Cummins ISX ECM Repair Rebuild Service
- Repair Cost : Contact Us
- Warranty : Life Time Limited Warranty
- Shipping : We pay return shipping cost in Canada
Reference Number
Most Common Isues
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Reference Number
Cummins ISX & ISM Engine Applications
Cummins ISM Series
- 2003 – 2006 → ISM CM875
- 2007 – 2009 → ISM CM876
Cummins ISX Series
- 1999 – 2002 → ISX CM570
- 2003 – 2006 → ISX CM870
- 2006 – 2015 → ISX CM871
Most Common Isues
1. ECM Power and Communication Issues
- No Start / No Communication – A faulty ECM can prevent the engine from starting or communicating with diagnostic tools.
- Blown Fuses / Voltage Spikes – Electrical surges or unstable voltage can damage ECM circuits.
- Bad Grounding – Corrosion or loose grounds can cause intermittent ECM failures.
2. Injector and Fuel System Problems
- Injector Driver Circuit Failure – Internal ECM faults can cause misfires or injector malfunctions.
- Fuel Pressure Sensor Errors – Incorrect readings can lead to poor performance or excessive fuel consumption.
- Bad Timing or Injection Control – ECM-controlled timing failures can cause rough idling or power loss.
3. Turbocharger & Air Management Issues
- VGT (Variable Geometry Turbo) Actuator Failures – The ECM may fail to control the turbo properly, causing boost issues.
- EGR (Exhaust Gas Recirculation) Faults – Common on ISX CM870, CM871, and CM876 models, leading to excessive soot buildup and poor fuel efficiency.
- Mass Airflow Sensor & MAP Sensor Failures – Incorrect air/fuel ratio readings cause power loss and excessive emissions.
4. DPF & Emission Control Failures (ISX CM871 & CM876)
- DPF Regeneration Problems – The ECM may fail to trigger regen cycles properly, leading to clogged filters.
- DEF System Faults – Issues with the DEF dosing system can cause power derates and check engine lights.
- NOx & O2 Sensor Failures – Incorrect sensor readings can trigger fault codes and reduce performance.
5. Overheating & Cooling System Issues
- Faulty Engine Coolant Temperature Sensor – Causes incorrect temperature readings and potential overheating.
- Fan Clutch Control Failures – The ECM may not properly engage the cooling fan, leading to temperature spikes.
6. ECM Internal Failures
- Corrupted Software / Flashing Issues – Failed ECM reprogramming can brick the module.
- Shorted Internal Components – Water intrusion, vibration, or age-related degradation can cause circuit failures.
- EEPROM / Memory Corruption – Leads to incorrect parameter settings, poor engine operation, or random shutdowns.
7. CAN Bus & Sensor Communication Errors
- J1939 Communication Issues – The ECM may fail to communicate with other modules due to wiring or internal faults.
- Speed Sensor Malfunctions – A faulty speed sensor can cause derates and shifting issues in automated transmissions.
- Throttle Position Sensor (TPS) Failures – Leads to unresponsive acceleration or unexpected power loss.
Contact Us
Contact Us
📍 Unitech Electronics Inc
📌 Address: 3601 Hwy 7 East, Suite 1005, Markham, L3R 0M3, Canada
📞 Toll-Free: +1 (888) 405-7730
📧 Email: contact@unitechelectronics.ca
🕘 Business Hours:
- Monday – Friday: 9:00 AM – 6:00 PM (EST)
- Saturday – Sunday: Closed
📌 Get in Touch!
For inquiries, ECM repairs, or support, feel free to reach out via phone or email. Our expert team is here to assist you with all your Cummins ISM & ISX ECM needs.