Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.

Thoroughly check all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage. .

Has a problem been found?

	▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
	▶ Go to "Control Circuit Inspection" procedure.

Ignition switch "OFF"

Refer to "Shop Manual" and disconnect injector

Ignition Switch "OFF"

Re-connect injector

Is the measured value within specification?

	▶ Go to "Injector Control Low Inspection" procedure.
	▶ Inspect and repair open or short in circuit, and then go to "Verification of Vehicle Repair" procedure.

Ignition Switch "OFF"

Refer to "Shop Manual" and disconnect injector

Ignition Switch "OFF"

Re-connect injector

Is the measured value within specification?

	▶ Go to "Short in Injector Control Circuit Inspection" procedure.
	▶ Inspect and repair open or short in circuit, and then go to "Verification of Vehicle Repair" procedure.

Ignition switch "OFF"

Disconnect battery (-) cable.

Refer to "Shop Manual" and disconnect Injector and ECM connector.

Measure the resistance between low terminal and high terminal of injector

Is the measured value within specification?

	▶ Go to "Component Inspection" procedure.
	▶ Inspect and repair open or short in circuit, and then go to "Verification of Vehicle Repair" procedure.