SPN 264979 — ABS fault, trailer brake valve (Iveco)

Safe to driveDrivable, but watch it yourself

SPN 264979 is a manufacturer number outside the standard J1939 table: different makes can put different things under it. Below — how it is worded by Iveco, and what the second half of the code (FMI) means.

Iveco

FMI 3	ABS fault, trailer brake valve (short circuit to battery)
FMI 5	ABS fault, trailer brake valve (open circuit)
FMI 6	ABS fault, trailer brake valve (short circuit to ground)

What FMI means in J1939

SPN 264979 FMI 3264979/3 · 264979.3	voltage above normal or shorted high
SPN 264979 FMI 5264979/5 · 264979.5	current below normal or open circuit
SPN 264979 FMI 6264979/6 · 264979.6	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

• SPN 264973Retarder brake valve
• SPN 264974ABS fault (low voltage / open circuit)
• SPN 264975ABS fault (low voltage / open circuit)
• SPN 264976ABS fault (low voltage / open circuit)
• SPN 264978ABS fault, differential brake valve
• SPN 264982ABS fault
• SPN 264983ABS fault (warning lamp circuit)
• SPN 265191ABS fault, SAE J1939
• SPN 265211ABS fault (overvoltage)
• SPN 265213ABS fault (EEPROM wheel parameter incorrect)

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