Digital input signals have only two states: • ON or OFF. Example of digital input signals: – Speed sensor pulses of a Hall sensor (VSS (Vehicle Speed Sensor)). These signals can be processed directly by the microprocessor.
Inductive input signals are pulsed signals that transmit information about the engine speed and reference mark. Example: • CKP sensor The inductive signal is processed in an internal PCM circuit. Interference pulses are suppressed and the pulsed signals are converted into digital square-wave signals.
Analog input signals can have any voltage value within a given range. Examples of analog input signals include: • IAT (Intake Air Temperature), • MAP, • ECT (Engine Coolant Temperature). As the microprocessor of the PCM can only process digital signals, the analog input signals must first be converted. This is performed internally in the… Read More »
NOTE: If the PCM has been programmed with the latest software version using WDS, ensure that the IDM is programmed with the latest software version as well. If this was not done automatically at the re-programming stage, then it must be done manually immediately. Otherwise increased combustion noise, increased fuel consumption and black smoke emissions… Read More »
1 CHT sensor 2 Manifold absolute pressure sensor with integrated T-MAP sensor 3 MAF sensor 4 APP sensor 5 BPP switch 6 CPP switch 7 Position sensor in EGR valve 8 CKP sensor 9 CMP sensor 10 KS 11 Fuel pressure sensor 12 Electric EGR valve (some versions with emission standard IV) 13 Ignition lock… Read More »
1 CHT (Cylinder Head Temperature) sensor Manifold absolute pressure sensor with integrated 2 T-MAP (Temperature And Manifold Absolute Pressure) sensor 3 MAF (Mass Air Flow) sensor 4 APP (Accelerator Pedal Position) sensor 5 BPP (Brake Pedal Position) switch 6 CPP (Clutch Pedal Position) switch 7 Position sensor in EGR valve 8 CKP (Crankshaft Position) sensor… Read More »
As previously mentioned, a considerable reduction in diesel particulate matter has already been achieved by modifications to the engine. Since the introduction by the EU Commission in 1989 of the first emission standard for diesel passenger vehicles, the limit for diesel particulates has been reduced from 1.1 g/km by a factor of 22 to only… Read More »
Maximum exhaust emission levels for passenger vehicles in grams per kilometer (g/km) In order to meet the increasingly stringent emission standards, exhaust gas after treatment will increase in significance even for diesel engines, despite the progress made with regard to engine modifications. By constantly improving the injection systems (direct injection in conjunction with constantly increasing… Read More »
A fault occurring for the first time is labeled in the freeze frame data as a suspected fault (pending code) and is stored in the data memory. If the fault is not confirmed in the next check, it is erased. If it is confirmed during the third drive cycle, the suspected fault is automatically converted… Read More »
The MIL is located in the instrument cluster and shows an engine icon (international standard). The MIL warns the driver that the EOBD system has detected an emissions-related fault in a component or system. If an emissions-related fault is detected and if this fault is confirmed during the third driving cycle, the MIL is switched… Read More »