- Electronic Control Module (ECM)
- Electrical connectors
- Data link communications
- Keyswitch power
Connect Caterpillar Electronic Technician (ET). If the ECM does not communicate with Cat ET, refer to service Troubleshooting, “Electronic Service Tool Does Not Communicate”.
Note: This application utilizes dual data link communications for communicating with Cat ET. Some functionality will not be available if a single data link is being used for communications with the ECM.
Check for correct installation of the J1/P1 and J2/P2 ECM connectors. Check for correct installation of all other applicable connectors. Refer to service Troubleshooting, “Electrical Connectors – Inspect”.
Verify communications over the Cat Data Link and the CAN data link. Refer to Troubleshooting, “Data Link – Test” if a problem with communications via the data links is suspected.
Ensure that keyswitch power is being provided to all of the modules that are on the application. Refer to Troubleshooting, “Electrical Power Supply – Test” for information that is related to troubleshooting the engine’s keyswitch circuit.