31302-4110 Tohatsu CARBURETOR COVER (W/MARK)

A4:E4 Engine ECM and A5:E2 Aftertreatment ECM Replacement
If the flash file and engine application are not matched, engine damage may result.
Perform the following procedure in order to replace the A4:E4 Engine ECM and A5:E2 Aftertreatment ECM.
Record the configuration data.
Try to establish communication between the Caterpillar Electronic Technician (ET) and the ECM. Proceed to Test Step 2 if Cat ET does not communicate with the ECM.
Print the parameters from the "Configuration" screen on Cat ET. If a printer is unavailable, record all of the parameters.
Obtain the customer passwords from the vehicle owner. Access the customer specified parameters with Cat ET. Record the value of each customer parameter.
Record ECM lifetime totals.________
Record any logged diagnostic codes. ________Note: If the customer passwords are not available proceed to Troubleshooting, "Customer Passwords" for details that are related to customer passwords.
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, the parameters must be obtained elsewhere. Some of the system configuration parameters are stamped on the engine information plate. The aftertreatment identification information is stamped on the CEM identification plate. Most of the parameters must be obtained from the factory. Parameters that are related to customer specified parameters must be obtained from the customer or from the Original Equipment Manufacturer (OEM).
Removal of the ECM:
Turn the keyswitch OFF.
Disconnect both ECM connectors.
Disconnect the ECM ground strap.
Remove the mounting hardware at each corner of the ECM.
Installation of the replacement ECM:
Use the old mounting hardware to install the replacement ECM.
Connect the ECM ground strap.
Connect both ECM connectors. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
Configure the replacement ECM:
Flash program the latest available flash file into the ECM. Refer to Troubleshooting, "ECM Software - Install" for the correct procedure.
Use Cat ET to match the engine application and the interlock code if the replacement ECM was used for a different application.Note: Two sets of factory passwords are required in order to program the Aftertreatment parameters.
If the "Copy Configuration" process from Step 1.d 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.
If the "Copy Configuration" process from Step 1.d was unsuccessful, manually program the ECM parameters. The parameters must match the parameters from Step 1.d.
Program the engine monitoring system, if necessary.
Calibrate the engine speed/timing if there is a diagnostic code for speed/timing sensor calibration. The procedure is in Troubleshooting, "Timing - Calibrate".Note: If an engine is a Series C7.1 or Series C9.3, use Cat ET to perform the "fuel system functional test". This test established a baseline value of the fuel system rate of fuel return at high rail pressure. Other diagnostic codes may be activated if this test is not performed.
If an E1305 (1) or a 3483-11 code becomes active after the ECM replacement, Refer to Troubleshooting, "ARD is Disabled" for instructions on clearing the code.Diesel Exhaust Fluid Control Unit (DCU) Replacement
Replacement of the DCU does not require the configuration data to be recorded. When the DCU is replaced, the flash file is already installed in the new DCU.
Removal of the DCU:
Turn the keyswitch to the OFF position.
Disconnect the 86 and 53 pin connectors.
Remove the mounting hardware.
Installation of the replacement DCU:
Install the previously removed mounting hardware to the replacement DCU.
Connect the 86 and 53 pin connectors.Additional Procedures when Replacing the Engine, Engine ECM, Aftertreatment ECM, DCU, or CEM
Engine Replacement or ECM Replacement without DPF Replacement
If the engine or aftertreatment ECM are replaced, then determine the most recent cleaning of the DPF.
If the diesel particulate filter was cleaned within the last 500 hours of operation, an ash cleaning procedure is not required. Reset the engine ash model, Refer to Troubleshooting, "Cat ET Service Features, DPF Ash Service" for additional information.
If the diesel particulate filter was not cleaned within the last 500 hours of operation, clean the DPF. Refer to Special Instruction, REHS8180, "Aftertreatment Filter Maintenance on Tier 4 Final Products Equipped with a Diesel Particulate Filter (DPF), Diesel Oxidation Catalyst (DOC) and a Selective Catalyst Reduction (SCR) Filter" for additional information. Refer to Systems Operation and Testing and Adjusting, "Diesel Particulate Filter - Clean" for the correct procedure.DPF Replacement without an Engine Replacement
If the DPF has failed, replace the DPF and reset the engine ash model, Refer to Troubleshooting, "Cat ET Service Features, DPF Ash Service"for additional information.CEM Replacement without an Engine Replacement
If the CEM was replaced, reset the engine ash model and perform the DOC replacement procedure. Refer to Special Instruction, REHS8180, "Aftertreatment Filter Maintenance on Tier 4 Final Products Equipped with a Diesel Particulate Filter (DPF), Diesel Oxidation Catalyst (DOC) and a Selective Catalyst Reduction (SCR) Filter" for additional information.
Illustration 1 g03338130
Update the CEM serial number with Cat ET.
Click on "Configuration".
Select "Engine #1 Aftertreatment Controller".
Select "Factory Installed Aftertreatment #1 Indentification Number".
Click the "Change" tab at the bottom of the screen.
Type in the new CEM serial number and click "OK".
Perform an "Aftertreatment System Functional Test" in Cat ET to verify the correct operation of the new CEM.
Report both the old CEM serial number and the new CEM serial number in the SIMSi service report.