RENR5042-02 9 Troubleshooting Section 2. Remove the ECM: c. If the “Copy Configuration” process from Step 1.b was successful, return to the “Copy Configuration/ECM Replacement” screen on Cat ET and select “Program ECM”. Proceed to Step 4.e when programming is complete. a. Turn the keyswitch to the OFF position. b. Disconnect the P1 and P2 connectors from the ECM. d. If the “Copy Configuration” process from Step 1.b was unsuccessful, manually program the ECM parameters. The parameters must match the parameters from Step 1.b. NOTICE Use a suitable container to catch any fuel that might spill. Clean up any spilled fuel immediately. e. Program the engine monitoring system, if necessary.
NOTICE Do not allow dirt to enter the fuel system. Thoroughly clean the area around a fuel system component that will be disconnected. Fit a suitable cover over discon- nected fuel system component. f. Load the injector trim files for the injectors. Refer to Troubleshooting, “Injector Trim File”. g. Calibrate the engine speed/timing. Refer to Troubleshooting, “Engine Speed/Timing Sensor - Calibrate”. c. Remove the fuel lines (if equipped) from the ECM. d. Disconnect the ECM ground strap. i02101273 Self-Diagnostics e. Remove the mounting bolts from the ECM. 3. Install the replacement ECM: SMCS Code: 1901 a. Use the old mounting hardware to install the replacement ECM.
The Electronic Control Module (ECM) has the ability to detect problems with the electronic system and with engine operation. When a problem is detected, a code is generated. An alarm may also be generated. There are two types of codes: b. Connect the fuel lines (if equipped). Note: Verify that the fuel lines are installed correctly. The fuel lines must not put tension on the ECM. Rubber grommets are used to protect the ECM from excessive vibration. The ECM should move slightly in the rubber grommets. If the ECM cannot be moved slightly, check that the fuel lines are not pulling the ECM against one side of the grommets.
Diagnostic Event Diagnostic Code When a problem with the electronic system is detected, the ECM generates a diagnostic code. This indicates the specific problem with the circuitry. c. Connect the ECM ground strap. d. Connect the P1 and P2 connectors. Tighten the ECM connector (allen head screw) to the proper torque. Refer to Troubleshooting, “Electrical Connectors - Inspect” for the correct torque value. Diagnostic codes can have two different states: Active Logged 4. Configure the replacement ECM: Active Code An active diagnostic code indicates that an active problem has been detected. Active codes require immediate attention. Always service active codes prior to servicing logged codes. a.
Flash program the flash file into the ECM. Refer to Troubleshooting, “Flash Programming” for the correct procedure. Logged Code Every generated code is stored in the permanent memory of the ECM. The codes are logged. b. Use Cat ET to match the engine application and the interlock code if the replacement ECM was used for a different application. Event Code An event code is generated by the detection of an abnormal engine operating condition. For example, an event code will be generated if the oil pressure is too low. In this case, the event code indicates the symptom of a problem.