Hour Meter; Electronic Control Unit (Ecu); Parking Brake Switch - Toro Reelmaster 5500-D Service Manual

Hour Meter

The meter is either located on the control panel or under
the control panel inside the control console.
1. Connect the positive (+) terminal of a 12 VDC source
to the positive terminal of the hour meter.
2. Connect the negative (-) terminal of the voltage
source to the other terminal of the hour meter.
3. The hour meter should move a 1/10 of an hour in six
minutes.
4. Disconnect voltage source from the hour meter.

Electronic Control Unit (ECU)

The Toro electronic control unit (ECU) senses the condi-
tion of various switches, such as the seat sensor, cutting
unit down switches, traction neutral switch, etc., and di-
rects power output to allow certain machine functions,
such as engine run, cutting units engage, etc.
Because of the solid state circuitry built into the control-
ler, there is no method to test it directly. The controller
may be damaged if an attempt is made to test it with an
electrical test device, such as a volt-ohm meter.
IMPORTANT: Before performing welding on the ma-
chine, disconnect both battery cables from the bat-
tery, disconnect both wire harness connectors from
the electronic control unit and disconnect the termi-
nal connector from the alternator to prevent dam-
age to the electrical system.

Parking Brake Switch

The parking brake switch is a proximity switch located
inside the steering tower. When functioning properly,
this feature kills the engine when the forward/reverse
pedal is depressed and the parking brake is On.
For units with serial number 200000001 to 209999999,
the switch is closed to ground (orange/brown wire to
black wire) when the parking brake is On.
For units with serial number 210000001 and Up, the
switch is closed to ground (orange/brown wire to black
wire) when the parking brake is Off.
Electrical System (Rev. C)
2
1. Electronic control unit
(ECU)
1. With the parking brake engaged, separate the termi-
nal connector and measure resistance between the
switch connector pins. Resistance should read as a
closed circuit (200000001 to 209999999) or as an open
circuit (210000001 and Up).
2. Release the parking brake and measure resistance
between the switch connector pins. Resistance should
read as an open circuit (200000001 to 209999999) or as
a closed circuit (210000001 and Up).
3. Adjust the position of the proximity switch as neces-
sary to obtain the above results.
Page 5 - 28
Hobbs
QUARTZ
1
0 0 0 0 1
10
HOURS
+
BACK
Figure 35
1
Figure 36
2. Control panel
Reelmaster 5500-D