Suzuki Engine 2002 GRAND VITARA SQ625, Service Manual

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6-1-56 ENGINE GENERAL INFORMATION AND DIAGNOSIS (H25 ENGINE)
TROUBLESHOOTING
Step Action Yes No
1 Test Switch Terminal check (vehicle with moni-
tor connector) :
1) Check test switch terminal of monitor con-
nector for being grounded.
2) With ignition switch ON leaving engine OFF,
measure voltage between E61-16 and
ground.
Check the voltage for 10 – 14 V.
Are they in good condition?
Go to Step 2. Test switch terminal circuit
is shorted to ground.
Repair or correct.
2 Ignition Switch Signal check :
1) Remove ECM (PCM) cover.
2) With ignition switch ON leaving engine OFF,
check voltage between C51-2-3 and
ground.
Is voltage 10 – 14 V?
Go to Step 3. Main fuse or “IG COIL”
fuse blown.
Faulty circuit (Battery –
C51-2-3).
3 MIL Circuit check :
1) Using service wire, ground E61-34 terminal.
Does MIL turn ON at ignition switch ON?
Go to TABLE A-3 “ECM
(PCM) Power and Ground
Circuit Check” in this sec-
tion. Faulty circuit (“IG COIL”
fuse – E61-34).
MIL bulb burned out.