Glow Controller; Purpose; Location; How It Works - Toro 22317 Service Manual

4-PAW DIESEL/ELECTRICAL

Glow Controller

Purpose

1. When the ignition switch is placed in the RUN
position, the controller energizes the glow plugs and
lights the glow plug indicator lamp for 6 seconds
(Fig. 2058).
2. When the ignition switch is held in the START
position, the glow plugs will energize while the
switch is held and glow plug indicator light will not
light.
3. When the ignition switch is released from the START
to RUN, the glow plugs will de-energize and the glow
plug indicator light will remain off.
6/5-10
Fig. 2058 IMG-0552a

Location

The glow controller is attached to the wire harness and
is located under the 4-spool hydraulic valve above the
engine (Fig. 2059).
Note: The 4-spool valve has been removed for
photo clarity.

How It Works

The controller receives 12 volts from the key switch
when turned to the Run/On position and also powers the
glow plug light.
The controller provides power and ground to the glow
plug relay that provides voltage to the glow plugs.
The controller module has a built-in timer that limits the
time 12 volt power is provided to the glow plugs to pre-
heat the combustion chambers.
Toro Wheeled CUL Service Manual
Fig. 2059 DSC-3125