Suzuki WagonR+ RB310 Service Manual page 2939

8G-4 IMMOBILIZER CONTROL SYSTEM
ON-BOARD DIAGNOSTIC SYSTEM
ECM and immobilizer control module diagnose troubles which may
occur in the area including the following parts when the ignition
switch is turned to ON position.
Immobilizer control module
D Immobilizer control module
D W-line (ECM/immobilizer control module communication line)
D Password
D MIL circuit
D Transponder (ignition key)
D Fix code
ECM
D ECM
D Secret key
D Password
When a trouble exists in the immobilizer control system (when im-
mobilizer control module or ECM detects a diagnostic trouble code
(DTC)), ECM stops operation of the injector and igniter.
For EC spec vehicle (not equipped with diagnosis
connector #3)
It is impossible to know whether immobilizer system have troubles
or not by referring MIL.
It is possible to communicate by using only SUZUKI scan tool.
For non-EC spec vehicle (equipped with diagnosis
connector #3)
With the diagnosis switch terminal of diagnosis connector #3 (diag-
nosis monitor connector) (1) for ECM not grounded, the ignition
switch turned at ON position (but engine at stop) and regardless of
the condition of the electronic fuel injection system, ECM indicates
whether a trouble has occurred in the immobilizer control system
or not by causing the malfunction indicator lamp to flash or turn on.
MIL lights on:
No trouble exists in immobilizer control system.
MIL flashes:
ECM detected some trouble in the immobilizer control system.
With ignition switch turned to ON position and diagnostic switch ter-
minal grounded, ECM outputs DTC (diagnostic trouble code) by
flashing MIL (malfunction indicator lamp).
NOTE:
As soon as the ignition switch is turned to ON position, ECM
and immobilizer control module diagnose if a trouble has oc-
curred in the immobilizer control system in about 5 seconds
at maximum.
While the diagnosis is being made, the MIL (malfunction indi-
cator lamp) stays on and diagnosis result is abnormal, it im-
mediately changes to flashing but if the result is normal, it re-
mains on.