Component Location
General Description

The Electronic Throttle Control(ETC) system which is composed of throttle body, Throttle Position Sensor(TPS)1&2 and Accelerator Position Sensor(APS) 1&2 controls the mass of airflow by driver's intention. The throttle valve opening is control by throttle motor which is controlled by ECM. TPS is a variable resistance and its value is cahnged by open angle of throttle valve.

DTC Description

If the sensor input voltage is lower than the minimum threshold value during 0.14 sec under normal driving condition, ECM sets DTC P0122.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

•

Signal check, low

1.

Poor connection

2.

Open or short to ground in power circuit

3.

Short to ground in signal circuit

4.

TPS

Enable Conditions

•

IG "ON"

Threshold Value

•

TPS1 voltage < 0.176

Diagnostic Time

•

0.14 sec

MIL ON Condition

•

5 sec

Diagnostic Circuit Diagram
note
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Signal Waveform & Data

Normal waveform of TPS1 & TPS2 with no accel padal depressed under IG ON condition

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