EEPROM and configuration | ||
DTC | P0601 | Internal control module memory check sum error |
P0602 | Control module programming error | |
P0603 | Internal control module keep alive memory error | |
An ECM ROM(A) malfunction is detected by using a checksum technique for verifying data. Digital data is composed of zeros and ones. A checksum is the total of all ones in a string of data. By comparing the checksum value with a stored value, a malfunction can be detected.
DTC No | Detecting Condition & Limp Home | Suspected area |
P0601 P0602 P0603 | Detecting Condition P0601 : Checksum - checksum not correct P0602 : Data writing error P0603 : EEPROM does not answer, code word incorrect or missing Enable Condition Ignition switch : ON Limp Home None | - ECM |
● Internal fault. There is no inspection of service possible for this diagnostic trouble code. ● Temporarily install a good ECM and check for proper operation. If problem is corrected, replace ECM. |
