Suzuki Wagon R Manual page 2336

On-Vehicle Service
Ignition Spark Test
1) Remove air cleaner assembly with air intake pipe.
2) Disconnect all injector couplers from injectors.
WARNING:
Without disconnection of injector couplers, combustible
gas may come out from spark plug holes during this test
and may get ignited in engine room.
3) Remove spark plug and check it for condition and type refer-
ring to "Spark Plugs Removal and Installation" in this section.
4) If OK, connect ignition coil coupler to ignition coil assembly
and connect spark plug to ignition coil assembly or high-ten-
sion cord. Ground spark plug.
5) Crank engine and check if each spark plug sparks.
6) If no spark is emitted, inspect the related parts as described
under "Ignition System Symptom Diagnosis" in this section.
High-Tension Cords Removal and Installation
Removal
1) Remove air cleaner assembly with air intake pipe and cylin-
der head upper cover.
2) Disconnect No.1 cylinder (2) and No.3 cylinder (3) high-ten-
sion cords from ignition coil assemblies (1) while gripping
each cap.
3) Pull out high-tension cords from spark plugs while gripping
each cap.
CAUTION:
• Removal of high-tension cords together with clamps
will be recommended so as not to damage their inside
wire (resistive conductor).
• For the same reason, pull out each connection by grip-
ping cap portion.
IGNITION SYSTEM (M13 ENGINE) 6F2-7