BUSHING 7P7235 - Caterpillar

"Test ECM Mode" can be used to determine if the Engine Control Module (ECM) is the cause of a problem. This feature allows a standard ECM to be used as a test ECM. This feature eliminates the need to stock a test ECM.
Obtain the latest available flash file for the engine. Note: If a newer software version is available for the engine, install the newest software on the suspect ECM. If the new software does not fix the problem continue with this procedure.
Use the "Copy Configuration" feature on the Caterpillar Electronic Technician (ET) to copy the parameters from the suspect ECM. Note: If the "ECM Replacement" feature cannot be used, record the value of each customer specified parameter. Also record the system configuration parameters.
Disconnect the suspect ECM. Temporarily connect the test ECM to the engine. Do not mount the test ECM on the engine.
Flash program the test ECM with the latest available flash file.
Start the "Test ECM Mode" on Cat ET. Access the feature through the "Service" menu. Cat ET will display the status of the test ECM and the hours that are remaining for the "Test ECM Mode". Note: "Test ECM Mode" can only be activated if the engine serial number has not already been programmed during normal operation of the ECM. If the engine serial number is programmed and the ECM is not in "Test ECM Mode", the ECM can never be used as a test ECM.
Use the "Copy Configuration" feature on Cat ET to program the test ECM. Note: If the "ECM Replacement" feature can not be used, program the test ECM with the values for the customer specified parameters and the values for the System Configuration Parameters.
Program the engine serial number into the test ECM. Note: The "Test ECM Mode" must be activated before the engine serial number is programmed into the ECM.
Verify that the test ECM fixes the problem. When the "Test ECM Mode" is activated, an internal timer sets a 24 hour clock. This clock counts down only while the ECM is powered and the keyswitch is in the ON position. After the ECM has counted down the 24 hour period, the ECM exits the "Test ECM Mode". The parameters, the accumulated mileage, and the engine serial number are set.If the test ECM fixes the problem, the vehicle can be released while the "Test ECM Mode" is still active.Once an ECM has been activated in the "Test ECM Mode", the ECM stays in the "Test ECM Mode" until the timer times out. If the ECM is used as a test ECM for more than one engine, the "Test ECM Mode" must be reactivated. Anytime prior to the "Test ECM Mode" timing out, the ECM can be reset to 24 hours by starting the "Test ECM Mode" on Cat ET.