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