Inlet Air Pressure Sensor (Service Code 12)
Inlet Air Pressure Sensor Removal
Never drop the sensor, especially on a hard surface.
Such a shock to the part can damage it.
Fuel Tank (see Fuel Tank Removal)
Disconnect the inlet air pressure sensor connector [B],
and remove the sensor [C].
Disconnect the vacuum hose [D] from the sensor.
Inlet Air Pressure Sensor Installation
Connect the inlet air pressure sensor connector [A].
Route the vacuum hose correctly (see Cable, Wire, and
Hose Routing section in the Appendix chapter). Make
sure it doesn't get pinched or kinked.
Install the inlet air pressure sensor [B].
The stopper [C] must not be on the sensor holder [D].
Torque - Inlet Air Pressure Sensor Bolt: 6.9 N·m (0.70
kgf·m, 61 in·lb)
Install the fuel tank (see Fuel Tank Installation).
Inlet Air Pressure Sensor Input Voltage Inspection
Be sure the battery is fully charged.
The inspection is the same as "Input Voltage Inspec-
tion" of the main throttle sensor and the atmospheric
Turn the ignition switch OFF.
Remove the ECU (see ECU Removal). Do not disconnect
the ECU connectors.
Connect a digital voltmeter to the connector, using the
needle adapter set.
Special Tool - Needle Adapter Set: 57001-1457
Inlet Air Pressure Sensor Input Voltage
Connections to ECU
(Without Oxygen Sensor Equipped Models [A])
Meter (+) → BL lead (terminal 8)
Meter (–) → BR/BK lead (terminal 22)
(Oxygen Sensor Equipped Models [B])
Meter (+) → BL lead (terminal 10)
Meter (–) → BR/BK lead (terminal 28)
Measure the input voltage with the engine stopped, and
with the connectors joined.
Turn the ignition switch ON.
Input Voltage at ECU
DC 4.75 ∼ 5.25 V
If the reading is less than the standard range, check the
ECU for its ground, and power supply and wiring shorted
(see ECU Power Supply Inspection). If the ground and
power supply are good, replace the ECU.
FUEL SYSTEM (DFI) 3-55