4-108 4222983 Second Edition
ELECTRICAL
4
Steering Control Unit Diagnostic Trouble Codes (DTC)
DTC: Steering Fault 2310
Software detected short circuit in controller, cabling to motor or in motor. (See “Steering Fault: 2310, 2340, 4210, 4310,
7310” on page 4-83.)
DTC: Steering Fault 2340
Hardware detected short circuit in controller, cabling to motor or in motor. (See “Steering Fault: 2310, 2340, 4210,
4310, 7310” on page 4-83.)
DTC: Steering Fault 3120
The DC bus charging is not finished within 10 seconds.
Probable Cause Remedy
Moisture in steering motor connector. Make sure steering motor connectors are clean and dry.
Loose steering control unit terminals. Make sure steering control unit terminals are clean and tight.
Shorted wiring harness. Make sure steering motor wiring harness is free of nicks and cuts and not pinched to
machine frame.
Faulty steering motor. Substitute the steering motor with a known good steering motor. If system now works,
re-install old component to verify fault returns.
Faulty steering control unit. Substitute the steering control unit with a known good steering control unit. If system now
works, re-install old component to verify fault returns.
Probable Cause Remedy
Moisture in steering motor connector. Make sure steering motor connectors are clean and dry.
Loose steering control unit terminals. Make sure steering control unit terminals are clean and tight.
Shorted wiring harness. Make sure steering motor wiring harness is free of nicks and cuts and not pinched to
machine frame.
Faulty steering motor. Substitute the steering motor with a known good steering motor. If system now works,
re-install old component to verify fault returns.
Faulty steering control unit. Substitute the steering control unit with a known good steering control unit. If system now
works, re-install old component to verify fault returns.
Probable Cause Remedy
Low battery. Charge battery.
Loose steering control unit terminals. Make sure steering control unit terminals are clean and tight.
Faulty wiring harness. Make sure steering control unit wiring harness is free of nicks and cuts and not pinched to
machine frame.
Faulty PDU. Substitute the PDU with a known PDU. If system now works, re-install old component to
verify fault returns.
Faulty steering control unit. Substitute the steering control unit with a known good steering control unit. If system now
works, re-install old component to verify fault returns.
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