DEUTZ EMR3 FAULT CODE 142 EEPROM error By : R. Sauer EEPROM stands for Electrically Erasable Programmable Read Only Memory. This memory type is semi-permanent meaning that it can store information without the ECU being powered but it can be erased and reprogrammed when a specific signal is received. This memory is used for storage of operating hours and logistic data between shutdowns. When the engine is shutdown, the ECU remains active for approx. 10-20 seconds. During this time, the logistic data is written to EEPROM so it is available the next time the ECU is booted. If this process is interrupted, the logistic data will not be accurate and a fault code 142 will likely occur. The most common causes of this fault are

1. Main battery disconnect (E-stop) prior to completion of the EEPROM processes. 2. Incorrect wiring resulting in a loss of power to the ECU prior to completion of the

EEPROM processes. 3. Recent programming of the ECU.

The 142 fault code cannot be erased using normal means. This error must be reset by erasing the EEPROM. A side effect of this erasure is the loss of engine operating hours stored in the ECU. As a result, the following steps should be taken any time you are addressing this error.

1. Save a copy of the dataset using Overall Programming in Serdia. 2. Save a copy or error memory 1 and 2. 3. Record the current number of engine operating hours. 4. Use Serdia Tasks to reset the EEPROM. 5. Use Overall Programming to install the dataset saved earlier and enter the operating hours.

Using Serdia Tasks to reset the EEPROM Entering the operating hours in Overall Programming

The illustrations above are linked to the guides for each task in FSDS.