Factory Passwords on Caterpillar ET Software

Programming Parameter

Cat ET can be used to view certain parameters that can affect the operation of the engine. The Cat ET can also be used to change certain parameters. The parameters are stored in the ECM. Some of the parameters are protected from unauthorized changes by passwords. Parameters that can be changed have a tattletale number. The tattletale number shows if a parameter has been changed.

Always document the parameters and the settings that are programmed into the engine control. A permanent record is essential when customer programmable parameters must be recovered.
Figure 1.1 - Factory Passwords (3512B)
Passwords are part of a security system that helps to prevent unauthorized reprogramming of certain parameters. Passwords prevent unauthorized erasing of logged events. Passwords allow the factory to control access to engine calibration parameters. Passwords allow the customer to control access to certain programmable engine parameters.

Customer Passwords
Customer Passwords allow the customer to restrict access to parameters that are programmable by the customer. The Customer Passwords cannot be longer than eight characters. The customer has the option of entering one or two Customer Passwords.
Figure 1.2 - Customer (Security) C-15
NOTE: If the owner loses the owner Customer Passwords, the owner will not be able to program parameters that are protected by Customer Passwords. Customer Passwords can be read if a factory password is obtained. Use those customer passwords to program parameters that have been protected by the Customer Passwords. But usually, you can directly edit the parameter as range value (Security: Customer).

Reset/View Customer Passwords
The "Reset/View Passwords" function provides two randomly generated customer passwords. This function allows a service technician access to customer password-protected parameters without divulging the actual customer passwords, which may be the same for an entire fleet. The original passwords may be restored through the "Restore Passwords" function when the temporary random passwords are no longer needed.
Figure 1.3 - Information (Passwords)
Figure 1.4 - No Customer Passwords (Programmed)

Factory Passwords
Factory Passwords are required to clear any event code. Factory Passwords are required to change certain parameters such as full load setting (FLS). The Factory Passwords restrict changes to authorized personnel. When the correct Factory Passwords have been entered, the changes can then be made. In order to obtain the proper Factory Passwords, certain information must be given to an authorized Caterpillar dealer. Since the Factory Passwords contain alphabetic characters, Cat ET can be used to perform this function. In order to obtain the Factory Passwords, proceed as if you already have the Factory Passwords. If the Factory Passwords are needed, Cat ET will request the Factory Passwords. Cat ET will display the information that is required to obtain the Factory Passwords (as Figure 1.1 above).
Figure 1.5 - Factory (Security) 3512B
NOTE: The old interlock code is required to change the interlock code on a used ECM. A new interlock code is also required to change the interlock code on a used ECM.

The Cat ET screen for Factory Passwords will display the following parameters (as Figure 1.10 below):
  • Serial Number of the ECM
  • Engine Serial Number
  • Serial Number for Cat ET
  • Reason Code
  • Total Tattletale Number
NOTE: The Factory Passwords may only be used for one programming session. A different set of factory passwords will be required after you exit the Cat ET screen. A different set of passwords will be required to change information on another Cat ET screen.
Figure 1.6 - Change the Monitoring Data/ Factory (Security) 1
Figure 1.7 - Factory Passwords #1/ #2
Figure 1.8 - Change the Monitoring Data - Factory (Security) 2

Click on "Save to File" button, to Save the "html" file for Factory Passwords.
Figure 1.9 - Save to File (Factory Passwords)
Figure 1.10 - "html" file (Factory Passwords)

NOTE: Changing the parameters that are protected by Factory Passwords may cause your Caterpillar warranty to be voided.

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15 Responses to "Factory Passwords on Caterpillar ET Software"

  1. The following information will be passed into the Factory Passwords System:
    Service Tool Serial Number: ET524288-6-TZ
    Engine Serial Number: 6NZ84594-PV
    ECM Serial Number: 17926694IK-TY
    Total Tattletale: 54
    Reason: 2
    Diagnostic Clock: 46605 hours
    If the above information is correct, please click on the link below.
    Created: Wednesday, 12:06 PM, 8/19/2020

    1. Hello there, please click on "Save to File" button when FP displayed, then send your html file to my email, or Contact Us.

  2. The following information will be passed into the Factory Passwords System:
    Service Tool Serial Number: ET000911-8-TF
    Engine Serial Number: S2L00867-N7
    ECM Serial Number: 35486146JP-V3
    Total Tattletale: 6
    Reason: 4
    Diagnostic Clock: 25393 hours
    Software Part Number:

    Please help me with the factory password

  3. Hi can you please provide c9.3 engine ECM
    A4E4V3.1 wash flash to blank

  4. Hello can you help with factory password for this file

    The following information will be passed into the Factory Passwords System:
    •Display Code: 231
    •Feature Code: 1%D%3%B E8
    •Product ID:
    •Component Serial Number: D8T27016 RK
    •Service Tool Serial Number: ET000911-9 TH
    •ECM Serial Number: 11277391VN TX
    •Additional Data 1: %%E75 AQ
    •Additional Data 2:
    •Reason: 3
    •Software Part Number: 5949976-00 RM

    If the above information is correct, please click on the link below.

    Created: Wednesday, 12:58 PM, 2/16/2022

  5. Hi can you help for 18 digit factory password

  6. Hi can you please share caterpillar ecm flash files collection

  7. Hi can you please gerarate factory password

  8. Hi can you help me issue factory password for below.

    Current ECM: C9 330D (JSC20000)
    Service Tool Serial Number: ET061440-6-TF
    Engine Serial Number: JSC20000-NQ
    (ECM Serial Number: 00316136JM-TD
    Total Tattletale: 67
    Reason: 1
    FLS: 16
    FIS: -26
    Diagnostic Clock: 14889 hours
    Test Spec: OK6787 0K6788
    Test Spec with BrakeSaver: