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
- TCM will request the illumination of MIL and store DTC when TCM detects failures on two consecutive ignition cycle.

Conditions for Clearing the MIL/Power Lamp/DTC
- The TCM turns off the MIL when no further failures detected for three consecutive ignition cycles.
- The Scan-100 scan tool can clear the DTC from the TCM history.
- The TCM clears the DTC from the TCM history memory after forty consecutive ignition cycles, without fault while 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