TOYOTA PREVIA 91-97 REPAIR MANUAL

DRIVEABILITY AND EMISSIONS CONTROLS 4-27

Insert a thickness gauge between the throttle stop screw and lever.

Using an ohmmeter. check the resistance between each terminal.

If the testing is not up to specifications replace the sensor.

Reattach the sensor connector.

1995-97 2TZ-FE and 2TZ-FZE Engines

» See Figures 83, 84, 85 and 86

To check the resistance between the terminals of the throttle position
sensor, unplug the wiring from the unit.

Disconnect the vacuum hose from the throttle opener.

Apply vacuum to the feeler gage between the throttle stop screw and
stop lever.

Using an ohmmeter measure the resistance between each terminal.

Reattach the throttle position sensor wiring.

Reconnect the vacuum hose to the throttle opener.

REMOVAL & INSTALLATION

I See Figure 87

Remove the mounting screws and extract the sensor.

Fig. 85 Place the ohmmeter probes on each terminal of the throttle position sensor to measure the resistance

0.60 or 1.05 mm Feeler Gauge V

Fig. 83 Disconnect the vacuum hose from the throttle opener and insert a feeler gauge to test the throttle position sensor— 1995 models

Clearance between lever and stop screw 0 mm (0 in.) 0.60 mm {0.023 in.) 1.05 mm (0.041 in.) Throttle valve fully open

Between terminals

VTA - E2 IDL - E2 IDL - E2

VTA - E2

VC - E2

Resistance

0.2 - 5.7 kD 2.3 kO or less Infinity

2.0 - 10.2 kO

2.5 - 5.9 kQ 90914G74

Fig. 86 Throttle position sensor resistance values— 1995-97 2TZ-FE and 2TZ-FZE engines

0.50 or 0.95 mm Feeler Gauge

Disconnect

Fig. 84 Disconnect the vacuum hose from the throttle opener and insert a feeler gauge to test the throttle position sensor— 1996-97 2TZ-FZE engine

Fig. 87 The throttle position sensor is located on the side of the throttle body