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Connecting ECAP or DDT to PEEC III
1This is a subscription, since it is anticipated that it will be changin g at regular intervals.The Electronic Control Analyzer Programmer (ECAP) and Digital Diagnostic Tool (DDT) are powered by the 12 volts DC from the vehicle battery. This permits operation on the ground or in the cab of a truck, which allows taking readings during vehicle operation. Use the following procedures to connect the service tool to the engine:A. The ECAP or DDT may be connected to the PEEC III system at J8, the 9-pin, gray plastic, Deutsch brand connector labeled Engine Data Link Connector. Only one side of the "T" harness connector cable is used. Remove the cap on J8 and replace once testing has been completed.B. Connect the opposite end of the "T" cable to the ECAP or DDT.C. The ECAP or DDT will operate with the engine running, or with the engine off, key on. If the ECAP or DDT does not communicate with PEEC III, refer to P312; ECAP/DDT will not communicate with PEEC III.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 required to change these parameters. Figure 1. on page 20 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 horsepower 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 and the engine will only run at low idle. 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 PM 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 restrict how a driver operates the vehicle. Some parameters may affect engine operation in ways that the inadequately trained driver does not expect. These parameters may lead to power or performance complaints, even when the engine is performing to specification.For detailed instructions on how to program PEEC III for optimum performance and fuel economy, refer to LEKT8467, Specing for Peak Performance.Customer parameters may be changed repeatedly as a customer changes his operation or as new drivers are assigned to a truck. Customer Passwords are required to change these parameters. Figure 2. on page 20 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.Vehicle Speed Parameters
Vehicle Speed Cal:
Maximum 65,535 ppmMinimum 1,717 ppmDefault 858 ppmUsed by the ECM to scale vehicle speed reading into miles per hour. Programmed in pulses per mile. For more information refer to P-504; Vehicle Speed Calibration, it this manual.Vehicle Speed Limit (VSL):
Top vehicle speed the ECM will permit. The ECM will shut off fuel above this speed. Maximum 127 mph and/or gear limit of truckMinimum 30 mphDefault 127 mphEngine RPM at VSL:
RPM that engine will turn at programmed Vehicle Speed Limit (VSL). The ECM will limit to this RPM only when it sees no vehicle speed signal, and the engine is loaded. This is a tamper proofing feature against running without a Vehicle Speed input to the ECM. Maximum 3,000 rpmMinimum 1,300 rpmDefault 3,000 rpmCruise Control Parameters
Low Cruise Limit:
The lowest mph at which cruise can be engaged. Maximum 127 mphMinimum 15 mphDefault 15 mphHigh Cruise Limit:
The highest mph at which cruise can be engaged. Maximum 127 mphMinimum 30 mphDefault 127 mphEngine Retarder Mode:
With the cruise control On/Off switch On, the operation of the retarder is controlled through the customer parameter "Engine Retarder Mode". Programming the parameter to "Coast" allows retarding with the service brakes applied, but allows the engine to coast with no retarding after they are released. Programming the parameter to "Latch" allows retarding with the service brakes applied and keeps the retarder latched On after the service brakes are released (until rpm drops below 950 rpm or the driver presses the throttle or clutch pedal).With the cruise control On/Off switch in the Off position, the retarder is enabled when the engine rpm is greater than 950 rpm and the drivers foot is off the throttle pedal and clutch pedal.Refer to P-517: Retarder Enable Signal for more detail on information and operation.PTO Governor Parameters
PTO Mode Speed Limit:
Maximum mph for PTO mode. Maximum 15 mphMinimum 1 mphDefault 1 mphPTO Mode RPM Limit:
Maximum engine rpm in PTO mode. Maximum 3,000 rpmMinimum 600 rpmDefault 3,000 rpmProgressive Shifting Parameters
Low Gears #1 RPM Limit:
Engine rpm limited below "Low Gear #1 Turn Off Speed. PEEC III will pause at this rpm, then allow slow acceleration up to Top Engine Limit. This is to encourage the driver to shift to the next highest gear. Maximum 3,000