8498836

Electrical systems consist of a lot of harness and connectors, poor connection of terminals can cause various problems and damage of component.

Perform checking procedure as follows.

(1)

Check damage of harness and terminals : Check terminals for contact resistance, corrosion and deformation.

(2)

Check connecting condition of ECM and component connector : Check terminal separation, damage of locking device and connecting condition between terminal and wiring.

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Disconnect the pin which requires checking at male connector and insert it to the terminal at female connector for checking connecting condition. (After checking, reconnect the pin at correct position.)

Is the problem found?

	▶ Repair the trouble causing part and go to "Verification of Vehicle Repair" procedure.
	▶ Go to "Power Circuit Inspection".

Check voltage between power supply terminal of 'FUEL METERING UNIT' harness connector and chassis ground.

Specification : 10.5V ~ 14.5V

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Is the measured value within specification?

▶ Go to "Control Circuit Inspection".

▶ If no voltage is detected, repair open between power supply terminal of 'FUEL METERING UNIT' harness connector and power supply terminal of 'E/R JUNCTION BOX' harness connector, and go to "Verification of Vehicle Repair" procedure.

▶ If the voltage is high than specification value, repair short to battery between power supply terminal of 'FUEL METERING UNIT' harness connector and power supply terminal of 'E/R JUNCTION BOX' harness connector, and go to "Verification of Vehicle Repair" procedure.

Check voltage between 'Fuel metering unit' terminal of 'FUEL METERING UNIT' harness connector and chassis ground.

Specification : 3.2V ~ 3.7V

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Is the measured value within specification?

	▶ Go to "Open in control circuit" as follows.
	▶ Repair short to battery between 'Fuel metering unit' terminal of 'FUEL METERING UNIT' harness connector and 'Fuel metering unit' terminal of ECM harness connector, and go to "Verification of Vehicle Repair" procedure.

Check resistance between 'Fuel metering unit' terminal of 'FUEL METERING UNIT' harness connector and 'Fuel metering unit' terminal of ECM harness connector.

Specification : Continuity (Below 1.0Ω)

note

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Is the measured value within specification?

	▶ Go to "Component Inspection" procedure.
	▶ Repair open or short between 'Fuel metering unit' terminal of 'FUEL METERING UNIT' harness connector and 'Fuel metering unit' terminal of ECM harness connector, and go to "Verification of Vehicle Repair" procedure.