YH4
GRAND
VITARA
8G-22
IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED)
A8
1
2
To SDM (if equipped with AIRBAG)
To data link connector (DLC)
1. Immobilizer Control Module
2. ECM / PCM
(j)
(i)
(i)
(i)
DTC23 NO ECM/IMMOBILIZER CONTROL MODULE CODE TRANSMITTED
FROM ECM/PCM OR DLC CIRCUIT OPENED/SHORTED
DTC83 NO ECM/IMMOBILIZER CONTROL MODULE CODE TRANSMITTED
(P1621) FROM IMMOBILIZER CONTROL MODULE OR DLC CIRCUIT
OPENED/SHORTED
DESCRIPTION
When the ignition switch is ON, Immobilizer Control Module requests ECM / PCM and ECM / PCM requests Immobi-
lizer Control Module to transmit ECM/Immobilizer Control Module code. If ECM/Immobilizer Control Module code
is not transmitted from ECM / PCM or Immobilizer Control Module, Immobilizer Control Module sets DTC23 and
ECM / PCM sets DTC83 (P1621).
INSPECTION:
STEP
ACTION
YES
NO
1
Check voltage between
Immobilizer Control Mod-
ule coupler terminal A8
and body ground with igni-
tion switch turned ON.
Is it 4 – 5V?
Go to Step 2.
“(i)” or “(j)” wire
short.
2
1) Disconnect ECM /
PCM coupler with igni-
tion switch turned
OFF.
2) Is there continuity be-
tween Immobilizer
Control Module cou-
pler terminal A8 and
Data link connector
terminal of ECM / PCM
coupler? (For posi-
tions of Data link con-
nector terminal of
ECM / PCM coupler,
refer to Section 6E1 or
6E2.)
Poor A8 connection (Immobilizer Control Module) or
Poor Data link connector terminal connection (ECM /
PCM). If connections are OK, substitute a known-good
ECM / PCM or Immobilizer Control Module and re-
check.
NOTE :
After replacing with a known-good ECM / PCM,
register ECM/Immobilizer Control Module code
in ECM / PCM by performing procedure de-
scribed in “Procedure after ECM / PCM Replace-
ment” section.
After replacing with a known-good Immobilizer
Control Module, register ECM/Immobilizer Control
Module code in ECM/PCM and Transponder code
and ECM/Immobilizer Control Module code in Im-
mobilizer Control Module by performing proce-
dure described in “Procedure after Immobilizer
Control Module Replacement” section.
“(i)” or “(j)” wire be-
tween Immobilizer
Control Module and
ECM / PCM open.
Fig. 1 for step 1
1
A8
1. Immobilizer Control Module
1. Immobilizer Control Module coupler disconnected
1
A8
Connect to Data link connector terminal
of ECM / PCM coupler disconnected
Fig. 2 for step 2
Summary of Contents for Grand Vitara 1998
Page 225: ...YH4 GRAND VITARA FRONT SUSPENSION 3D 23 TIGHTENING TORQUE SPECIFICATIONS ...
Page 531: ...YH4 GRAND VITARA 8 6 BODY ELECTRICAL SYSTEM POWER SUPPLY DIAGRAM Refer to Section 8A ...
Page 659: ...YH4 GRAND VITARA BODY SERVICE 9 41 1 Side body outer panel A Apply sealant B Brush treatment ...
Page 673: ...YH4 GRAND VITARA BODY SERVICE 9 55 B B C C 2 DOOR MODEL ...