The cruise control system keeps the vehicle running at a fixed speed until a signal canceling this fixed speed is received. When the main switch "AUTO CRUISE" is turned on with vehicle in the running mode, the battery voltage is applied to the ECM. When a signal from the control switch is input to the ECM while the vehicle is in state, the cruise control actuator is activates to operate the system. Also, while the system is operating, "AUTO CRUISE" indicator lamp in the meter assembly lights up. In case of the cruise control system failure, the engine symptoms will occur acceleration failure and vehicle speed setting failure
If the cruise control signal is low or high abnormally during two driving cycles, this code will be set.
DTC NO. | Detecting Condition | Possible Cause |
P 1660 | ● P 1660 ① Output signal < 250 mV ② Output signal > 4.9 V ③ Error is recognized if the vehicle speed governer is off when the resume inputs or if the vehicle speed governer is off when the cruise control SET+/SET- s/w inputs ● Engine Condition : RUN ● Fuel Limit : NO ● Fuel Cut : NO ● EGR OFF : NO ● MIL : NO | ● Open or short in circuit ● Cruise control ● switch ● ECM |
