Suzuki GA413, Service Manual

Page: 966 / 1246

IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED) 8G-7
GA413
supple
DIAGNOSTIC FLOW TABLE
STEP ACTION YES NO
1 1) Make sure that diagnosis switch terminal in
monitor coupler is not grounded by service
wire. See Fig. 1.
2) Check malfunction indicator lamp while ignition
switch is ON (but without starting engine). See
Fig. 2.
Does malfunction indicator lamp flash?
Go to Step 3. If malfunction indicator lamp
remains ON, go to Step 2.
If malfunction indicator lamp
remains OFF, go to “MAL-
FUNCTION INDICATOR
LAMP CHECK” in Section
6.
2 1) Using service wire, ground diagnosis switch
terminal in monitor coupler. See Fig. 3.
Does malfunction indicator lamp flash?
Immobilizer control
system is in good
condition. Go to “MALFUNCTION INDI-
CATOR LAMP CHECK” in
Section 6.
3 Does malfunction indicator lamp flash as Fig. 4? Go to Step 4. Go to “MALFUNCTION INDI-
CATOR LAMP CHECK” in
Section 6.
4 1) Check DTC stored in immobilizer control mod-
ule referring to “DIAGNOSTIC TROUBLE
CODE CHECK (IMMOBILIZER CONTROL
MODULE)” in this section.
Is there any DTC(s)?
Go to flow table for
DTC No.
Go to Step 5.
5 1) Check DTC stored in ECM referring to “DIAG-
NOSTIC TROUBLE CODE CHECK (ECM)” in
this section.
Is there any DTC(s)?
Go to flow table for
DTC No.
Substitute a known-good
ECM and recheck.
NOTE:
After replacing with a
known-good ECM, register
ECM/Immobilizer Control
Module code in ECM by
performing procedure de-
scribed in “Procedure after
ECM Replacement” section.
Fig. 1 for Step 1 Fig. 2 for Step 1 Fig. 3 for Step 2 and Step 5
Fig. 4 for Step 3
1. Monitor coupler
2 Service wire
3 Fuse box
A: Diagnosis switch terminal
B: Ground terminal
Malfunction
indicator
lamp
1. Fuse box
2. Monitor coupler