PLATE AS 1686761 - Caterpillar

System Operation Description:Use this procedure if one of the following switches is suspected of preventing normal operation of cruise control, idle set speed, or PTO operation:
Cruise control on/off switch
Cruise control set/resume switch
Cruise control pause switchThe following switch circuits can also prevent the correct operation of the cruise control, idle set speed or PTO operation:
Service brake pedal position (switch 1)
Service brake pedal position (switch 2)
Neutral switch
PTO on/off switchAll of the following customer programmable parameters can affect cruise control, idle set speed, and PTO operation:
"Adaptive Cruise Control Enable"
"Low Cruise Control Speed Set Limit"
"High Cruise Control Speed Set Limit"
"Idle Vehicle Speed Limit"
"Cruise/Idle/PTO Switch Configuration"
"Idle/PTO Bump rpm"
"Idle/PTO rpm Ramp Rate"
"PTO Kickout Vehicle Speed Limit"The vehicle speed calibration can also affect the cruise control, the idle set speed, and the PTO if the vehicle speed calibration is incorrectly programmed. Refer to Troubleshooting, "Customer Specified Parameters".Cruise Control On/Off SwitchThis switch must be on before cruise control or controlled idle can be activated. This switch is on when the switch is closed. When the switch is closed the following terminals are connected:
P1-5 (AP sensor/switch sensor common)
P1-59 (cruise control on/off switch)Note: If the vehicle is programmed to use the dedicated PTO, the PTO on/off switch overrides the cruise control on/off switch. The PTO on/off switch will override the cruise control on/off switch if the vehicle speed is within the programmed range for the "PTO Kickout Vehicle Speed Limit" parameter.Set/Resume SwitchWhile the cruise control on/off switch is in the ON position and the vehicle speed is within the range of the programmed "Low Cruise Control Speed Set Limit" and the "High Cruise Control Speed Set Limit", momentarily pressing the set switch will activate the cruise or controlled idle, and the Engine Control Module (ECM) will maintain the current speed.Pressing the resume switch will cause the vehicle speed to ramp to the last cruise control set speed. This assumes that the vehicle speed is above the "Low Cruise Control Speed Set Limit" for cruise control or the vehicle speed is below the Idle/PTO vehicle speed limit for the idle and the PTO.After a speed has been set, pressing and holding the set/resume switch in position will cause the engine to establish a new set speed. The system's reaction depends on the programming of the "Cruise/Idle/PTO Switch Configuration".When the set/resume switch is momentarily pressed, the current set point for the cruise will change one mph. The rate of change is dependent on the programmed "Idle/PTO Bump RPM" when an idle speed is set.Cruise Control Pause SwitchThe cruise control pause switch is used to temporarily disable cruise control. The cruise control cannot be set while the cruise control pause switch is in the ON position.Adaptive Cruise ControlThe adaptive cruise control is a J1939 based option. A radar unit is used in order to detect vehicles. When a vehicle is detected the cruise control set speed is reduced in order to maintain a following distance. This option must be enabled with the Caterpillar Electronic Technician (ET). Customer passwords are required to