The Cummins ISM code 432 manual is a 5-page diagnostic PDF for the accelerator pedal circuit on the ISM CM570 (1999–2002) engine. It documents the accelerator pedal assembly, which relays the driver-requested accelerator percentage to the electronic control module (ECM), and carries a red stop lamp.
Cummins ISM code 432 document details
| Brand | Cummins |
| Model coverage | ISM CM570 (1999–2002) |
| System / group | Accelerator pedal circuit — DTCs |
| DTC number | 432 |
| PID / SPN | S230 / 558 |
| FMI | 13/13 |
| Warning lamp | RED |
| Pages | 5 |
| File format | |
| Language | English |
Document table of contents
- Circuit description and component location
- Shop talk on IVS calibration
- Full-fuel sweep verification
- Codes 131 and 551 pre-check and pin inspection
Applicable truck models
This procedure applies to the ISM CM570 (1999–2002) engine and the shared CM570 fuel-system platform found in on-highway trucks. The same fault-code logic is carried across related CM570 engine families of that era. For engine identification and factory service references, see the manufacturer at the Cummins official website.
Who needs this Cummins ISM code 432 manual
The document locates the accelerator position sensor on the pedal and stresses confirming that the idle validation switch is properly calibrated using the pedal manufacturer instructions. The procedure has the technician slowly depress the pedal to the full-fuel position and release it three times, then confirms Codes 131 and 551 are inactive before inspecting the OEM harness connector pins at the ECM for corrosion, bent pins, moisture and damaged seals.
This guide suits diesel technicians and workshop owners who face a red-lamp accelerator pedal fault and need the calibration sweep and related-code checks in one place. It reads as fault code 432 troubleshooting steps for the accelerator pedal circuit, so the ECM circuit diagnosis stays ordered and evidence-based rather than a parts-swap guess, and it maps cleanly onto a scan-tool session on the CM570 engine platform.
The full PDF is available in the DiagTechPro manuals library, where a free account is required to download it.
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