Inlet Air Pressure Sensor (Service Code 12)
Never drop the sensor, especially on a hard surface.
Such a shock to the part can damage it.
Turn the ignition switch off.
Air Cleaner Housing (see Air Cleaner Housing Removal)
Inlet Air Pressure Sensor Connector [A]
Inlet Air Pressure Sensor Screw [B]
Inlet Air Pressure Sensor [C]
Vacuum Hose [D]
The inlet air pressure sensor is the same part as the at-
mospheric sensor except that the sensor has a vacuum
hose and different wiring.
Vacuum Hose [A]
Inlet Air Pressure Sensor [B]
Torque - Inlet Air Pressure Sensor Screw: 4.9 N·m (0.50
kgf·m, 43 in·lb)
[C] Vacuum Hoses
Input Voltage Inspection
Be sure the battery is fully charged.
The inspection is the same as "Input Voltage Inspection"
of the throttle sensor and the atmospheric pressure sen-
Turn the ignition switch OFF.
Remove the ECU (see this chapter). Do not disconnect
the ECU connectors.
Connect a digital voltmeter [A] to the connector [B], with
the needle adapter set.
Special Tool - Needle Adapter Set: 57001–1457
Inlet Air Pressure Sensor Input Voltage
Connections to ECU
Meter (+)→ BL lead (terminal 1)
Meter (–) → BR/BK lead (terminal 14)
Measure the input voltage with the engine stopped, and
with the connectors joined.
Turn the ignition switch ON.
Input Voltage at ECU
4.75 ∼ 5.25 V DC
If the reading is less than the standard range, check the
ECU for its ground, and power supply (see this chapter). If
the ground and power supply are good, replace the ECU.
FUEL SYSTEM (DFI) 3-71