Navistar Electrical Systems CV
Integration Guide
Page 27 of 84
Revision Date: 9/12/2019
3.11. PTO System Disengage Conditions
3.11.1. Stationary Modes [preset or variable] - in-cab control
To disengage PTO if one or more of the following actions are performed:
Depress the brake pedal. The engine returns to base idle, but the PTO
load relay remains engaged. The PTO Telltale will blink slowly indicating
that a PTO Set Speed is still stored in memory. Upon releasing the
brake, the factory default programming is for the engine speed to remain
at curb idle. Pressing and releasing the Cruise Res + Switch will restore
engine rpm to the last PTO Set speed. The PTO system can also be
programmed to return engine rpm to the PTO Standby Speed setting.
Depress the Cruise Cancel switch. The engine returns to base idle, but
the PTO load relay remains engaged. The PTO Telltale will blink slowly
indicating that a PTO Set Speed is still stored in memory. Activating the
Cruise Res + switch, will restore engine rpm to the last PTO Set speed.
Press and release the PTO in-cab switch. The PTO Load Relay will be
disengaged, and engine returns to base idle. The PTO Telltale will turn
OFF indicating the PTO Load Relay is disengaged and the stored set
speed has been cleared from memory.
Release Park Brake.
Move shift lever from PARK [P] position.
3.11.2. Stationary Modes [preset or variable] - remote control [with or without in-
cab engage]
To disengage PTO perform any of the following
actions:
Open the PTO Remote Engine Start/Shutdown switch. Load Relay
disengages, and engine will stop.
Assert the PTO Emergency Stop Switch. Load Relay disengages, and
engine will stop.
Press and release the In-cab PTO switch.
Stationary Modes will also disengage under the following conditions:
Vehicle movement is detected.
Park Brake is released.
Transmission is shifted out of PARK [P].
Ignition Key is cycled from
“Run/Crank” to “Off” position.
PTO feedback signal is lost [load disengaged] if used. See full system
schematic.
Cruise becomes ENABLED (Cruise ON/OFF switch pressed)