Component Inspection

Inspection Condition	Inspection Procedure	Reference
Engine "ON".	Connect KDS to "Data Link Connector (DLC)". Perform "Actuation Test" of concerned component with KDS.	Fig.1

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Inspection Condition	(+) Probe		(-) Probe		Reference
Inspection Condition	connector	Terminal	connector	Terminal	Reference
Engine "ON".	Injector #4 connector	2 (+)	Chassis ground	-	Fig.2
Engine "ON".	Injector #4 connector	1 (-)	Chassis ground	-	Fig.2

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Good

No Good

Carefully re-do this troubleshooting guide steps.
If no problems were found with the circuits or connectors, replace the injector #4 and go to "Verification of Repair " procedure.