infiniti Workshop Repair Guides

Infiniti Workshop Service and Repair Manuals

Heated Oxygen Sensor <--> [Oxygen Sensor] > < MAP/BARO Switch Solenoid Valve <--> [Manifold Pressure/Vacuum Sensor]|Description and Operation|Page 4961
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4. If NG, check "Absolute pressure sensor" below.

OR 

Without Consult 

1. Remove MAP/BARO switch solenoid valve.
2. Check air passage continuity.
3. If NG, check "Absolute pressure sensor" below.

Absolute pressure sensor 

1. Remove absolute pressure sensor from bracket with its harness connector connected.
2. Remove hose from absolute pressure sensor.
3. Apply vacuum and pressure to absolute pressure sensor as shown in figure.
4. Check output voltage between terminal (2) and engine ground.
5. If NO, replace absolute pressure sensor.

If OK, check MAP/BARO switch solenoid valve. Refer to "COMPONENT INSPECTION".

Heated Oxygen Sensor <--> [Oxygen Sensor] > < MAP/BARO Switch Solenoid Valve <--> [Manifold Pressure/Vacuum Sensor]|Description and Operation|Page 4961