobilizer.
Circuit Schematic Diagram:
Please refer immobilizer schematc
VICM
pin
no
Pin description
1
Vbatt (KL30)
2
GND
3
CAN_H(High-speed)
4
Ignition (KL15)
5
Status LED
6
Trasport Mode Fuse (10A)
7
Battery Supply (+Vbatt)
8
CAN_L(High-speed)