This Cummins starter relay fault document is a troubleshooting guide for Fault Code 584 on CM2150 engines. It explains a starter lockout relay driver circuit condition where voltage is above normal or shorted to a high source, with diagnostic checks using INSITE™ electronic service tool and multimeter resistance measurements. The file is Code 584.pdf, 13 pages, in English.
Official Cummins starter relay fault document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB, ISC, and ISL with CM2150; ISB6.7 CM2150 (2007-09) |
| System/Group | Starter Relay Circuit; DTCs |
| Publication no. | Fault Code 584 |
| Year/Revision | Last Modified: 20-Jul-2010 |
| Pages | 13 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- Conditions for Setting the Fault Codes
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check the fault codes.
- Guided Step 2 – Check the starter lockout relay circuit.
- Guided Step 3 – Check the ECM and OEM harness.
- Guided Step 4 – Clear the fault codes.
Applicable truck models
This document applies to Cummins ISB, ISC, and ISL engines with CM2150 control, including ISB6.7 CM2150 (2007-09) coverage shown in the file information. The procedure is OEM-dependent for starter lockout relay location and return-circuit routing, so the OEM wiring diagram is required for connector pin identification and ground details. For manufacturer information, visit Cummins official website.
Who needs this Cummins starter relay fault manual
Workshop owners, diesel mechanics, and electrical diagnostic technicians need this Cummins starter relay fault manual when Fault Code 584 is active or inactive and the engine may not start or may lose starter lockout protection. It supports inspection of the starter lockout relay, OEM harness, ECM connector pins, relay resistance, open circuits, and pin-to-pin shorts.
The guide identifies the code data as PID S39, SPN 677, and FMI 3/3, with an amber CHECK ENGINE lamp. It states that the ECM controls the starter lockout relay through a PWM signal circuit and disables the Starter Lockout feature when the fault is active. The troubleshooting path checks whether Fault Code 584 is inactive, inspects connector damage, measures relay resistance, verifies return circuit resistance below 10 ohms, checks the SIGNAL wire for less than 10 ohms, and checks for shorts greater than 100k ohms. Repair actions include cleaning connectors, repairing damaged pins, replacing the starter lockout relay, repairing or replacing the OEM harness, and following Cummins procedures such as 019-071, 019-360, 019-361, 019-362, 019-043, and 019-031 where referenced.
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