Mazda MX-5 Miata Sport 2007 Manual page 2059

2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
Coupler (pin holder) damage
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Pin discoloration (blackness)
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If there are no problems, proceed to next investigation below.
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Standard Power Supply System Inspection For Variable Resistance Type 1
Confirm that the #3 terminal is at 5 V .

If the measured voltage on the #3 terminal is 5 V , inspect the following points on the sensor

connector.
If there is no problem, inspect for the following:

Female terminal opening is loose.

Coupler (pin holder) damage

Pin discoloration (blackness)

If the #3 terminal measures other than 5 V , inspect for the following:

Open or short circuit in wiring harness

Harness/pin crimp is loose or disconnected.
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GND System Inspection For Variable Resistance Type 1
Confirm that terminal sensor #5 is at 0 V .

If it is at 0 V , inspect the sensor.

If necessary, replace the sensor.

If not, inspect for the following:

Open or short circuit in wiring harness

Female terminal opening is loose causing an open or short circuit in wiring harness

Coupler (pin holder) damage

Pin discoloration (blackness)

Harness/pin crimp is loose or disconnected.

Variable Resistance Type 2 (Mass Air Flow (MAF) Sensor and VSS)
2007 Mazda MX-5 Miata Sport