11 PROBLEM SOLVING
71
11.2 CONTROLLER ____________________________________________________________
The Mower Controller is a solid state device that monitors and controls the electrical functions of the mower. The
controller receives the input signals from switches and sensors in the mower. The controller sends the output signals to
operate relays, solenoids and warning lights. The controller controls and sets the timers and includes logic to control
some mower functions.
Each input and output signal is shown by Light Emitting Diodes (LED) found on the front of the controller. A closed input
switch indicates an active circuit and will illuminate the related LED. An open switch indicates a circuit that is not active
and will turn off the related LED. When the LED is illuminated, the output circuit is active.
Some controller outputs need a group of conditions set before the controller sends the output signal.
For example, to send the output to start the engine (LED No. 3) all of these conditions must be true.
• The PTO switch is turned off. (LED No. 22 OFF)
• The parking brake switch is turned on. (LED No. 35 ON)
• The neutral switch is turned on. (LED No. 30 ON)
• The ignition switch is turned to start. (LED No. 23 ON)
When you use the controller to find a solution to a mower problem, always make sure that the ignition power status
LED No. 2 is illuminated. This LED indicates that the controller is active. The controller needs a minimum of 6 volts to
operate.
Test each circuit and check for the LED to illuminate when you activate or adjust the switch. If an input LED does not
illuminate, a not active condition is indicated. A not active condition could be caused by a blown fuse, a defective switch
or bad electrical connections. Not all of the switches are found on the instrument panel. Refer to the Parts Manual to
find switch locations.
NOTICE
For factory help with controller problems, give the hardware revision and software version found on the controller.
The replacement controllers with higher revision levels will be compatible.
1-5 POWER - LIGHTS
1-3 POWER - IGNITION
1-1 START RELAY/ECU
2-5 HYD OIL LEVEL LT
2-6 TRACTION CTRL LT
2-4 PARK BRAKE LT
2-3 BRAKE SOL
2-2 RW LIFT SOL
2-1 WG MOW MAIN SOL
2-11 LW LIFT SOL
2-12 WG LIFT MAIN SOL
2-10 LW MOW SOL
2-9 RW MOW SOL
2-8 LOWER 5 GANG SOL
2-7 ECU IGN
3-6 HORN
3-5 LIFT 5 GANG SOL
3-4 MOW 5 GANG SOL
4-6 HYD FILTER LT
4-5 ECU NEUTRAL
3-1 ECU MAIN RELAY
3-10 MOW ENBL SW
3-11 KEY START
3-9 SEAT SW
3-8 ENG OIL SW
3-7 ENG WATER TEMP
4-4 LW ENABLE SW
4-3 TRACTION CTRL SW
4-2 RW ENABLE SW
4-1 NEUTRAL SW
4-10 JOYST LOWER
4-11 JOYST LIFT
4-7 RW LIMIT SW
4-8 LW LIMIT SW
4-9 BRAKE SW
4-12 HYD OIL LEVEL SW
COMM STATUS
POWER STATUS
FUSES
20 AMPS MAX
POWER INPUT 1
POWER INPUT 2
OUTPUTS
INPUTS
20
20
JACOBSEN
4270813
MTI500819
REV X2
DATE YYWW
SOFTWARE
9585$
RoHS
Compliant
LED No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
LED No.
37
38
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