Fault Possible cause Steps Troubleshooting Procedure
The start motor
operates cor-
rectly but the
product does not
start.
Wiring fault. 1 Do a check that the yellow cable to the engine gets
voltage from the battery when the key switch is in ig-
nition position.
Repair the cable
or replace the
wiring.
2 Do a check that the grounding point on the engine is
fully tightened.
Tighten the
ground cable.
The product
stops when the
parking brake is
released.
Defective opera-
tor presence
control (OPC).
1 Measure the resistance between the black cable to
the motor and ground. Without an operator in the
seat, the resistance must be low. The resistance
must be high when there is an operator in the seat.
Do a check of
the OPC and
connector, re-
place if neces-
sary
The product
stops when the
operator lifts
from the seat
with the parking
brake applied.
Lift lever in low-
ered position.
1 Do a check that the microswitch changes the posi-
tion when the lift lever is lifted.
Replace the mi-
croswitch.
Defective park-
ing brake micro-
switch.
2 Do a check of the parking brake microswitch. Replace the mi-
croswitch.
The product
does not stop
when the opera-
tor lifts from the
seat without re-
leasing the park-
ing brake.
Defective park-
ing brake micro-
switch.
1 Do a check of the parking brake microswitch. Replace the mi-
croswitch.
Defective opera-
tor presence
control (OPC).
2 Measure the resistance between the black cable to
the motor and ground. Without an operator in the
seat, the resistance must be low. The resistance
must be high when there is an operator in the seat.
Do a check of
the OPC and
connectors, re-
place if neces-
sary.
50 - Troubleshooting 1676 - 001 - 26.11.2021
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