YH4
GRAND
VITARA
8G-14 IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED)
In cabin
- 1. Main fuse
- 2. Main relay
- 3. Immobilizer Control Module
- 4. Immobilizer diagnostic coupler
4-1. Ground terminal
4-2. Diagnostic output terminal
- 5. To ECM/PCM
TABLE A DTC IS NOT OUTPUT FROM DIAGNOSTIC OUTPUT TERMINAL
STEP ACTION YES NO
1 Check voltage between A3 terminal
and body ground with ignition switch
turned ON.
Is it 10 – 14V?
Go to Step 2. “(f)” wire open.
2
1) Connect voltmeter between A5
terminal and body ground.
2) Does voltmeter indicator deflect?
Go to Step 3. Poor A3, A5 or A7 connection.
“(h)” wire of A7 terminal open.
“(m)” wire between A5 terminal and
diagnostic output terminal of immobi-
lizer diagnostic coupler short.
If wire and connections are OK, substi-
tute a known-good Immobilizer Control
Module and recheck.
NOTE:
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 Immobilizer Control
Module by performing procedure
described in “Procedure after Immo-
bilizer Control Module Replace-
ment” section.
3
1) Connect voltmeter between diag-
nostic output terminal of immobiliz-
er diagnostic coupler and body
ground.
2) Is it possible to read DTC by check-
ing deflection of voltmeter indicator?
“(n)” wire of ground
terminal for immo-
bilizer diagnostic
coupler open.
“(m)” wire between A5 terminal and diag-
nostic output terminal of immobilizer
diagnostic coupler open.
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