SPN 520522 — factory code Meritor (ex-WABCO) and SITRAK

Safe to driveDrivable, but watch it yourself

SPN 520522 is a manufacturer number outside the standard J1939 table: different makes can put different things under it. Below — how it is worded by Meritor (ex-WABCO) and SITRAK, and what the second half of the code (FMI) means.

Meritor (ex-WABCO)

FMI 3	Failure detection 'ShortUb' at AbsGround (Intermediate Axle)
FMI 4	Failure detection 'ShortGnd' at AbsGround (Intermediate Axle)

SITRAK

FMI 2

Tampering detected: driver inducement, level 1. Scan tool code: P1077. Effect: Torque may be limited.

What FMI means in J1939

SPN 520522 FMI 2520522/2 · 520522.2	data erratic or intermittent
SPN 520522 FMI 3520522/3 · 520522.3	voltage above normal or shorted high
SPN 520522 FMI 4520522/4 · 520522.4	voltage below normal or shorted to ground

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 520515
• SPN 520516
• SPN 520517
• SPN 520520
• SPN 520521
• SPN 520523
• SPN 520524
• SPN 520525
• SPN 520526
• SPN 520527

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