DTC 14

Operation

The throttle-position sensor functions to convert the degree at opening of the throttle valve to voltage, and to input that voltage (as signals) to the engine control module. The engine control module, based upon those signals, then regulates the amount of fuel injection, etc.

The 5V power supply within the engine control module is supplied to the throttle-position sensor, after which it passes through the resistance within the sensor and is grounded at the engine control module.

When the throttle valve shaft is rotated all the way from the idling position to the fully open position, the resistance between the throttle position sensor's variable-resistance terminal and the ground terminal also increases in accordance with that rotation, and, as a result, the voltage of the throttle-position sensors variable-resistance terminal also becomes higher in accordance with that rotation.


Troubleshooting Hints


Hint 1:

The signals of the throttle-position sensor are more important for control of the automatic transaxle than for control of the engine; shifting impact shocks are produced if there is a malfunction of the throttle-position sensor.

Hint 2:

If the voltage of the throttle-position sensor deviates from the standard value, check once again after making the throttle-position sensor adjustment.





Inspection





Harness Inspection


Sensor Inspection

(1) Disconnect the throttle position sensor connector, and connect the special tool (Test harness) between the disconnected connectors.










(2) Measure the resistance between terminal 1 (black clip of special tool) and terminal 2 (red clip) of the connector on throttle position sensor side.

Standard value: 3.5-6.5 k/ohms


(3) Measure the resistance between terminal 2 (blacK clip of special tool) and terminal 3 (blue clip).
(4) If the resistance does not conform with specification or does not vary smoothly, replace the throttle position sensor.

Throttle position sensor installation torque: 1.5-2.5 Nm (1.1-1.8 ft.lbs.)