LINES GP-AIR 7C3335 - Caterpillar

each of the following four 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. Read customer passwords. - If the owner loses his customer passwords, he will not be able to program Customer Specified Parameters. Using factory passwords, one can read customer passwords, then use those customer passwords to program Customer Specified Parameters.3. Clear certain diagnostic codes. - Diagnostic Code 190-00 (Engine Overspeed Warning) requires factory passwords to clear once it is logged.
Installing an ECM with a 3400 Marine Engine Personality Module on another engine (or the reverse) will damage the engine. Be sure the Personality Module is correct for your engine.
To obtain factory passwords, proceed as if you already had the password. At some point, if factory passwords are truly needed, the ECAP or ET will request factory passwords and display the information required to obtain the passwords.Customer Passwords
If customer passwords have been entered, they are then required to change ANY Customer Specified Parameter. Customer Specified Parameters are those that affect engine rpm limits and power rating within a family. Refer to the Customer Specified Parameters for more detail on what parameters are customer programmable.The ECAP or ET Electronic Service Tools may change Customer Specified Parameters. To obtain customer passwords, contact the owner of the unit. If the owner has lost his passwords, customer passwords may be read using an Electronic Service Tool (factory passwords are required in order to read the customer passwords). Follow the procedure below.1. Use the Electronic Service Tool to access Read/Change System Configuration Parameters, then read customer parameters.2. When the Factory Passwords screen appears, record the information listed on the Factory Passwords Worksheet.3. Obtain the factory passwords. The information recorded above must be provided, and generates a permanent record at Caterpillar of the access.4. Enter the factory passwords from the Factory Passwords screen.5. When the Read Customer Passwords screen appears, record the customer passwords. The customer passwords may then be used to change Customer Specified Parameters.System Configuration Parameters are protected by factory passwords. Factory passwords are calculated on a computer system available only to Caterpillar dealers. Since factory passwords contain alphabetic characters, only an ECAP or ET Electronic Service Tool may change System Configuration Parameters. System Configuration Parameters affect power family or emissions.Customer Specified Parameters are protected by customer passwords. The customer passwords are programmed by the customer. Refer to Programmable Parameters, for more details when passwords are needed and how to obtain them.ECM Replacement Procedure; Replacing The Electronic Control Module With A New ECM
The Electronic Control Module (ECM) is the heart of the electronic control system used on the 3408 and 3412 High Performance Marine Engine. The ECM contains no moving parts, has a very high reliability rating and replacement can be time consuming. Most problems occur in the connectors, wiring, or sensors. Follow the