Cummins ISM code 3488 is the Cummins ISM CM871 diagnostic entry for fault code 3488, anti-lock braking (ABS) controller circuit (SPN 563, FMI 9/9). This page summarises what the code reports, the circuit involved, and the official Cummins troubleshooting document behind it, taken from the fault-code publication for Cummins ISM CM871 engines. It is written for mechanics and workshop owners who want to confirm the code before ordering parts.
What Cummins ISM code 3488 means
Fault code 3488 is logged against anti-lock braking (ABS) controller circuit. The document reports a warning lamp, which tells the driver to have the engine serviced soon. Certain anti-lock braking (ABS) controllers communicate with the electronic control module (ECM) through the SAE J1939 data link. Under certain driving conditions, the anti-lock braking (ABS) controller can send a cruise control inhibit message to ECM and cruise control will temporarily be disabled.
Circuit description and component location
Component location. The ECM is located on the fuel system side of the engine. The SAE J1939 data link wiring and anti-lock braking (ABS) controller location varies by OEM. Refer to the OEM service manual.
The official diagnostic identifiers for this fault let you match the code across scan tools and repair records:
- SPN: 563
- FMI: 9/9
- Lamp: AMBER
The document walks the technician through the numbered troubleshooting steps for this circuit, from connector inspection to resistance and short-to-ground measurements, so the fault can be confirmed before any part is replaced. Each step ends in a yes or no branch that either clears the code or sends you to the next check, which keeps the diagnosis systematic and avoids guesswork on the bench.
How to diagnose Cummins ISM code 3488
Start by reading the live codes with an approved Cummins diagnostic tool and confirming the code is active. Inspect the harness connector pins for bent or corroded terminals, pushed-back pins and moisture, then follow the manufacturer resistance and continuity checks in the order given. Diagnostic procedures for Cummins ISM CM871 engines are published by Cummins; see the Cummins official website for engine documentation and authorised service-network support.
Official references and part numbers
service tool part numbers such as 3824510. Use these identifiers to order the correct Cummins service publication and tooling, and to log the repair accurately for the fleet record. The full PDF is filed in the DiagTechPro manuals library for mechanics and workshop owners to download.
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