Service Manual

Multi Pro 5800 Page 6 − 7 Electrical System
Traction Speed Sensor Test Harness
NOTE: Based on harness length, speed sensor testing
can be performed while driving machine in an open area
or while the machine is stationary. Stationary testing re-
quires an assistant and using jack stands to get the rear
wheels off the ground.
Special Tools Needed
Traction speed sensor test harness (available to au-
thorized Toro Distributors or fabricated using the in-
formation provided here)
Multimeter with frequency measurement capability
(12V square wave)
Instructions
1. Park machine on a level surface, stop engine and en-
gage parking brake. Remove key from ignition switch.
2. Disconnect sensor from wire harness and check wire
harness for circuit problems before testing speed sen-
sor (see Traction Speed Sensor in the Component Test-
ing section of this chapter).
3. With sensor installed in wheel motor, connect trac-
tion speed sensor test harness between sensor and ma-
chine harness.
4. Plug white wire (red test harness connector) into the
positive voltage port on the multimeter and black wire
(black test harness connector) into ground port on the
multimeter.
5. Set multimeter to measure frequency (12V square
wave).
6. Start and drive machine while watching the meter.
The frequency should increase when vehicle speed in-
creases if the sensor is functioning appropriately.
7. If frequency is not registered, is erratic, or does not
increase when increasing speed, verify orientation of
grooves on sensor body. The grooves must be aligned
perpendicular to wheel motor shaft (see Traction Speed
Sensor in the Service and Repairs section of this chap-
ter). If the sensor grooves are not aligned:
A. Loosen sensor lock nut.
B. Rotate sensor clockwise (sensor turns into the
port) until grooves are aligned.
C. Tighten the lock nut from 75−125 in−lbs (8.5 to
14 N−m) and re−test.
Figure 7
Traction Speed Sensor Test Harness
TO SPEED SENSOR
PAKARD 12015793
FEMALE CONNECTO
R
NEGATIVE (−)
CONNEECTORS COMPATIBLE WITH
MULTIMETER USED
POSITIVE (+)
14 ft (4.27 m)
TO SAFELY REACH
OPERATOR SEAT
TO MACHINE HARNESS
PAKARD 12010717
MALE CONNECTOR
8. If frequency continues to not register, is erratic, or
does not increase when increasing speed, remove and
re−install sensor.
A. Remove sensor from wheel motor.
B. Turn wheel motor to center a wheel motor piston
below the sensor port.
C. Thread the sensor into the port until it contacts the
piston. Then turn sensor out (counter−clockwise) un-
til angle of orientation grooves on the sensor and the
motor center−line are between 90 and 93 degrees.
D. Then back out sensor one full turn and tighten the
lock nut from 75−125 in−lbs (8.5 to 14 N−m) and re−
test.
9. If frequency measurement does not increase with in-
creasing wheel speed after verifying alignment of sen-
sor and re−installation, remove and replace the speed
sensor. See Traction Speed Sensor in the Service and
Repairs section of this chapter.