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03-June-2014
Prepared Author
:
6DUDQJ . 0LWKLSDWL 3
Review & approved by
: R A Rode (ERC-E&E)
Page: 20 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.
B1639-31: Vehicle immobilizer control module no signal
Overview:
ISO Code
B1639-31
DTC simple Description
(06 LV QRW WUDQVPLWWLQJ &$1 PHVVDJH
Customer Symptom
9HKLFOH FDQQRW EH VWDUWHG
Fault Effects (On Vehicle)
9HKLFOH FDQQRW EH VWDUWHG
Lamp Status (If Any)
,PPR VWDWXV ODPS 2Q
Fault Detection Condition
$W LJQLWLRQ 2Q
EŽƌŵĂů KƉĞƌĂƚŝŶŐ ŽŶĚŝƚŝŽŶ
$XWKHQWLFDWLRQ EHWZHHQ (06 ,PPR LV VXFFHVVIXO
Probable Trouble Area
: K (06 (&8 ,PPRELOL]HU
Healing Condition
Component Details:
,PPRELOL]HU V\VWHP LV GHVLJQHG WR SUHYHQW YHKLFOH WKHIW E\ HOHFWURQLFDOO\ GLVDEOLQJ WKH HQJLQH VWDUWLQJ V\VWHP 7KH
HQJLQH FDQ EH VWDUWHG RQO\ ZLWK YHKLFOH¶V RULJLQDO LPPRELOL]HU LJQLWLRQ NH\ ZKLFK KDV DQ HOHFWURQLF LGHQWLILFDWLRQ
SURJUDPPHG FRGH ,PPRELOL]HU XQLW LV DQ DGG RQ SDUW RQ WKH LJQLWLRQ VZLWFK ILWWHG RQ WKH VWHHULQJ FROXPQ 7KH
HQJLQH FDQ EH VWDUWHG RQO\ ZLWK WKH YHKLFOH¶V RULJLQDO LPPRELOL]HU LJQLWLRQ NH\ 7KH HOHFWURQLF NH\ FRPPXQLFDWHV
WKH LGHQWLILFDWLRQ FRGH WR ,&8 ZKHQ WKH NH\ LV WXUQHG WR WKH ,JQLWLRQ 21 SRVLWLRQ
Preliminary Checks:
1
&KHFN WKH &$1 + &$1/ ZLUHV EHWZHHQ (06 ,PPRELOL]HU
(06 (&8 VXSSO\ *QG ZLUHV
.
Trouble Shooting:-
Step Checks
IF YES
IF NO
1.
Check the EMS ECU is connector connected to ECU
Go to step 1
Connect EMS ECU
2.
Check the EMS ECU supply & Gnd wires are properly
connected
Go to step 2
Correct the
connection
3
Check the CAN H & CAN L wires continuity between EMS
ECU pin (CAN H 64, CAN L 40) & Immobilizer pin (CANH
3, CAN L 8)
Go to step 3
Correct the
connection
4
Check the resistance between CAN H & CAN L at immo pin
3 & 8, it should be 60±5
Go to step 4
Check any short
circuit in w/h.
5
Replace the EMS ECU with new good one & pair the ECU
with immobilizer.
6
If fault still present in immobilizer replace the immobilizer
DTC’s confirmation:-
Before handover to customer, ensure that vehicle will start without any error
Circuit Schematic Diagram:
Please refer the immobilizer circuit schematic
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