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Dodge Cummins User Guide
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Dodge Cummins Fast CAN Mode
– CMD, CME, CMF
Three flash speeds exist for Dodge Cummins controllers;
1. Unlimited Fast CAN delivers the fastest possible flash time and is approx.
50% faster than standard flash routines.
2. Fast CAN is a little faster than standard, but more robust than Unlimited.
3. Standard can be used if you experience flash failures when using Unlimited
Fast Can or Fast CAN, try unchecking that option and retry the flash.
Cummins Fast CAN Mode can be adjusted the following ways:
1. During Pass-Thru flashing by adjusting the options on the [F3: Tune] -> [F7:
Full Flash] tab.
2. For BBF by adjusting the options on;
a. [F6:Devices] -> [F5: Options] tab and programming the device.
b. Via FlashScan and AutoCal hardware by editing the device options.
Cummins 5.9L ECM VIN Issues
The VIN in the .ctz tune file should always match the VIN in the vehicle prior to
flashing the ECM.
As part of the normal re-flash process for the 5.9L CM849B Cummins ECM, a
section of the flash memory is written that contains vehicle specific values,
including VIN and SKIM code. This part of the ECM is flashed every time the ECM
is programmed.
Flashing a tune from a different vehicle will cause a no start condition until the VIN
in the ECM is corrected to match the vehicle. If an attempt is made to start the
vehicle prior to correcting the VIN, other modules on the truck will detect the non-
matching VIN details setting C2206 "Vehicle Configuration Mismatch" DTC in
several modules.
Once set, EFILive is UNABLE to correct this code and MIL,
resulting in a dealer visit.
To change the VIN in the .ctz tune file open the tune file and:
1. Navigate to [F4: Properties] -> [Controller Information] tab.
2. Enter the VIN.
3. Save the file prior to programming the ECM.
Failed Flash Recovery Methods
In the event that an ECM fails during the flashing process, recovery methods exist
to restore the ECM.
Flash Base with without tune file security restrictions.
In most instances, simply retrying the flash process will return the ECM to working
order.
In the instance where tuners apply security restrictions to a tune file, including
locking to the controller serial number, and the flash fails, you must try to recover
the ECM with a file that has no security restrictions in place (e.g. stock tune)
before attempting to reflash a file with security restrictions.
ROM Boot Recovery
In some flash failure instances the ECM may stop responding and cannot be
recovered to normal operation by simply retrying the flash.