8509013

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.

note

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 (to coil) terminal of 'A/C RELAY' harness connector and chassis ground.

Check voltage between power supply (from battery) terminal of 'A/C RELAY' 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".
	▶ Repair problems of circuit related to the A/C fuse in E/R FUSE & RELAY BOX and go to "Verification of Vehicle Repair".

Check voltage between 'A/C relay control' terminal of 'A/C RELAY' harness connector and chassis ground.

Specification : 10.5V ~ 14.5V

note

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Is the measured value within specification?

▶ Go to "Component Inspection" procedure.

▶ If no voltage is detected, go to "Check open in control circuit" as follows.

▶ If the voltage is high than specification value, repair short to battery between 'A/C relay control' terminal of 'A/C RELAY' and 'A/C relay control' terminal of ECM harness connector, and go to "Verification of Vehicle Repair" procedure.

Check resistance between 'A/C relay control' terminal of 'A/C RELAY' harness connector and 'A/C relay control' terminal of ECM harness connector.

Specification : Continuity (Below 1.0Ω)

note

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Is the measured value within specification?

	▶ Repair short to ground between 'A/C relay control' terminal of 'A/C RELAY' harness connector and 'A/C relay control' terminal of ECM harness connector, and go to "Verification of Vehicle Repair" procedure.
	▶ Repair open between 'A/C relay control' terminal of 'A/C RELAY' harness connector and 'A/C relay control' terminal of ECM harness connector, and go to "Verification of Vehicle Repair" procedure.