Throttle Body (SMT)

THROTTLE BODY (SMT)

ON-VEHICLE INSPECTION

1. INSPECT SYSTEM OPERATION




a. Check that the throttle linkage moves smoothly.




b. Inspect the operating sound of the throttle control motor.
1. Turn the ignition switch ON.
2. When turning the accelerator pedal position sensor lever, check the running sound of the motor. Also, check that there is no friction sound.
If the operation is not as specified, check the throttle control motor wiring and ECM.




c. Inspect the accelerator pedal position sensor.
1. Connect the hand-held tester to the DLC3.
2. Check that the MIL does not light up.
3. When turning the accelerator pedal position sensor lever to the full-open position, check that the throttle valve opening percentage (THROTTLE POS) of the CURRENT DATA shows the standard value.

Standard throttle valve opening percentage: 60 % or more

If the operation is not as specified, check that the accelerator pedal position sensor wiring and ECM.




If you have no hand-held tester, measure the voltage between terminals VPA and E2 of the ECM connector.

d. Inspect the air assist system.
1. Start the engine and check that the MIL does not light up.
2. Allow the engine to warm up to normal operating temperature.
3. Turn the A/C conditioning switch ON to OFF, and check the idle speed.

Idle speed (Transmission in neutral): 750 ± 50 rpm

NOTE: Perform an inspection without electrical load.

e. After checking the above (b) to (d), perform the driving test and check that there is no incongruity.