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FUEL SYSTEM (DFI) 3-81
Subthrottle Sensor (Service Code 32)
•
Disconnect the subthrottle sensor connector [A] and con-
nect the harness adapter [B] between the harness con-
nector and subthrottle sensor connector.
Special Tool - Throttle Sensor Setting Adapter: 57001
-1538
•
Connect a digital meter to the harness adapter leads.
Subthrottle Sensor Input Voltage
Connections to Adapter
Meter (+) → BK (sensor BL) lead
Meter (–) → W (sensor BR/BK) lead
•
Measure the sensor input voltage with the engine
stopped, and with the connector joined.
•
Turn the ignition switch ON.
Input Voltage at Sensor
Standard: DC 4.75 ∼ 5.25 V
•
Turn the ignition switch OFF.
If the reading is out of the range, check the wiring (see
wiring diagram in this section).
If the reading is good, check the output voltage of the
sensor.
Output Voltage Inspection
•
Measure the output voltage at the ECU in the same way
as input voltage inspection. Note the following.
Digital Meter [A]
Connectors [B]
Special Tool - Needle Adapter Set: 57001-1457
Subthrottle Sensor Output Voltage
Connections to ECU Connector
Meter (+) → BL/W lead (terminal 27)
Meter (–) → BR/BK lead (terminal 34)
•
Turn the ignition switch ON.
•
Measure the output voltage when the subthrottle valve is
fully opened or completely closed by hand.
Output Voltage at ECU
Standard: DC 0.77 ∼ 4.22 V (at subthrottle valve full
opening to closing)
NOTE
○
The throttle sensor is operating correctly if the following
voltages are obtained:
• DC 0.77 V (or slightly higher) with the subthrottle valve
at the closed position.
• DC 4.22 V (or slightly lower) with the subthrottle valve
at the fully open position.
CAUTION
Do not remove or adjust the subthrottle sensor. It
has been adjusted and set with precision at the fac-
tory.
Never drop the throttle body assy, can especially
on a hard surface. Such a shock to the sensor can
damage it.
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