8 RENR5042-02 Troubleshooting Section 4. Place the keyswitch in the ON position. If Cat ET and the communication adapter do not communicate with the Electronic Control Module (ECM), refer to the diagnostic procedure Troubleshooting, “Electronic Service Tool Will Not Communicate With ECM”. Note: Ensure that the ECM is receiving power and that the ECM is properly wired to the negative battery circuit before a replacement of the ECM is attempted. Refer to Troubleshooting, “Electrical Power Supply Circuit - Test”. A test ECM can be used to determine if the ECM is faulty. Install a test ECM in place of the suspect ECM. Flash program the correct flash file into the test ECM.
Program the parameters for normal operation of the engine. The parameters must match the parameters in the suspect ECM. Refer to the following test steps for details. If the test ECM resolves the problem, connect the suspect ECM. Verify that the problem returns. If the problem returns, replace the suspect ECM. i02139021 Electronic Display Module (If Equipped) SMCS Code: 7490 An electronic display module may be used to display CID-FMI information from the electronic control system. Refer to the service manual for your electronic display module for more information. Note: When a new ECM is not available, you may need to remove an ECM from an engine that is not in service.
The interlock code for the replacement ECM must match the interlock code for the suspect ECM. Be sure to record the parameters from the replacement ECM on the “Parameters Worksheet”. Use the “Copy Configuration/ECM Replacement” feature that is found under the “Service” menu on the Caterpillar Electronic Technician (ET). i02290070 Replacing the ECM SMCS Code: 1901-510 NOTICE Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, test- ing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before open- ing any compartment or disassembling any compo- nent containing fluids.
NOTICE If the flash file and engine application are not matched, engine damage may result. Perform the following procedure in order to replace the ECM: Refer to Special Publication, NENG2500, “Caterpillar Tools and Shop Products Guide” for tools and supplies suitable to collect and contain fluids on Caterpillar products. 1. Record the configuration data: a. Connect Cat ET to the service tool connector. Refer to Troubleshooting, “Electronic Service Tools”. Dispose of all fluids according to local regulations and mandates. b. Print the parameters from the “Configuration” screen on Cat ET. If a printer is unavailable, record all of the parameters.
Record any logged diagnostic codes and logged event codes for your records. Record the injector codes from the “Calibrations” screen in the “Service” menu on Cat ET. NOTICE Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life. The Electronic Control Module (ECM) contains no moving parts. Replacement of the ECM can be costly. Replacement can also be a time consuming task. Follow the troubleshooting procedures in this manual in order to ensure that replacing the ECM will correct the problem. Verify that the suspect ECM is the cause of the problem. c.
Use the “Copy Configuration/ECM Replacement” feature that is found under the “Service” menu on Cat ET. Select “Load from ECM” in order to copy the configuration data from the suspect ECM. Note: If the “Copy Configuration” process fails and the parameters were not obtained in Step 1.b, the parameters must be obtained elsewhere. Some of the parameters are stamped on the engine information plate. Most of the parameters must be obtained from the factory.