SPN 1570 FMI 6ABS
ABS Warn Lamp Output - Current Above Normal
Scan Tool — in guided session
DVOM Testing — in guided session
Connector Pinout — in guided session
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Overview
Fault Code
SPN 1570 / FMI 6
Category
ABS
Derate Risk
No
Regen Inhibit
No
Inducement Risk
No
Component Location: The ABS warning lamp is located in the instrument cluster, with wiring routed from the ABS ECU in the chassis electrical system.
Common Symptoms
- ABS warning lamp illuminated continuously
- ABS warning lamp flashing abnormally
- ABS warning lamp stuck on regardless of system status
- Tractor or trailer ABS protection disabled
- Additional active fault codes related to ABS system
Root Causes
- Short to ground in ABS warning lamp circuit Faulty ABS ECU output driver Damaged wiring harness between ABS ECU and warning lamp Corroded or damaged connector pins at warning lamp or ECU Faulty ABS warning lamp bulb or LED assembly drawing excessive current
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Derate Behavior
Power Derate
No
System Interactions
SPN 1570 FMI 6 interacts with the following systems and may trigger cascading faults if not resolved promptly.
Common Diagnostic Mistakes
Replacing the sensor without verifying wiring continuity and supply voltage first.
Clearing codes without identifying and resolving the root cause — the fault will return.
Ignoring related active faults — cascading faults often share a root cause.
Skipping the connector inspection — corrosion and damaged pins are a leading cause of sensor faults.
Condemning the ECM before exhausting all wiring and component tests.
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OEM System Resources
ASE Training Resources
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Related Diagnostic Articles
Deep-dive diagnostic page: SPN 1570 FMI 6 — Full FSM Sequence & Repair Steps — includes wiring notes, sensor specs, and gated repair procedures.
Authority References
Diagnostic procedures on this page are informed by OEM service literature and industry standards.
Cummins QuickServe OnlineOfficial Cummins service manuals, fault code lookup, and TSB database.Detroit Diesel DiagnoCentralDetroit Diesel diagnostic procedures, DDDL documentation, and service literature.PACCAR MX Engine ServicePACCAR MX-11 and MX-13 engine service documentation and DAVIE diagnostic guides.Volvo/Mack Tech ToolVolvo and Mack engine fault code reference and PTT/Tech Tool diagnostic procedures.ASE — Diesel Truck Technician CertificationNational Institute for Automotive Service Excellence — T2 Diesel Engines certification standards.EPA Aftertreatment & Emissions GuidelinesU.S. EPA heavy-duty diesel aftertreatment compliance, DPF/SCR regulations, and NOx standards.
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