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SPN 806 — ASR Valve, Differential 1

Safe to driveDrivable, but watch it yourself

J1939 code SPN 806. Below — how the fault is worded at the factory by Bendix ABS/ESP, Renault Trucks and WABCO ABS/ESC, and what the second half of the code (FMI) means in the standard.

Bendix ABS/ESPRenault TrucksWABCO ABS/ESC

Bendix ABS/ESP

FMI 3TCV DA Solenoid Shorted to Voltage
FMI 4TCV DA Solenoid Shorted to Ground
FMI 5TCV DA Solenoid Open Circuit
FMI 13TCV DA Configuration Error

Renault Trucks

FMI 2ASR valve, rear, does not meet requirements. Repair: Check that the ASR valve is the correct one.
FMI 3ASR valve supply, short circuit. Repair: Check the continuity of the ASR valve wiring (X4/4, X4/7).
FMI 4ASR valve supply, short circuit. Repair: Check the continuity of the ASR valve wiring (X4/4, X4/7).
FMI 5ASR valve supply, open circuit. Repair: Check the continuity of the ASR valve wiring (X4/4, X4/7).

WABCO ABS/ESC

FMI 3ABV Drive Axle. Shorted to UBATT
FMI 5ABV Drive Axle. Open Circuit
FMI 6ABV Drive Axle. Shorted to Ground

What FMI means in J1939

SPN 806 FMI 2806/2 · 806.2data erratic or intermittent
SPN 806 FMI 3806/3 · 806.3voltage above normal or shorted high
SPN 806 FMI 4806/4 · 806.4voltage below normal or shorted to ground
SPN 806 FMI 5806/5 · 806.5current below normal or open circuit
SPN 806 FMI 6806/6 · 806.6current above normal or grounded circuit
SPN 806 FMI 13806/13 · 806.13calibration 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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