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ELECTRICAL SYSTEM SERVICE MANUAL MARINE ENGINES 06.10.05.03 Check boost pressure sensor, B12, for engine models: 94 / 114 / 144 / 126 / 166 / 236 100 microbar (absolute) Athmospheric pressure PSI 10.05 ill.7 For engine models: 164 / 174 / 246 / 256 / 266 5,0 4,5 Output - voltage (Volt) 4,0 3,5 3,0 2,5 2,0 1,5 1,0 0,5 0,0 0,0 0,5 1,0 1,5 2,0 2,5 3,0 3,5 4,0 10.05 ill.8 Absolut - air pressure (bar) Supply voltage 5V +/- 0,2V Connector position A = +5V B = GND C = Signal Max. pressure with 3 bar (3,5 absolut) NOTE: Before checking the boost pressure sensor, check air filter, sensor hose and connector. Pressure test: For a pressure test of the sensor, disconnect the sensor hose and connect a pressure gauge with a short piece of hose to the sensor. Carefully pressurize the sensor. Read and record the values on the gauge (input pressure) and on the display (output pressure) for 5 spots between 0 and 1.5 bar. Compare recorded input and output values with the chart. - If values are not within tolerance limits, replace the boost pressure sensor. - If values are within tolerance limits, the boost pressure sensor is functional and the turbocharger must be checked. Page ELECTRICAL SYSTEM - 88 Z001019/0_6_July 2008
ToC SERVICE MANUAL MARINE ENGINES ELECTRICAL SYSTEM 06.10.05.04 Check speed sensor B15 and/or wiring X15 1 23 X 15/1 15012-06 X15/2 60113-01 X15/3 31000-03 10.05 ill.9 On account of the sensor's integrated electronic system, only the supply voltage and/or the output signal and the continuity to control unit A5 can be measured. Make sure that with disconnected plug X15 and ignition "ON" an error code can be stored --> At completion of checking, cancel the error code; refer to 06.06.04 Use a standard voltmeter / multimeter to measure the supply voltage and/or the resistance. Supply voltage Ubat (12V +/- 2V) ignition ON main relay K27 active measurement point GND on X15/3 against +supply voltage on X15/1 Continuity from X15/2 to control unit X5/33 max. resistance 2 ohms If supply voltage and transition from X15/2 to X5/33 are connect, replace the speed sensor. In case an error was detected during preceding measurements, check wiring according to circuit diagram and wiring harness diagram. Z001019/0_6_July 2008 Page ELECTRICAL SYSTEM - 89
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STEYR MARINE ENGINES 4 CYLINDERS +
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PREFACE STEYR MOTORS GmbH has devel
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