3176B, C-10, C-12 & 3406E TRUCK ENGINES Caterpillar

Factory Passwords

Factory passwords are required to perform each of the following six functions.

1. Program a New ECM

- When an ECM is replaced, the System Configuration Parameters must be programmed into the new ECM. For a new ECM these parameters can be programmed once without Factory Passwords, thereafter these parameters are protected by factory passwords.

2. Rerate Engine to Another Engine Family

- This requires changing the Personality Module Code, which is protected by factory passwords. Includes changing from a non-multi-torque to a multi-torque personality module.

3. Read Customer Passwords

- If the owner loses his customer passwords, he will not be able to program customer parameters. Using factory passwords, one can read customer passwords, then use those customer passwords to program customer parameters.

4. Clear Certain Diagnostic Codes

- Diagnostic Code 190-00 (Engine Overspeed Warning) requires factory passwords to clear once it is logged. Diagnostic Code 252-11 Incorrect Engine Software (59) also requires factory passwords. It should be cleared only if you are certain the personality module is for the specific engine.

5. Unlock a "Locked" Customer Parameter

- If a Customer Parameter has been locked out, Factory Passwords are required to either unlock the parameter or change the parameter. Refer to "Customer Parameter Lockout" on page 26.

6. Enable ECM Trip Data Transfer Security

- Enabling this feature for the transfer of trip information over the data link through remote communications systems requires Factory Passwords. This feature can only be enabled after the truck has been delivered to the customer.

Certain other codes require customer passwords. The majority of logged codes require no passwords to clear. Since factory passwords contain alphabetic characters, only the ECAP or Electronic Technician (ET) may perform these functions. To obtain factory passwords, proceed as if you already had the password. At some point, if factory passwords are truly needed, the ECAP or Electronic Technician (ET) will request factory passwords and display most of the information required to obtain the passwords.

NOTE: The Customer Parameter "Parameter Lockout" may restrict changing some Customer Parameters unless Factory Passwords are obtained. If changing a Customer Parameter indicates Factory Passwords are required, it is because the Parameter has been Locked Out. See "Customer Parameter Lockout" on page 26 for a list of parameters available for lockout.

Customer Passwords

If Customer Passwords have been entered, they are then required to change ANY customer parameter. Customer Parameters are those that affect vehicle speed limits, power rating within a family, and PTO operation. See the previous section on "Customer Specified Parameters" for more detail on what parameters are customer programmable.

The ECAP, ET, or MPSI Pro-Link with the Caterpillar Cartridge may change Customer Parameters. To obtain customer passwords, contact the owner of the vehicle. If the owner has lost his passwords, customer passwords may be read using an ECAP or ET (factory passwords are required in order to read the customer passwords) by following these steps.

1. Use the ECAP or ET to access "Read/Change System Configuration Parameters", then "Read Customer Parameters".

2. When the Factory Passwords screen appears, record the information listed on the "3176B, C-10, C-12, and 3406E Factory Passwords Worksheet" (refer to "Factory Passwords Worksheet" on page 51).

3. Obtain the factory passwords. The information recorded above must be provided, and generates a permanent record at Caterpillar of the access.

4. From the Factory Passwords screen, enter the Factory Passwords.

5. When the "Read Customer Passwords" screen appears, record the Customer Passwords. The Customer Passwords may then be used to change Customer Parameters.