Suzuki Engine 2002 GRAND VITARA SQ625, Service Manual

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IGNITION SYSTEM (FOR J20/H25 ENGINES) 6F2-7
On-Vehicle Service
Ignition Spark Check
1) For H25 engine, remove surge tank cover.
2) Disconnect injector coupler (1).
3) Remove spark plug and check it for condition and type, refer-
ring to “Spark Plug” in this section.
4) If OK, connect ignition coil coupler to ignition coil assembly
and connect spark plug to ignition coil assembly. Ground
spark plug.
5) Crank engine and check if each spark plug sparks.
If no spark is emitted, inspect the related parts as described
under “Diagnosis” earlier in this section.
6) After checking, install spark plug, referring to “Spark Plug” in
this section.
7) Connect injector coupler (1).
8) For H25 engine, install surge tank cover.
Ignition Timing Check and Adjustment
1) Start engine and warm it up to normal operating tempera-
ture.
2) Make sure that all of electrical loads except ignition are
switched off.
3) Check to be sure that idle speed is within specification.
Refer to “Idle Speed/Idle Air Control Duty Inspection” in Sec-
tion 6E1 or 6E2.
WARNING:
Without disconnection of injector coupler, combustible
gas may come out from spark plug holes during this test
and may get ignited in engine room.
[A] : J20 Engine
[B] : H25 Engine
NOTE:
Before starting engine, place transmission gear shift
lever in “Neutral” (shift selector lever to “P” range for A/T
model), and set parking brake.