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SPN 705 — Auxiliary Input/Output #05

Safe to driveDrivable, but watch it yourself

J1939 code SPN 705. Below — how the fault is worded at the factory by Mercedes-Benz, Meritor (ex-WABCO) and Renault Trucks, and what the second half of the code (FMI) means in the standard.

Mercedes-BenzMeritor (ex-WABCO)Renault Trucks

Mercedes-Benz

FMI 3Digital Output 1/13 Circuit shorted to Ubat
FMI 4Digital Output 1/13 Circuit shorted to GND
FMI 5Digital Output 1/13 Open Circuit (broken wire, terminal floating)

Meritor (ex-WABCO)

FMI 3Failure detection 'ShortUb' at Auxiliary Output (3/2 Valve Governor)
FMI 4Failure detection 'ShortGnd' at Auxiliary Output (3/2 Valve Governor)
FMI 5Failure detection 'Interruption' at Auxiliary Output (3/2 Valve Governor)
FMI 13Failure detection 'OverEquipped' at Auxiliary Output (3/2 Valve Governor)

Renault Trucks

FMI 4Power steering contact, open circuit. Repair: Check the continuity of the link (SL1/4).

What FMI means in J1939

SPN 705 FMI 3705/3 · 705.3voltage above normal or shorted high
SPN 705 FMI 4705/4 · 705.4voltage below normal or shorted to ground
SPN 705 FMI 5705/5 · 705.5current below normal or open circuit
SPN 705 FMI 13705/13 · 705.13calibration out of range

Can I keep driving

Safe to drive. Below — how much time you have and what happens if you keep going.

What happens if you keep driving

Time you have: Drivable, but watch it yourself

This is an electrical fault: an open, a short or a bad contact in the sensor circuit. The value it measures is most likely fine.

You can drive. But until the circuit is repaired this system runs blind and cannot warn you about a real failure.

Nearby: other

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