VALVE GP-CHECK 5213213 - Caterpillar

ECM Replacement Procedure
The Electronic Control Module (ECM) is the heart of the Electronic Control System used on the 3176C/3196 and 3406E Marine Engines. The ECM contains no moving parts, has a very high reliability rating and replacement can be time consuming. Most problems occur in the connectors, wiring, or sensors. Follow the troubleshooting procedures outlined in this guide. DO NOT replace an ECM on speculation! To ensure the suspect ECM is the cause of the problem, temporarily connect a new or test (known good) ECM, before replacing the old ECM. To temporarily connect a test ECM you must transfer the Personality Model data from the old ECM to the test ECM and program any necessary parameters required for testing. Refer to the following test steps for details. If the test ECM resolves the problem, reconnect the old ECM and verify the problem returns. If the problem returns, replace the ECM.The operating information from the old ECM MUST be transferred to the new ECM with the Electronic Service Tool. The parameters file can be copied with the Electronic Service Tool and the Personality Module can be downloaded. After the new ECM is installed on the engine, the parameters and the personality module recorded from the old ECM must be programmed into the new ECM and the injection timing must be recalibrated. If the parameters cannot be read they must be obtained elsewhere. Some parameters are stamped on the Engine Information Plate, but most parameters must be obtained from the user or dealer that installed the engine.The following procedure is a summary of the basic steps necessary to program a replacement ECM.Step 1: Use a copy of the Read/Change Parameters. Worksheet in this manual to record the Parameters from the ECM being replaced. It is recommended to record any Logged Events also.(a) Use the Communication Adapter Tool and connect ET to access Parameters from the ECM being replaced.(b) Record the Parameters listed on the worksheet.Step 2: Replace the faulty ECM.(a) Turn the keyswitch to the OFF position.(b) Use a 4 mm Allen wrench to disconnect both 40-pin Deutsch connectors.(c) Remove the fuel lines, ECM mounting bolts and disconnect the ECM ground strap.
Use caution when removing fuel lines. The fuel may be under pressure and can penetrate body tissue.
d) DO NOT lose any of the ECM mounting hardware (i.e. rubber grommets, spacers and washers).e) Ensure the old ECM's mounting hardware is free of damage and use it to install the new ECM. Reconnect the fuel lines. Ensure the ECM mounting hardware is installed correctly. Verify the fuel lines are not tugging or pulling on the ECM. The rubber grommets are used to protect the ECM from excessive vibration. When installed correctly, the ECM can drift in the rubber grommets. If the ECM cannot be moved slightly in the grommets, check that the fuel lines are not pulling the ECM against one side of the grommets.(f) Reconnect the 40-Pin Deutsch connectors and the ground strap to the ECM.Step 3: Always use FLASH