Clutch switch is connected to clutch pedal and transmits clutch operating state to ECM. When clutch pedal is depressed during driving, engine load changes from loaded to none loaded condition. However, ECM considers vehicle to be loaded becuase VSS signal is still inputted to it. therefore, ECM controls none loaded engine with the condition suitable for loaded engine. Accordingly, optimum fuel injection control is not performed then, RPM becomes unstable and smoke is produced. Clutch operation is detected through clutch switch signal. This signal enables ECM to cope with instant change of load condition. Besides, clutch switch signal is used to detect engaged gear with vehicle speed and engine speed.
P0830 is set when no clutch switch signal change is detected while gear shifts 4 times at above 15Km/h and 1500rpm. This code is due to 1) clutch switch component failure or 2) open or short in circuit 3) improper height of clutch pedal.
※ ECM recognizes ingaged gear with rpm and vehicle speed sensor signal.
Item | Detecting Condition | Possible Cause | ||
DTC Strategy | ● Signal monitoring | ● Clutch S/W circuit ● Clutch S/W component ● Clutch S/W pedal hight | ||
Enable Conditions | ● Engine running | |||
Threshold Value | ● No clutch switch signal change is detected until gear shifts 3 times at above 1500rpm. | |||
Diagnostic Time | ● Immediately | |||
Fail Safe | Fuel Cut | NO | ||
EGR Off | NO | |||
Fuel Limit | NO | |||
Check Lamp | OFF | |||
Condition | Clutch Pedal Depressed | Clutch Pedal Released |
Switch Operation | Switch ON | Switch OFF |
Even though clutch pedal is not depressed just after turning engine on, signal voltage is outputted as 0V. Therefore even if clutch pedal is not depressed, engine can be turned on. However, if pedal is depressed once, clutch switch signal is no more 0V. In this case, turning engine on is possible only when clutch pedal is depressed.
