Suzuki Engine 2002 GRAND VITARA SQ625, Service Manual

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ENGINE GENERAL INFORMATION AND DIAGNOSIS (G16/J20 ENGINES) 6-57
INSPECTION
Table A-2 Malfunction Indicator Lamp Circuit Check – MIL Remains “ON” After
Engine Starts
WIRING DIAGRAM/CIRCUIT DESCRITION
Refer to TABLE A-1.
INSPECTION
Step Action Yes No
1 MIL Power Supply Check :
1) Turn ignition switch ON.
Do other indicator/warning lights in combination
meter comes ON?
Go to Step 2. “IG” fuse blown, main fuse
blown, Ignition switch mal-
function, “BLK/WHT” cir-
cuit between “IG” fuse for
Canvas Top model or “IG
COIL” fuse except for
Canvas Top model and
combination meter or
poor coupler connection
at combination meter.
2 ECM Power and Ground Circuit Check :
Does engine start? Go to Step 3. Go to TABLE A-5 ECM
(PCM) “Power and
Ground Circuit Check”.
If engine is not cranked,
go to DIAGNOSIS in Sec-
tion 6G or 6G1.
3 MIL Circuit Check :
1) Turn ignition switch OFF and disconnect
connectors from ECM.
2) Check for proper connection to ECM at ter-
minal E61-7.
3) If OK, then using service wire, ground termi-
nal E61-7 in connector disconnected.
Does MIL turn on at ignition switch ON?
“PPL/YEL” circuit shorted
to ground or test switch
terminal of monitor con-
nector is shorted to
ground
(if equipped).
If OK, substitute a known-
good ECM (PCM) and
recheck. Bulb burned out for Can-
vas top model, faulty com-
bination meter except for
Canvas Top model or
“PPL/YEL” wire circuit
open.
Step Action Yes No
1 DTC Check:
1) With ignition switch OFF, install scan tool.
2) Start engine and check DTC.
Is there any DTC(s)?
Go to Step 2 of “Engine
Diag. Flow Table” in this
section. Go to Step 2.
2 MIL Circuit Check :
1) With ignition switch OFF, disconnect cou-
plers from ECM (PCM).
Does MIL turn ON at ignition switch ON?
“PPL/YEL” wire shorted to
ground circuit. Substitute a known-good
ECM (PCM) and recheck.