THROTTLE POSITION (TP) SENSOR CONSTRUCTION/OPERATION[ZJ, ZY, Z6]

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Without Throttle Valve Actuator

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TP sensor

•  A potentiometer type has been adopted.
•  Detects the fluctuation in voltage (variable resistance) of the throttle valve opening angle and inputs it to the PCM. The voltage input to the PCM increases proportionately to the increase in throttle valve opening angle.
•  Installed as connected to the valve shaft so that it corresponds to the opening and closing of the throttle valve.
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1
TP sensor
2
Throttle position sensor voltage characteristic
3
Throttle opening angle
4
Output voltage
5
Small
6
Large
7
Fully-closed
8
Fully-open


With Throttle Valve Actuator

•  The sensor is built into the throttle body and detects the throttle valve opening angle.
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1
Valve body
2
Throttle valve
3
TP sensor

•  The Hall element design has been adopted for the sensor.
•  A non contact type sensor has been adopted to improve durability.
•  The TP sensor is composed of the main sensor and sub sensor, and detects the throttle valve opening angle with these two sensors (main and sub).
•  Even if a malfunction occurs in either one of the sensors, the detection is performed with a normal sensor and drive-by-wire control is maintained.
•  If both the MAIN and SUB sensors for the TP sensor malfunction, signals necessary for the drive-by-wire control are not input to the PCM and the drive-by-wire control is disabled.
•  However, even though the drive-by-wire control is disabled, the throttle valve opening angle necessary for minimum driving is maintained mechanically.

TP Sensor Voltage Characteristics

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1
APP sensor
2
Hall element sensor
3
Magnet
4
Main sensor
5
Sub-sensor
6
Accelerator pedal depression amount
7
Output voltage
8
Large
9
Small
10
High
11
Low