Supra L6-2997cc 3.0L DOHC MFI (1998)
(3) With engine idling, pinch the air assist hose and check that engine speed drops and then returns back up to idle speed.
If operation is not as specified, check the throttle body, wiring and ECM.
(f) After checking the above (b) and (e), perform the diving test and check that there is no sense of incongruity.
2. INSPECT THROTTLE CONTROL MOTOR
(a) Disconnect the throttle control motor connector.
(b) Using an ohmmeter, measure the resistance between terminal 3 (CL-) and 4 (CL+).
Resistance: 4.2-5.2 Ohms at 20°C (68°F)
(c) Using an ohmmeter, measure the resistance between terminal 1 (M+) and 2 (M-).
Resistance: 0.3-100 Ohms at 2O°C (68°F)
If the resistance is not as specified, replace the throttle control motor.
(d) Reconnect the throttle control motor connector.
3. INSPECT THROTTLE POSITION SENSOR
(a) Disconnect the throttle position sensor connector.
(b) Using an ohmmeter, measure the resistance between terminal VC and E2.
Resistance: 1.2 - 3.2 K ohms at 20°C (68°F)
If the resistance is not as specified, replace the throttle position sensor.
(c) Reconnect the throttle position sensor connector.
4. INSPECT ACCELERATOR PEDAL POSITION SENSOR
(a) Disconnect the accelerator pedal position sensor connector.
