The clutch switch is used to detect gear change and impending engine load signals including de-clutching, first gear, and initial acceleration. The clutch switch also controls cancellation of cruise control. To prevent engine rpm surging when de-clutching (during gear changes), the ECM adjusts injector operation.
If the ECM does not receive the clutch signal, up to the speed of 80 Km/h, during two driving cycles, a DTC P0704 will occur.
DTC NO. | Detecting Condition | Possible Cause |
P 0704 | ● P 0704 Error is recognized if the clutch switch supplies no signal to the ECM until of the vehicle speed is reached to 80km/h ● Engine Condition : RUN ● Fuel Limit : NO ● Fuel Cut : NO ● EGR OFF : NO ● MIL : NO ● LIMP HOME MODE Cruise control system deactivited | ● Open or short in circuit ● Clutch s/w ● ECM |
