Kubota WSM L3540-II, Workshop Manual, Page: 586 / 672

ELECTRICAL SYSTEM L3540-II, L4240-II, L5040-II, L5240-II, L5740-II , WSM
9-S53
[6] STARTING SYSTEM
(1) Main Switch
Remove the Main Switch
1. Remove the panel cover.
2. Disconnect the main switch connector (2).
3. Perform the following checking.
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Connector Voltage
1. Measure the voltage across the connector B terminal and
chassis.
2. If the voltage differs from the battery voltage (11 to 14 V), the
wiring harness is faulty.
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Main Switch at ACC Position
1. Turn the main switch ACC position.
2. Measure the resistance across the B terminal and the ACC
terminal.
3. If 0 ohm is not indicated, renew the main switch.
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Main Switch at Key ON Position
1. Turn and hold the main switch at the "ON" position.
2. Measure the resistances across the B terminal and the ACC
terminal, across B terminal and IG1 terminal and B terminal and
IG2 terminal.
3. If 0 ohm is not indicated, renew the main switch.
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Main Switch at START Position
1. Turn and hold the main switch at the "START" position.
2. Measure the resistances across the B terminal and the IG1
terminal, and across the B terminal, and the ST terminal.
3. If 0 ohm is not indicated, renew the main switch.
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(1) Main Switch (2) Main Switch Connector
Voltage
Connector B terminal –
Chassis
Approx. battery voltage
A: Wire Harness Side Connector 6G
Resistance B terminal – ACC terminal 0 Ω
A: Main Switch Side Connector 6G
Resistance
B terminal – ACC terminal 0 Ω
B terminal – IG1 terminal 0 Ω
B terminal – IG2 terminal 0 Ω
A: Main Switch Side Connector 6G
Resistance
B terminal – IG1 terminal 0 Ω
B terminal – ST terminal 0 Ω
A: Main Switch Side Connector 6G
KiSC issued 02, 2015 A