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FUEL SYSTEM (DFI) 3-43
Inlet Air Pressure Sensor (Service Code 12)
CAUTION
Never drop the sensor, especially on a hard surface.
Such a shock to the part can dam age it.
Removal
•
Remove:
Fuel T
ank (see Fuel System chapter)
Water Temperature Sensor Connector [A]
Inlet Air Pressure Sensor Bolt [B]
•
Raise
the inlet air pressure sensor [C] and disconnect the
inlet air pressure sensor connector and the vacuum hose
[D].
Front
[E]
Installation
NOTE
○
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.
•
I
nstall:
Vacuum Hose
Inlet Air Pressure Sensor
Torque - Inlet Air P ressure S ensor Bolt: 12 N·m (1.2 kgf·m,
104 in·lb)
Input Voltage Inspection
NOTE
○
Be sure the battery is fully charged.
○
The inspection is the same as “ Input Voltage Inspection”
of the m ain throttle sensor or the atmospheric pressure
sensor.
•
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
•
Measure the input voltage with the engine stopped, and
with the connectors joined.
•
Turn the ignition switch ON.
Inlet Air Pressure Sensor Input Voltage
Connections to ECU
Meter (+)→ BL lead (terminal 1)
Meter (–) → BR/BK lead (terminal 14)
Standard: 4.75 ∼ 5.25 V DC
If the reading is within the standard range, check the sen-
sor output voltage.
If the reading is less than the standard range, remove the
ECU and check the wiring between these connectors.
If the wiring is good, check the ECU for its ground and
power supply (see ECU section).