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3-66 FUEL SYSTEM (DFI)
Atmospheric Pressure Sensor (Service C ode 15)
CAUTION
Never drop the sensor, especially on a hard surface.
Such a shock to the sensor can damage it.
Removal
•
Turn the ignition switch OFF.
•
Remove:
Seat Cover (see Seat Cover Removal in the Frame
chapter)
Atmospheric Pressure Sensor Connector [A]
Damper [B]
Atmospheric Pressure Sensor [C]
Installation
NOTE
○
The atmospheric pressure sensor is the same part as
the inlet air pressure sensor except that the inlet air
pressure sensor has a inlet air pressure hose and dif-
ferent wiring.
•
Installation is reverse of removal.
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 inlet air pressure sensor.
•
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
Atmospheric 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 of input voltage 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 sec-
tion).
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