YH4
GRAND
VITARA
ENGINE (H25 ENGINE) 6-1-47
TROUBLESHOOTING
STEP ACTION YES NO
1 Test Switch Terminal check (vehicle with monitor
connector):
(1)Check test switch terminal of monitor connector 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. Fuse (1, 3 or 21)
blown.
Faulty circuit (Battery
– C51-2-3).
3 MIL Bulb and 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
section.
Faulty circuit
(Fuse 21 – E61-34).
MIL bulb burned out.
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