Fault 123: Motor Over Speed-M/G - Toro Reelmaster 5010-H Diagnostic Manual

Fault 123: Motor Over Speed—M/G
InfoCenter Display:
Fault Description
The measured speed of the motor/generator has exceeded 3,600 rpm.
Circuit Description
Motor/generator rpm is limited by the electronic control of the fuel actuator and the engine mechanical governor.
This fault is reported when both of those rpm limiting systems have failed, and the motor/generator is allowed to
rotate at more than 3,600 rpm.
Conditions for Setting the Fault
This fault can only occur when the motor/generator stops communicating with the TEC-5002 and the mechanical
engine speed governor (fuel actuator) are bad at the same time.
Recommended Service Actions
Step 1: Verify that the fault repeats.
1. Clear the system faults from the InfoCenter. Refer to
2. Operate the machine.
Pass
The fault did not repeat. Go to
Note:
If the fault does not repeat, an isolated event has occurred.
Fail The fault repeated. Go to Step 2.
Step 2: Test the CAN bus wiring in main harness connector P37.
Use a multimeter to test the resistance between the following pairs of locations:
Location Harness
1 Main
2 Main
_____FAULT
HI
Returning the Machine to Service (page 22)
Connector Pin
P37 5
P37 6
#123_____
Speed
Clearing Faults from the InfoCenter (page
Wire Expected
Color Reading
Yellow
54 to 66
ohms
Green
430
21).
and follow the steps listed.
Connector Graphic