Conditions for Setting the DTC

WARNING: This page is about a different car, the 2006 Suzuki Verona. However, it is still accessible from the selected car via links, so may be relevant.

The EEPROM checksum test is separated in 2 independent parts, the code checksum test and the calibration checksum test. For each area the checksum is calculated and compared with the corresponding checksum valve. If the valves are different, the fault will be set.
System voltage is too high or too low.
Transaxle input voltage is too high or too low.
Immediately after the above condition occurs.