90517 Mercruiser NUT, PUMP STUD(METRIC)

Connecting ECAP to ECM
The Electronic Control Analyzer Programmer (ECAP) is powered by the 24 volts DC through J13/P13 connector. Use the following procedures to connect the service tool to the engine:A. The ECAP may be connected to the ECM at J13, the 9-pin, gray plastic, ATA Deutsch brand connector labeled Engine Data Link Connector. Only one side of the "T" harness connector cable is used. Remove the cap on J13 and replace once testing has been completed.B. Connect the opposite end of the "T" cable to the ECAP.C. The ECAP will operate with the engine running, or with the engine off, key "ON". If the ECAP does not communicate with ECM, refer to P-312: ECAP Will Not Communicate With ECM.System Configuration Parameters
System Configuration Parameters are those that affect emissions or horsepower of the engine. They are programmed at the factory and would normally never need to be changed through the life of the engine. Proper values for these parameters are stamped on the engine information ratings plate located on the valve cover or intake manifold. Factory Passwords are not required to change these parameters. Figure 1. on page 28 is an example of the ECAP screen displaying System Configuration Parameters. The following is a brief description of the System Configuration Parameters:Full Load Setting:
Number representing fuel system adjustment made at the factory to "fine tune" the fuel system. Correct value for this parameter is stamped on the engine information ratings plate.Full Torque Setting:
Similar to Full Load Setting.Personality Module Code:
Code which prevents use of incorrect personality module for this engine. Each power rating family and emission certification has a different code associated with it. This code (stored in ECM) MUST match that in the personality module or a Diagnostic Code 56 will be generated. When rerating or installing a new ECM, programming this code to "0" will prompt the ECM to read and match its stored code to the personality module. Note that this code DOES NOT need to be programmed when a personality module is replaced, as long as the new module is of the same family. If the Personality Module is of a different family, then pistons, nozzles, etc. may need to be changed and the engine information plate should also be changed to reflect the rerate.Engine Serial Number:
Should be programmed to match the engine serial number stamped on the ratings plate. A new ECM is delivered with the engine serial number programmed to 0XX00000.Customer Specified Parameters
Customer Specified Parameters allow a customer to program some engine/system related parameters.Customer parameters may be changed repeatedly. Customer Passwords are required to change these parameters. Figure 2. on page 28 is an example of the ECAP screen displaying Customer Specified Parameters. The following is a brief description of the Customer Specified Parameters. Along with each are the minimum and maximum values for the parameter and the default value. The parameter value shown in bold is the setting which should be programmed if the feature is not used.Low Idle Engine Speed:
Minimum engine speed which may be programmed to any value between 600 rpm to 750 rpm range. Engine Location:
Used to program engine location (PORT or STBD). This parameter does not affect engine operation. However, it does affect CMS (Computerized Monitoring System) display panel. This parameter is used to display engine synchronization status, i.e. synchronized to PORT or STBD throttle on the CMS display.Trolling Speed:
Trolling speed can be programmed to any value from 900 to 1200 rpm. Passwords
Factory Passwords
Factory passwords are required to perform the following functions:1. 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.2. Clear Certain Diagnostic Codes Only Diagnostic Codes 190-00 (Engine Overspeed Warning) and 23-02 (Excessive Engine Power) require factory passwords to clear once they are logged. Certain other codes require customer passwords. The majority of logged codes require no passwords to clear.To obtain factory passwords, proceed as if you already had the password. At some point, if factory passwords are truly needed, the ECAP will request factory passwords and will provide on its screen most of the information required to obtain the passwords.Customer Passwords
Customer passwords are required to change ANY customer parameter. See the previous section on "Customer Specified Parameters" for more detail on what parameters are customer programmable.To obtain customer passwords, contact the owner of the vessel. If the owner has lost his passwords, customer passwords may be read using an ECAP (factory passwords are required in order to read the customer passwords) by following these steps:A Use the ECAP to access "Read/Change System Configuration Parameters", then "Read Customer Parameters".B. When the Factory Passwords screen appears, record the information listed on the "Factory Passwords Worksheet" (in this section).C. Obtain the factory passwords. The information recorded above must be provided, and generates a permanent record at Caterpillar of the access.D. From the Factory Passwords screen, enter the Factory Passwords.E. When the "Read Customer Passwords" screen appears, record the Customer Passwords. The Customer Passwords may then be used to change Customer Parameters.Programming a New ECM
The Marine Electronic Control Module (ECM) is the heart of the system. So when a problem occurs, it is easy to jump to the conclusion that the ECM is responsible. That is usually the wrong conclusion. There are no moving parts inside, therefore, the ECM very seldom fails.Most failures occur at a sensor input/output, or in the wiring and connectors. Follow the troubleshooting guide procedures, and don't replace an ECM on speculation!However, when your troubleshooting indicates that a failure has, in fact, occurred in the ECM, then temporarily mount a new ECM on the side of the engine and thoroughly Retest. If the problem is no longer present, then proceed with the following steps required to permanently replace a faulty ECM.ECM Replacement Procedure
1. Record customer parameters from failed ECM. If ECAP is unable to communicate with the ECM, go to Step 2.A. Obtain and record the Customer