Dodge Cummins User Guide
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flashing of modified tunes, so to flash a modified tune the Digital Signature must
be switched off.
The EFILive ECM flash process manages the removal of the Digital Signature via
OBD-II flashing in the following circumstances:
Controller
Flash Method
CM2450B (CMF)
In vehicle and bench harness flashing.
CM2350B (CME)
In vehicle and bench harness flashing.
CM2200 (CMD)
Bench unlocking only (due to TIPM).
CM2100 (CMC)
Bench unlocking only (due to TIPM).
CM849 (CMB)
Not Applicable - RSA Digital Signature not
implemented.
In vehicle flashing
for CM2100 and CM2200 controllers requires the BootRSA
Patch file process to remove the digital signature. Please refer to the
NOTE: The ECM must be fully operational and not in boot mode as a result of a
failed flash (error $0340) or forced boot mode. Where the ECM is in boot mode,
the unlock process is bypassed and two-step flash process is required to remove
the digital signature.
1. Recover the ECM by flashing a stock tune to restore the ECM to
operational mode.
2. Flash the ECM to remove the digital signature.
Security Gateway Module
In 2018 Dodge implemented an additional anti-tuning security measure via the
security gateway module. Customers will need to bypass this module by installing
a Security Gateway Module bypass cable (SGM bypass cable).
The SGM bypass cable requires users to replace the two CAN wires in the factory
OBD-II port and connect the bypass cable into the large white connector just
above the OBD-II port in any of the available slots. This cable remains
permanently in the truck and does not need to be removed after flashing.
The OBD-II port will retain all normal functionality, and only bypasses the SGM to
allow flashing to the ECM.
Where the SGM module is detected and a bypass cable is not in place, the
following error will be displayed when the flash is aborted.
Aborting Flash: SGM Detected
Please: Wait...
Script exited with code $0333: Security Access Denied ($33).