Prepare an auxiliary fuel tank and connect the fuel hose to the carburetors.
Start the engine and warm it up thoroughly.
Check:
- Idle Speed (see Fuel System chapter)
- Battery Charging Condition (see this chapter)
Turn off the ignition switch.
Remove the throttle sensor lead connector.
Connect the adapter [B] between the connectors [A].

Special Tool - Throttle Sensor Setting Adapter: 57001-1408
Connect the hand tester to the adapter.
- Hand Tester (+) → Y/W Lead [C]
- Hand Tester (-) → BK/BL Lead [D]
Starter the engine.
Check the sensor output voltage with the engine idling.
Throttle sensor output voltage. Standard: 0.95-1.05 V (When engine is idling).
★ If it is not within the specified voltage, adjust the throttle sensor position (see Throttle Sensor Position Adjustment).
★ If it is specified voltage, go to next test.
Stop the engine.
Turn on the ignition switch.
Check the sensor output voltage with the throttle fully open.
Throttle sensor output voltage. Standard: 3.95-4.15 V (When throttle is fully opened).
★ If it is not within the specified voltage, replace the sensor.