COMPONENT LOCATION |
GENERAL DESCRIPTION |
The Electronic Throttle Control(ETC) system consists of the throttle body, Throttle Position Sensor(TPS)1&2 and Accelerator Position Sensor(APS) 1&2. TPS1&2 are sharing the same source voltage and ground. The ECM controls the throttle motor to open and close the throttle valve. The TPS1 output voltage increases smoothly in proportion with the throttle valve opening angle after starting. TPS2 output voltage decreases in inverse proportion with the throttle valve opening angle after starting. The TPS provides feedback to the ECM to control the throttle motor in order to control the throttle valve opening angle properly in response to the driver’s demands.
DTC DESCRIPTION |
Checking output signals from TPS2 every 8.5 sec. under detecting condition, if an output signal is above 4.75V for more than 0.1 sec., ECM sets P0223.
DTC DETECTING CONDITION |
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Item | Detecting Condition | Possible Cause | ||||||||||||
DTC Strategy |
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Enable Conditions |
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Threshold value |
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Diagnosis Time |
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MIL On Condition |
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SPECIFICATION |
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Throttle Opening (°) | Output Voltage (V) [Vref=5.0] | |
TPS1 | TPS2 | |
0° | 0.0V | 5.0V |
10° | 0.5V | 4.5V |
20° | 0.9V | 4.1V |
30° | 1.4V | 3.6V |
40° | 1.8V | 3.2V |
50° | 2.3V | 2.7V |
60° | 2.7V | 2.3V |
70° | 3.2V | 1.8V |
80° | 3.6V | 1.4V |
90° | 4.1V | 0.9V |
100° | 4.5V | 0.5V |
110° | 5.0V | 0.0V |
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DIAGNOSTIC CIRCUIT DIAGRAM |
SIGNAL WAVEFORM & DATA |
Fig.1) Normal data & waveform of TPS1 & TPS2 with no accel padal depressed under IG ON condition
Fig.2) Normal data & waveform of TPS1 & TPS2 with accel padal depressed under IG ON condition
Fig.3) Abnormal data of TPS1 & TPS2 under open condition
MONITOR GDS DATA |
1. | Connect GDS to Data Link Connector(DLC). |
2. | IG “ON”. |
3. | Select “DTC” button, and then Press “DTC Status” to check DTC’s information from the DTCs menu. |
4. | Read “DTC Status” parameter. |
5. | Is parameter displayed “Present fault”? Â
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TERMINAL AND CONNECTOR INSPECTION |
1. | Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage. |
2. | Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. |
3. | Has a problem been found? Â
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SIGNAL CIRCUIT INSPECTION |
â– Check voltage |
1. | IG “OFF” and disconnect ETC Motor & TPS connector. |
2. | IG “ON”. |
3. | Measure voltage between TPS2 signal terminal of ETC Motor & TPS harness connector and chassis ground.
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4. | Is the measured voltage within specification ? Â
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â– Check short to battery in harness |
1. | IG “OFF” and disconnect ETC Motor & TPS connector and ECM connector. |
2. | Measure resistance between TPS2 signal and TPS power terminals of ETC Motor & TPS harness connector.(Measurement “A”) |
3. | Measure resistance between TPS2 signal and ETC motor(+) terminals of ETC Motor & TPS harness connector.(Measurement “B”) |
4. | Measure resistance between TPS2 signal and ETC motor(-) terminals of ETC Motor & TPS harness connector.(Measurement “B”)
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5. | Is the measured resistance within specification ? Â
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GROUND CIRCUIT INSPECTION |
â– Check open in harness |
1. | IG “OFF” and disconnect ECTS connector and then IG “ON”. |
2. | Measure voltage between TPS power terminal of ETC Motor & TPS harness connector and chassis ground.(Measurement “A”) |
3. | Measure voltage between TPS power and TPS ground terminals of ETC Motor & TPS harness connector.(Measurement “B”)
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4. | Is the measured voltage within specification ? Â
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COMPONENT INSPECTION |
â– Check TPS resistance |
1. | IG “OFF” and disconnect ETC Motor & TPS connector. |
2. | Measure resistance between TPS power and TPS ground terminals of ETC Motor & TPS connector.(component side)
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3. | Is the measured resistance within specification ? Â
※ Procedure of ETS Initialization
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