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Home >> Toyota >> 2002 >> Prius L4-1.5L (1NZ-FXE) Hybrid >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Throttle Position Sensor >> Testing and Inspection
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Throttle Position Sensor: Testing and Inspection

ON-VEHICLE INSPECTION

1. INSPECT SYSTEM OPERATION
a. Disconnect the throttle control motor connector.
b. Turn the ignition switch ON.




c. Inspect the throttle position sensor function.
1. Connect the TOYOTA hand-helder tester to the DLC3.
2. When turning the throttle linkage to the full open position, check that the throttle valve opening percentage (THROTTLE POS) of the CURRENT DATA shows the standard value.

Throttle valve Opening percentage: 60 % or more
If operation is not as specified, check that the throttle position sensor, wiring and ECM.

d. Connect the throttle control motor connector.
e. Transit to the inspection mode and start the engine.
f. Allow the engine to warm up to normal operating temperature.
g. To check the charging rate of the HV battery, move the shift lever to D range and check that the engine stops.
If it does not stop, the charging rate may be low. With the shift lever in P range, keep running the engine for a while. Then, shift lever to D range again and check that the engine stops.

h. Start the engine.
i. Turn the A/C switch ON and OFF, and check the idle speed.
Idle speed (Transmission in neutral):
1,000 ± 50 rpm (A/C OFF)
1,200 ± 50 rpm (A/C ON)

NOTE: Perform inspection under condition without electrical load.

j. Stop the engine and disconnect TOYOTA hand-held tester from the DLC3.




2. INSPECT THROTTLE CONTROL MOTOR
a. Disconnect the throttle control motor connector.
b. Using an ohmmeter, measure the resistance between terminal M+ and M-.

Resistance: 0.3 - 100 Ohm at 20 °C (68 °F)
If the resistance is not as specified, replace the throttle body.




c. 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 terminals VC and E2.

Resistance: 1.2 - 3.2 kOhm 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
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