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SEF065T SEF580R SEF749W Procedure for malfunction B. OVERALL FUNCTION CHECK Use this procedure to check the overall function of the secondary WARNING: Before touching the secondary throttle valve, be sure to dis- 1) Start engine and warm it up to normal operating tem- perature. 2) Turn ignition switch “OFF” and disconnect throttle motor harness connector. 3) Remove intake air duct. MONITOR” mode with CONSULT-II. 6) Select “THRTL/P SEN2” in “DATA MONITOR” mode with CONSULT-II. 7) Press RECORD on CONSULT-II SCREEN at the same time close the secondary throttle valve by hand. 8) Print out the recorded data and check the following: I The voltage when secondary throttle valve is closed I The voltage decrease is linear in response to second- I The voltage when secondary throttle valve is fully 9) If NG, go to “DIAGNOSTIC PROCEDURE”, EC-379. ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ 1) Start engine and warm it up to normal operating tem- perature. 2) Turn ignition switch “OFF” and disconnect throttle motor harness connector. 3) Remove intake air duct. q 66 and ground, then check the following: I The voltage when secondary throttle valve is closed I The voltage decrease is linear in response to second- I The voltage when secondary throttle valve is fully 6) If NG, go to “DIAGNOSTIC PROCEDURE”, EC-379. GI MA EM LC FE AT PD FA RA BR ST RS BT HA EL IDX TROUBLE DIAGNOSIS FOR DTC P1120 Secondary Throttle Position Sensor (STPS) EC-377 |