Service manual

FUEL SYSTEM (DFI) 3-51
Inlet A ir Temperature Sensor (Service Code 13)
Inlet Air Temperature Sensor Removal/Installation
CAUTION
Never drop the sensor, especially o n a hard surface.
Such a shock to the sensor can damage it.
•
Remove the air cleaner (see Air Cleaner Housing Re-
moval).
•
Remove the screw [A].
•
Pull out the inlet air temperature sensor [B].
•
Put the inlet air temperature sensor into the air cleaner
housing.
•
Tighten the screw securely.
Inlet A ir Temperature Sensor Output Voltage
Inspection
NOTE
○
Be sure the battery is fully charged.
○
The output voltage changes according to the inlet air
temperature.
•
Remove the ECU (see ECU Removal).
○
Do not disconnect the ECU connectors.
•
Connect a digital meter to the ECU connector, using nee-
dle adapter set.
Special Tool - Needle Adapter Set: 57001-1457
Inlet Air Temperature Sensor Output Voltage
Connections to ECU Connector
Meter (+) → Y lead (terminal 2)
Meter (–) → BR/BK lead (terminal 10)
•
Measure the output voltage with the engine stopped and
the connecto
r joined.
•
Turn the ignition switch ON.
Output Voltage at ECU
Standard:
About 2.26 ∼ 2.50 V at inlet air temperature
25°C (77°F)
•
Turn the ignition switch OFF.
If the output voltage is out of the standard, check the
wiring.
If the wiring is good, check the sensor resistance (see
Inlet Air Temperature Sensor Resistance).
If the output voltage is within the standard, 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 Removal/Installation).