P1790

DTC P1790 - INTERNAL TRANSMISSION CONTROL MODULE (TCM) RANDOM ACCESS MEMORY (RAM) CHECKSUM ERROR
Conditions for Setting the DTC
- The Transmission Control Module (TCM) detects a difference between the calculated checksum data and the real checksum data.

Action Taken When the DTC Sets
- The TCM illuminates the Malfunction Indicator Lamp (MIL) after two consecutive trips with a failure reported.

Conditions for Clearing the MIL/DTC
- The TCM turns off the MIL after three consecutive trips without a failure reported.
- The Scan-100 scan tool can clear the Diagnostic Trouble Code (DTC) from the TCM history.
- The TCM clears the DTC from the TCM history if it detects that the calculated checksum data is the same as the real checksum data.





DTC P1790 - Internal Transmission Control Module (TCM) Random Access Memory (RAM) Checksum Error