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
.
If it is at
0 V
, inspect the sensor.
If necessary, replace the sensor.
If not at
0 V
, inspect for the following:
Open circuit in wiring harness
Female terminal opening is loose.
Coupler (pin holder) damage
Pin discoloration (blackness)
Harness/pin crimp is loose or disconnected.
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
the next step.
If there is a difference of
0.5 V or more
, inspect for the following points concerning the PCM
2007 Mazda MX-5 Miata Sport
2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
Microsoft
Thursday, July 09, 2009 2:42:11 PM
Page 127
© 2005 Mitchell Repair Information Company, LLC.