What does SPN 520194 FMI 2 (520194/2) mean?

SPN 520194: data erratic or intermittent.

What does SPN 520194 FMI 3 (520194/3) mean?

SPN 520194: voltage above normal or shorted high.

SPN 520194 — factory code KAMAZ, MAZ, Volvo and others

Q: Can I keep driving with code SPN 520194?

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

Safe to driveDrivable, but watch it yourself

SPN 520194 is a manufacturer number outside the standard J1939 table: different makes can put different things under it. Below — how it is worded by KAMAZ, MAZ, Volvo and YaMZ, and what the second half of the code (FMI) means.

KAMAZ MAZ Volvo YaMZ

KAMAZ

FMI 2	Adjustable speed limiter lamp
FMI 3	Adjustable speed limiter lamp
FMI 4	Adjustable speed limiter lamp
FMI 5	Adjustable speed limiter lamp

MAZ

FMI 2	Speed limiter lamp circuit fault - Overheating. Blink code: 3-3-5. Repair: Check the lamp and its wiring.
FMI 3	Speed limiter lamp circuit fault - Short to battery positive. Blink code: 3-3-5. Repair: Check the lamp and its wiring.
FMI 4	Speed limiter lamp circuit fault - Short to ground. Blink code: 3-3-5. Repair: Check the lamp and its wiring.
FMI 5	Speed limiter lamp circuit fault - Open circuit. Blink code: 3-3-5. Repair: Check the lamp and its wiring.

Volvo

FMI 5	LCM output current to the lamp is below 0.1 A. Open supply wire between the LCM and the lamp, open wire between the lamp and the ground point, or lamp failure.
FMI 6	LCM output current to the lamp is above 3.1 A. Wire shorted to ground between the LCM and the lamp. Possibly several lamps are connected, or a higher-wattage lamp is installed.

YaMZ

FMI 2	Speed limiter lamp circuit fault (Overheating). Blink code: 3-3-5. Repair: Check the lamp and its wiring.
FMI 3	Speed limiter lamp circuit fault (Short to battery positive). Blink code: 3-3-5. Repair: Check the lamp and its wiring.
FMI 4	Speed limiter lamp circuit fault (Short to ground). Blink code: 3-3-5. Repair: Check the lamp and its wiring.
FMI 5	Speed limiter lamp circuit fault (Open circuit). Blink code: 3-3-5. Repair: Check the lamp and its wiring.

What FMI means in J1939

SPN 520194 FMI 2520194/2 · 520194.2	data erratic or intermittent
SPN 520194 FMI 3520194/3 · 520194.3	voltage above normal or shorted high
SPN 520194 FMI 4520194/4 · 520194.4	voltage below normal or shorted to ground
SPN 520194 FMI 5520194/5 · 520194.5	current below normal or open circuit
SPN 520194 FMI 6520194/6 · 520194.6	current above normal or grounded circuit

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

Scanner threw several codes at once? Paste the whole list — we will show which one is the root cause and which ones simply followed.