TOYOTA PREVIA 91-97 REPAIR MANUAL

4-12 DRIVEABILITY AND EM SSIONS CONTROLS Engine Stopped „ 190914625 Fig. 29 Inspecting the EGR vacuum modulator with the engine ...

DRIVEABILITY AND EMISSIONS CONTROLS 4-13 EGR GAS TEMPERATURE SENSOR I See Figure 34 Remove the EGR gas temperature sensor. Plac ...

4-14 DRIVEABILITY AND EM SSIONS CONTROLS EGR VALVE Remove the EGR valve. Check the valve for sticking and heavy carbon deposits ...

DRIVEABILITY AND EMISSIONS CONTROLS 4-15 REMOVAL & INSTALLATION Bimetal Vacuum Switching Valve (BVSV) I See Figures 40 and 4 ...

4-16 DRIVEABILITY AND EMISSIONS CONTROLS Fig. 43 Testing the check valve for air flow on each side Fig. 45 EGR vacuum modulator ...

DRIVEABILITY AND EMISSIONS CONTROLS 4-17 EGR Vacuum Modulator » See Figure 47 Unbolt the vacuum modulator bracket and extract. ...

4-18 DRIVEABILITY AND EMISSIONS CONTROLS From under the drivers seat, unbolt the ECM from the leg. Carefully disengage the 3 ha ...

DRIVEABILITY AND EMISSIONS CONTROLS 4-19 REMOVAL & INSTALLATION » See Figures 50 thru 55 The oxygen sensor can be located in ...

4-20 DRIVEABILITYANDEMl:5SIONS CONTROLS Fig. 55 ... and the old gasket To install: »Durint| and after the removal, use great car ...

DRIVEABILITY AND EMISSIONS CONTROLS 4-21 hose. In this way the intake air volume bypassing the throttle valve is regu- lated, co ...

4-22 DRIVEABILITY AND EMISSIONS CONTROLS Fig. 62 Use an ohmmeter to measure the resistance betwei n the terminals of the IAC val ...

DRIVEABILITY AND EMISSIONS CONTROLS 4-23 Fig. 66 Test both terminals of the coolant temperature sensor using an ohmmeter With t ...

4-24 DRIVEABILITY AND EMJSSIONS CONTROLS Between terminals VS - E2 VC - E2 THA - E2 THA - E2 THA - E2 THA - E2 THA - E2 THA - E2 ...

DRIVEABILITY AND EMISSIONS CONTROLS 4-25 Thermistor Platinum Hot Wire Fig. 74 Cutaway view of the thermistor in the airflow mete ...

4-26 DRIVEABILITY AND EMISSIONS CONTROLS Air Cleaner Cap MAP Meter Fig. 78 View of the Mass Airflow Meter and surrounding compo- ...

DRIVEABILITY AND EMISSIONS CONTROLS 4-27 Insert a thickness gauge between the throttle stop screw and lever. Using an ohmmeter. ...

4-28 DRIVEABILITY AND EMI3SIONS CONTROLS To install: Make certain the throttle plate is fully closed. With the throttle held in ...

DRIVEABILITY AND EMISSIONS CONTROLS 4-29 TESTING 1991 Models I See Figure 91 Using a suitable ohmmeter, check the resistance co ...

4-30 DRIVEABILITY AND EMISSIONS CONTROLS COMPONENT LOCATIONS Main Oxygen Sensor / Sub-Oxygen Sensor Circuit Opening Relay EFI Ma ...

DRIVEABILITY AND EMISSIONS CONTROLS 4-31 TROUBLE CODES General Information I See Figure 95 The ECM contains a built-in, self-dia ...