ETC(Electronic Throttle Control Valve) is the device controlling amount of air to engine acccording to driver’s intension. Different from the existing mechanical throttle valve which is composed of accelerator pecal and connecting wire cable, ETC consists of a motor, a throttle body and a throttle position sensor. Receiving input signals from electronic accelerator pedal module, PCM lets ETC motor control throttle valve. With ETC, cruise control system works without any additional device.
Checking output signals from TPS1 every 8.5 sec. under detecting condition, if an output signal is above 4.75V for more than 0.1 sec., PCM sets P0123. MIL(Malfunction Indication Lamp) turns on when the malfunction lasts till consecutive 2 driving cycle.
Item
Detecting Condition
Possible Cause
DTC Strategy
? Signal high
? Poor connection
? Open or short to battery in signal harness
? Open in ground harness
? TPS
? PCM
Enable Condition
? IG "ON
Threshold Value
? The voltage of TPS >4.75V
Diagnosis Time
? Continuous (More than 0.1 sec. failure for every 8.5 sec.test)
MIL On Condition
? 2 driving cycles
Throttle opening ( ° )
Output voltage(V) [Vref=5.0]
TPS1
TPS2
0°
0.0V
5.0V
60°
2.7V
2.3V
10°
0.5V
4.5V
70°
3.2V
1.8V
20°
0.9V
4.1V
80°
3.6V
1.4V
30°
90°
40°
100°
50°
110°