Mazda Mazda6 - Mass Air Flow (Maf);Intake Air Temperature (Iat) Sensor Inspection

F2–74
CONTROL SYSTEM
MASS AIR FLOW (MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION
A6E404013210201
Note
• Perform the following test only when directed.
• Perform “MAF Correction” after replacing the MAF/IAT sensor. (See F2–35 MAF Correction.)
MAF Sensor Voltage Inspection
1. Turn the engine switch to ON.
2. Monitor the MAF PID using the WDS or equivalent.
• If not as specified, perform the “Circuit Open/Short Inspection”.
MAF PID
0.0—1.0 V
3. Start the engine and warm up the engine completely.
4. Monitor the MAF PID using the WDS or equivalent at idle.
• If not as specified, perform the “Circuit Open/Short Inspection”.
MAF PID
1.5—2.1 V
MAF Sensor CIrcuit Open/Short Inspection
1. Inspect for open/short circuit in the following
wiring harnesses.
• If there is open/short circuit, repair or replace
wiring harnesses.
Open circuit
• Power circuit
— MAF/IAT sensor terminal A and PCM control
relay terminal C
• Signal circuit
— MAF/IAT sensor terminal C and PCM terminal
9
• GND circuit
— MAF/IAT sensor terminal B and PCM terminal 14
Short circuit
• Power circuit
— MAF/IAT sensor terminal A and PCM control relay terminal C to GND
• Signal circuit
— MAF/IAT sensor terminal C and PCM terminal 9 to power circuit
— MAF/IAT sensor terminal C and PCM terminal 9 to GND
MAF/IAT SENSOR
HARNESS SIDE CONNECTOR
A
B
C
D
E
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