Mazda MX-5 Miata Sport 2007 Manual page 2060

2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
Fig. 13: Mass Air Flow (MAF) Sensor & VSS - Circuit Diagram
Courtesy of MAZDA MOTORS CORP.
GND System Inspection For Variable Resistance Type 2
Confirm that terminal sensor #4 is at 0 V .
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If it is at 0 V , inspect the sensor.
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If necessary, replace the sensor.
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If not at 0 V , inspect for the following:
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Open circuit in wiring harness
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Female terminal opening is loose.
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Coupler (pin holder) damage
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Pin discoloration (blackness)
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Harness/pin crimp is loose or disconnected.
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Input Signal System Inspection For Variable Resistance Type 2
1. When an irregular signal is detected, measure the #1 PCM terminal voltage.
If the #1 terminal voltage and the M-MDS or equivalent monitor voltage are the same, proceed to
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the next step.
If there is a difference of 0.5 V or more , inspect for the following points concerning the PCM
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2007 Mazda MX-5 Miata Sport