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3-56 FUEL SYSTEM (DFI)
Inlet Air Pressure Sensor (Service Code 12)
CAUTION
Never drop the sensor, especially on a hard surface.
Such a shock to the part can damage it.
Removal
•
Turn the ignition switch OFF.
•
Remove:
Air Cleaner Housing (see Air Cleaner Housing Removal)
Inlet Air Pressure Sensor Connector [A]
Inlet Air Pressure Sensor [B]
Vacuum Hose
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.
•
Install the vacuum hose.
•
Put the inlet air pressure sensor in the stay plate [A] of
throttle body assy.
Input Voltage Inspection
NOTE
○
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-
sor.
•
Turn the ignition switch OFF.
•
Remove the ECU (see ECU Removal).
○
Do not disconnect the ECU connectors.
•
Connect a digital meter [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 Connector
Meter (+)→ BL lead (terminal 7)
Meter (–) → BR/BK lead (terminal 34)
•
Measure the input voltage with the engine stopped, and
with the connectors joined.
•
Turn the ignition switch ON.
Input Voltage at ECU
Standard: DC 4 .75 ∼ 5.25 V
If the reading is less than the standard range, check the
ECU for its ground, and power supply (see ECU Power
Supply Inspection). If the ground and power supply are
good, replace the ECU (see ECU section).
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