Main Throttle Sensor (Service Code 11)
Main Throttle Sensor Output Voltage Inspection
Measure the output voltage at the main throttle sensor
in the same way as input voltage inspection, Note the
Disconnect the main throttle sensor connector and con-
nect the harness adapter [A] between these connectors.
Special Tool - Throttle Sensor Harness Adapter: 57001
Start the engine and warm it up thoroughly.
Check idle speed to ensure the throttle opening is correct.
1 300 ±50 r/min (rpm)
If the idle speed is out of the specified range, adjust it
(see Idle Speed Inspection in the Periodic Maintenance
Turn off the ignition switch.
Measure the output voltage of the sensor with the engine
stopped, and with the connector joined.
Turn the ignition switch ON.
Main Throttle Sensor Output Voltage
Connections to Adapter
Meter (+) → R (sensor Y/W) lead
Meter (–) → W (sensor BR/BK) lead
1.073 ∼ 1.077 V DC (at idle throttle opening)
4.29 ∼ 4.49 V DC (at full throttle opening)
If the output voltage is out of the standard, inspect the
main throttle sensor resistance.
If the output voltage is normal, check the wiring for conti-
ECU Connector [A] ←→ Throttle Sensor Connector [B]
Y/W lead (ECU terminal 7)
BR/BK lead (ECU terminal 28)
If the wiring is good, check the ECU for its ground and
power supply (see ECU Power Supply Inspection).
FUEL SYSTEM (DFI) 3-45