ADAPTER 2S4237 - Caterpillar

Probable Causes
Wiring and/or electrical connectors
Cat Data Link
CAN data link (if equipped)
Electronic Control Module (ECM)Recommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in the order of the listed test steps.
Table 1
Troubleshooting Test Steps Values Results
1. Check for correct installation of the connectors for the ECM J1/P1, J2/P2, and J3/P3.
Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect"
ECM
Result: Connectors are installed incorrectly.
Repair: Correct the installation issue. Return to service.
Result: Connectors are installed correctly. Proceed to Test Step 2
2. Connect Cat ® Electronic Technician (Cat ET) to the service tool connector.
Cat ET
Result: Cat ET will not communicate with the ECM.
Proceed to troubleshooting without a diagnostic code Troubleshooting, "Electronic Service Tool Will Not Communicate with ECM."
Result: Cat ET communicates with the ECM. Proceed to Test Step 3.
3. Troubleshoot the Cat Data Link for possible problems.
Cat Data Link
Result: Cat Data Link does not connect. Refer to the diagnostic functional test Troubleshooting, "Cat Data Link Circuit - Test".
Result: Cat Data Link connects. Proceed to Test Step 4.
4. Troubleshoot the CAN Data Link (if equipped) for possible problems.
CAN Data Link
Result: CAN Data Link does not connect. Refer to the diagnostic functional test Troubleshooting, "CAN Data Link Circuit - Test".
Result: CAN Data Link connects. Return to service.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).