Diagnosis Procedure
WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY
- Disconnect mass air flow sensor (with intake air temperature sensor) harness connector.
- Turn ignition switch ON.
- Check the voltage between mass air flow sensor harness connector and ground.
+
-
Voltage
MAF sensor
Connector
Terminal
F31
4
Ground
Approx. 5 V
Is the inspection result normal?
YES
GO TO 2.
NO
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK INTAKE AIR TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between mass air flow sensor harness connector and ECM harness connector.
MAF sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
F31
2
F13
40
Existed
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 3.
NO
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK INTAKE AIR TEMPERATURE SENSOR
Check intake air temperature sensor. Refer to Component Inspection .
Is the inspection result normal?
YES
INSPECTION END
NO
Replace mass air flow sensor. Refer to Removal and Installation .