3-68 FUEL SYSTEM (DFI)
Main Throttle Sensor (Service Code 11)
Output Voltage Inspection
Measure the output voltage at the ECU in the same way
as input voltage inspection. Note the following.
Digital Voltmeter [A]
Special Tool - Needle Adapter Set: 57001–1457
Main Throttle Sensor Output Voltage
Connections to ECU
Meter (+) → Y/W lead (terminal 2)
Meter (–) → BR/BK lead (terminal 14)
Start the engine and warm it up thoroughly.
Check idle speed to ensure throttle opening is correct.
1 300 r/min (rpm)
If the idle speed is out of the specified range, adjust the
idle speed (see Idle Speed Inspection in Periodic Mainte-
Turn the ignition switch OFF.
Measure the output voltage with the engine stopped, and
with the connector joined.
Turn the ignition switch ON.
Measure the output voltage when the throttle is fully
opened or completely closed.
Output Voltage at ECU
1.02 ∼ 4.62 V DC (at idle throttle
opening to full throttle opening)
The throttle sensor is operating correctly if the following
voltages are obtained:
• 1.02 VDC (or slightly higher) with the throttle at the idle
• 4.62 VDC (or slightly lower) with the throttle at the fully
Do not remove or adjust the main throttle sensor.
It has been adjusted and set with precision at the
Never drop the sensor can especially on a hard sur-
face. A shock to the sensor can damage it.
If the output voltage is within the standard range, check
the ECU for a good ground, and power supply (see this
chapter). If the ground and power supply are good, re-
place the ECU.
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.