Cummins ISX, ISM CM871, CM876 Electronic Troubleshooting Manual


Covers: Cummins ISX, ISM Engine CM871 and CM876 Electronic Control Systems
Format: Software download
File size: 185mb
Works with: Windows XP/Vista/7/8/10 only

This software contains troubleshooting and repair steps for CM871 and CM876  control systems used in Cummins ISX and ISM engines. Windows operating systems only. No installation required.

Please note that this software does not have any print or search functions.

Topics in the Cummins ISX, ISM CM871, CM876 Electronic Troubleshooting and Repair Manual:


Engine and System Identification

  • Engine Identification
  • Engine Views


Troubleshooting Fault Codes

Troubleshooting Symptoms

  • Troubleshooting Procedures and Techniques
  • Troubleshooting Symptoms Charts
  • Communication Error – Electronic Service Tool or Control Device
  • Engine Brake Does Not Operate
  • Engine Fan Does Not Operate, Operates Erratically, or Operates Continuously
  • Engine Will Not Shut Off
  • Fault Code Warning Lamps Do Not Illuminate
  • Low Idle Adjust Switch Does Not Work
  • PTO or Cruise Control Does Not Operate
  • ECM – No Communication Troubleshooting Tree
  • Engine Performance Troubleshooting Tree – ISX with CM871
  • Engine Performance Troubleshooting Tree – ISM with CM876

Electronic Engine Controls and Sensors



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