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3-82 FUEL SYSTEM (DFI)
Subthrottle Sensor (Service Code 32)
If the output voltage is within 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 Removal).
If the output voltage is far out of the standard range (e.g.
when the wiring is open, the reading is 0 V), check the
output voltage again at the sensor connector.
•
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 Harness Adapter: 57001
-1538
•
Connect a digital meter to the harness adapter leads.
Subthrottle Sensor Output Voltage
Connections to Adapter
Meter (+) → R (sensor BL/W) lead
Meter (–) → W (sensor BR/BK) lead
•
Measure the sensor output voltage with the engine
stopped, and with the connector joined.
•
Turn the ignition switch ON.
•
Measure the output voltage when the subthrottle valve is
fully opened or completely closed by hand.
Output Voltage at Sensor
Standard: DC 0.77 ∼ 4.22 V (at subthrottle valve full
openingtoclosing)
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, especially on a
hard surface. Such a shock to the sensor can dam-
age it.
NOTE
○
The standard voltage refers to the value when the volt-
age reading at the Input Voltage Inspection shows 5V
exactly.
○
When the input voltage reading shows other than 5V,
derive a voltage range as follows.
Example:
In the case of a input voltage of 4.75 V.
0.77 × 4.75 ÷ 5.00 = 0.73 V
4.22 × 4.75 ÷ 5.00 = 4.01 V
Thus, the valid range is 0.73
∼
4.01 V
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