ECM Will Not Communicate with Other Systems or Display Modules
- Wiring and/or electrical connectors
- Cat Data Link
- Electronic Control Module (ECM)
- Connect the electronic service tool to the service tool connector. If the ECM does not communicate with the electronic service tool, refer to Troubleshooting, "Electronic Service Tool Will Not Communicate with ECM".
- Troubleshoot the Cat Data Link for possible problems. Refer to Troubleshooting, "Cat Data Link Circuit - Test".
Caterpillar Information System:
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