7744450_007 Volvo.Penta Gear

ACTIVE Diagnostic Codes
Diagnostic codes are used by the 3406E System to warn the vehicle operator of a problem. Diagnostic codes are used by the service technician to determine the nature of the problem. Some codes are used only to record an event. These codes do not indicate problems that need repair.An active diagnostic code represents a problem that should be corrected as soon as possible. Repairing the cause of an ACTIVE code will cause the code to be cleared.If an ACTIVE code is generated, the diagnostic lamp will turn ON and the lamp will remain ON. The lamp will blink at five second intervals. If the condition that generated the fault occurs only for a brief moment, the lamp will go OFF after five seconds. The code will be LOGGED.There are a few codes that are not a response to a performance problem. The codes merely record an event. These codes are 01, 35, 41 and 55. Troubleshooting is not required in these cases.Some Diagnostic Codes will cause the 3406E System to make major changes. The changes that were made are in the engine operation or the engine limits. This is a result of the code that is being generated.LOGGED Diagnostic Codes And Events
When the ECM generates a diagnostic code, the ECM usually logs the code in permanent memory within the ECM. The ECM has an internal diagnostic clock. When a code is logged, the ECM will record the hour for EACH time. Knowing the condition and the time that the code was generated can be a valuable indicator. This will help to troubleshoot intermittent problems. The logged codes can be retrieved or the logged codes can be erased. This is accomplished by using an ECAP Service Tool. The codes are valuable indicators. The codes help to troubleshoot the intermittent problems.The 3406E System must be out of Cold Mode at least ten seconds before codes will be logged. When the logging begins, any active code is permanently logged.Diagnostic Codes that are logged repeatedly may indicate a problem that needs special investigation. Codes that are logged may not need attention. These codes only need attention if the codes result in complaints by the driver. These codes can be investigated during the next scheduled maintenance interval.Refer to Electronic Troubleshooting, RENR 1328, "Troubleshooting with a Diagnostic Code" for the procedure to troubleshoot a Logged Diagnostic Code. Refer to Electronic Troubleshooting, RENR 1328, "Troubleshooting Without A Diagnostic Code" if the symptoms continue.Note: The most likely cause of an intermittent problem is a faulty connection or damaged wiring. The next most likely cause is a component failure (sensor or switch for example). The least likely cause is the ECM.3406E Electronic Service Tools
The Caterpillar electronic service tools for the 3406E Electronic Control System are designed to help the service technician in analyzing the faults and locating the problems within the system. The electronic service tools are required to perform sensor calibrations. The electronic service tools will read the programmable engine parameter. The electronic service tools will also change the programmable engine parameter.The tools have small plug-in modules. These modules are called Service Program Modules (SPM). These modules adapt the basic tools to a particular engine or a particular application.The 3406E Diesel Truck Engine requires an electronic service tool to communicate with the 3406E Electronic Control Module and read certain Diagnostic Codes. This service tool is capable of performing the following functions:reading the various sensor output signals, reading status inputs, switching status inputs and electronically calibrating the Boost Sensor. The ECAP can calibrate the Speed/Timing Sensor. The ECAP measures Pulse Width Modulation(PWM) signals. such as those produced by the throttle position sensor.Installation OR Removal Of The Speed/Timing Sensor
Table 1
Tools Needed
9S-9082 Engine Turning Tool 1
Illustration 1 g00305643
Engine Front (Right Side)
(1) Speed/timing sensor. (2) "P9/J9" Connector.
Disconnect the speed/timing connector "P9/J9" (2). Inspect the connector for the following conditions.
Corrosion
Bent pins
Missing pins
Damaged sockets
Mismating
Broken wires
Remove the Speed/timing sensor (1) from the front gear cover.
Examine the plastic end of the sensor for signs of wear or contaminants such as metal filings. The plastic end of the speed/timing sensor should have no contaminants and should show no wear (greater than 0.051 mm (0.0020 inch) from the face).
Use a screwdriver to carefully pry the plastic sensor end to the fully extended position (approximately 4.775 mm (0.1880