Before performing any of the diagnostic procedures, fill in the information requested at the top of the diagnostic forms. Proper information is required. The date, miles and hours are important information for warranty purposes. The engine serial number and vehicle identification number (VIN) are important information for ordering parts and referencing service information. The engine… Read More »
Almost any mechanical problem can be accurately diagnosed under ideal conditions; but, accurate diagnosis can become the norm under everyday conditions. Much of the long term success and acceptance of an engine is actually determined by the efficiency of thousands of shop foremen and technicians. The purpose of engine diagnostic forms is to provide the… Read More »
The following tests are performed with the engine running: Section 8.4.1 Standard Test, Engine Running During the test, the ECM controls the Injection Pressure Regulator (IPR) following a pre-programmed testing sequence to evaluate the performance of the high pressure oil pump, the IPR and the injection control pressure system as a whole, both from an… Read More »
The following tests are performed with the engine OFF: Section 8.3.1 Standard Test (KOEO Test) Key Off Engine Off Tests (KOEO) are standard tests performed by the ECM. These tests are commanded by the technician using the Electronic Service Tool (EST) or using the Self Test Input (STI) push-button switch. To perform the test using… Read More »
Diagnostics are performed by the ECM continuously to detect out of range rationality and system faults. During the time that the key is ON, if an input signal is out of range, meaning the signal is either greater or lesser than what the signal range should be during normal operation, the ECM will record a… Read More »
The following flow chart will enable diagnostic fault code detection: See Figure “Diagnostic Software Test Chart” . Figure 1. Diagnostic Software Test Chart Series 40E Troubleshooting Manual – 6SE241 Generated on 10-13-2008
Optional features on the Series 40E engine include the following: Section 7.2.1 Cruise Control Cruise Control provides vehicle speed using automotive style On, Off, Set/Coast, and Resume/Accel switches. Speed control is disabled when the service brakes are applied, the clutch pedal is depressed, or an automatic transmission is placed in neutral. The accelerator pedal can… Read More »
This section covers standard features of the Series 40E engines. Section 7.1.1 Electronic Governor Control The Series 40E engines are fully electronically governed over all operating ranges. Section 7.1.2 American Trucking Association Data Link Provisions Vehicles are equipped with an American Trucking Association (ATA) data link connector that allows communication between the electronic engine control… Read More »
A description of the types of sensors follows. Section 6.2.1 Thermistor A thermistor is a type of sensor that changes its electrical resistance with temperature to which it is being exposed. The electrical resistance of the thermistor decreases as temperature increases and increases as temperature decreases. The sensor, in conjunction with a current limiting resistor… Read More »
Engine and vehicle sensors transmit input signals to the ECM by either: Controlling a reference voltage to produce an analog or digital signal (i.e. ICP, EOT) Generating an analog or digital signal voltage i.e. CMP, VSS Switching an analog 12 volt signal i.e. IVS, DDS Section 6.1.1 Reference Voltage Sensors Reference voltage sensors are supplied… Read More »