Service Manual

ELECTRICAL
7-10
Toro TimeCutter SS/MX/ZS Service Manual
7
Brake Actuator Module Diagnostic
Tips:
Check battery voltage and charging system function.
Under or over voltage can affect how the module
operates.
Check the operation of each safety interlock switch
before condemning the Brake Actuator Module or
wire harness.
Check the inputs to the Brake Actuator Module from
the safety switches, as shown in this chapter.
Check for poor grounds/loose ground connections.
Check harness for pinched/broken wires and poor
connections.
Check the Brake Actuator Module harness
connection for corrosion. If corrosion is found,
replace the harness and Brake Actuator Module.
If the engine shuts off when the handles are pulled
in, remove the brake rods from the Brake Actuator
Module and function test (for testing purposes only):
Test:
A. If the engine still dies when the handles are pulled
IN, the issue is within the electrical system:
- Check for corrosion at the electrical connectors
and pins
- Check the operation of each of the safety interlock
switches and inputs to the brake module
- Check ground quality
- Check for pinched/broken wires
- Inspect and test PTO clutch for shorts and
grounds as shown in this chapter.
B. If the engine now runs normally when handles are
pulled IN, the issue is mechanical:
- Check for binding linkage
- Check for bent brake rods
- Check for debris
- Inspect brake rods pivot point for burs - see
Service Bulletin CNZ #31
- Weak internal motor in the Brake Actuator Module