TESTING

1991–94 2TZ-FE Engine

1. To check the resistance between the terminals of the throttle position sensor, unplug the wiring from the unit.
2. Insert a thickness gauge between the throttle stop screw and lever.
3. Using an ohmmeter, check the resistance between each terminal.

   Fig. 1: Insert a thickness gage between the throttle stop screw and stop lever to check the throttle position sensor — 2TZ-FE engine

   Fig. 2: Throttle position sensor terminal locations — 2TZ-FE engine

   Fig. 3: Throttle position sensor resistance values — 1991–93 models

   Fig. 4: Throttle position sensor resistance values — 1994 models

4. If the testing is not up to specifications replace the sensor.
5. Reattach the sensor connector.

1995–97 2TZ-FE and 2TZ-FZE Engines

1. To check the resistance between the terminals of the throttle position sensor, unplug the wiring from the unit.
2. Disconnect the vacuum hose from the throttle opener.

   Fig. 5: Disconnect the vacuum hose from the throttle opener and insert a feeler gauge to test the throttle position sensor — 1995 models

   Fig. 6: Disconnect the vacuum hose from the throttle opener and insert a feeler gauge to test the throttle position sensor — 1996–97 2TZ-FZE engine

3. Apply vacuum to the feeler gage between the throttle stop screw and stop lever.
4. Using an ohmmeter, measure the resistance between each terminal.

   Fig. 7: Place the ohmmeter probes on each terminal of the throttle position sensor to measure the resistance

5. Reattach the throttle position sensor wiring.
6. Reconnect the vacuum hose to the throttle opener.

   Fig. 8: Throttle position sensor resistance values — 1995–97 2TZ-FE and 2TZ-FZE engines