Connector); Grounding Diagnosis Switch Terminal - Suzuki Engine 2002 GRAND VITARA SQ420 Service Manual

6-58 ENGINE GENERAL INFORMATION AND DIAGNOSIS (G16/J20 ENGINES)
Table A-3 MIL Check – MIL Flashes at Ignition Switch On (Vehicle with Monitor

Connector)

WIRING DIAGRAM/CIRCUIT DESCRIPTION
Refer to TABLE A-1.
INSPECTION
Step
1 MIL Flashing Pattern Check :
1) Turn ignition switch ON.
Does lamp flashing pattern indicate diagnostic
trouble code?
2 Diag. Switch Circuit Check:
Is diag. switch terminal connected to ground via
service wire?
Table A-4 MIL Check – MIL Does Not Flash or Just Remains on Even with

Grounding Diagnosis Switch Terminal

WIRING DIAGRAM/CIRCUIT DESCRITION
Refer to TABLE A-1.
INSPECTION
Step
1 MIL Circuit Check:
1) Turn ignition switch OFF and disconnect
connectors from ECM (PCM).
Does MIL turn ON at ignition switch ON?
2 ECM/PCM Connection Check :
1) Turn ignition switch OFF.
Is connector (E61-29 connection) connected to
ECM/PCM properly?
3 Diag. switch Terminal Circuit Check :
1) Connect connectors to ECM (PCM).
2) Using service wire, ground E61-29 terminal
with connectors connected to ECM (PCM).
3) Turn ignition switch ON.
Does MIL flash?
Action
Action
Yes
Go to Step 2.
System is in good condi-
tion.
Yes
"PPL/YEL" circuit shorted
to ground.
Go to Step 3.
"YEL" or "BLK" circuit
open.
No
Go to "Diagnosis" in Sec-
tion 8G.
"YEL" circuit shorted to
ground. If circuit is OK
substitute a known-good
ECM (PCM) and recheck.
No
Go to Step 2.
Poor connector connec-
tion.
Substitute a known-good
ECM (PCM) and recheck.