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 connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

Has a problem been found?

	▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure
	▶ Go to next step as below

IG "OFF".

Disconnect MAFS connector.

IG "ON" & ENG "OFF".

Measure voltage between of power terminal MAFS harness connector and chassis ground.

Is the measured voltage within specification ?

	▶ Go to next step as below.
	▶ Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.

Ignition "OFF"

Disconnect MAFS connector.

IG "ON" & ENG "OFF".

Measure voltage between each of signal terminal MAFS harness connector and chassis ground.

Is the measured voltage within specification ?

	▶ Go to next step as below.
	▶ Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.

Ignition "OFF"

Disconnect MAFS connector

Measure the resistance between each of signal termal MAFS harness connector and chassis ground.

Is resistance within the specification?

	▶ Go to next step as below
	▶ Repair open circuit and go to "Verification of Vehicle Repair" procedure