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ToC 06 ELECTRICAL SYSTEM SERVICE MANUAL MARINE ENGINES 06.06 ELECTRONICS - GENERAL Wiring In case of necessary repair of a cable connection, take special care that cable quality, isolation, crimping, strand end soldering of cable sockets as well as protective varnish isolation and/or connector locks meet the respective requirements. Tools for crimp connections to be found in tool catalog P/N Z001002/0 "Level 4". 06.06.01 Electronic Engine Management System The STEYR Marine engine is equipped with an Electronic Management System (EMS) that performs the following: * controls engine functions to ensure maximum efficiency. * self-diagnostic to protect the engine from damage if operating parameter are exceeded. * stores diagnostic data of EMS server circuits for maintenance and service. Engine power is reduced if: Operating Parameter Effect noticed Panel Indication Additional Tool-Readings Action or possible reason High engine coolant temperature limit exceeded Reduction of engine speed Horn ON 2x p. sec. Gauge reading > 107 °C Steyr Diag Power limitation See table trouble shooting: Cooling system Defect - engine coolant sensor or sensor connection Reduction of engine speed Horn ON 2x p. sec. Gauge reading > 120 °C Steyr Diag Service code Sensor or connector failure; see service code table Exhaust temperature limit exceeded Reduction of engine speed Horn and indication light "CEL" ON 2x p. sec. Steyr Diag Power limitation See table trouble shooting: Raw water cooling system Defect - Exhaust temperature sensor or sensor connection Reduction of engine speed Horn and indication light "CEL" ON 2x p. sec. Steyr Diag Service code Sensor or connector failure; see service code table Oil pressure below limit Reduction of engine speed Horn continuos and Oil indication light continuos switched ON Steyr Diag Power limitation See table trouble shooting: Engine oil system Defect - Oil pressure sensor or sensor connection Reduction of engine speed Oil pressure indication light switched ON 1x p. sec. Steyr Diag Service code Sensor or connector failure; see service code table Insufficient boost pressure or defictive sensor Reduction of engine speed Steyr Diag Power limitation See table trouble shooting: Air charge system Page ELECTRICAL SYSTEM - 36 Z001019/0_6_July 2008
ToC SERVICE MANUAL MARINE ENGINES 06 ELECTRICAL SYSTEM Operating Parameter Effect noticed Panel Indication Additional Tool-Readings Action or possible reason Engine speed sensor fault Higher or unstable idle speed, limited performance No RPM inication on tachometer Steyr Diag Service code See table trouble shooting: Speed sensor Engine speed remains at idle No increase of engine speed if throttle is moved to max. Steyr Diag Service code See table trouble shooting: Accelerator potentiometer failure Governor position system Irregular engine speed or stalled engine Steyr Diag Service code See table trouble shooting: Governing system Inverse position shut down (SOLAS) Engine shut down beyond 70° deg. angle After engine stop horn remains switched ON until ignition reset Reset through ignition OFF and then ON During break in phase Cel-ON at high accelerator position (more than 75%) Indication light "CEL" is switched ON Steyr Diag Break-in phase See information break in procedure Optical and audible warning signals as shown on the dash board, are illustrated in chapter "Operating Status and Error Report" 06.06.02 Diagnostic system The electronic engine management system controls the following parameters: Oil pressure, boost pressure, coolant temperature, hi-riser (bend) temperature. The electronic engine management system has an automatic self-test program checking all data of electronic sensors. As soon as a fault is found, there is an optical or audible signal (refer to chart "Error Codes"). Occurred faults remain stored until cancellation. Stored faults may be selected, analyzed and cancelled by means of PC via diagnostic outlet. A reference to one or several stored faults is the 5 second "TESTING" of the "CHECK-ENGINE LAMP" and the "WARNING HORN" after ignition ON, instead of usual 0,7 seconds. (refer to chart "Operating Status") On the CHECK-ENGINE lamp (E) stored faults may be indicated by flashing codes. (With a special procedure, (06.06.04) individual cancellation is possible.) Error codes are regarded both as flashing codes as will as display by diagnostic instrument. There are three fault categories: temporary faults, non essential faults and essential faults. Z001019/0_6_July 2008 Page ELECTRICAL SYSTEM - 37
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STEYR MARINE ENGINES 4 CYLINDERS +
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PREFACE STEYR MOTORS GmbH has devel
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TABLE OF CONTENTS (MAIN ASSEMBLY GR
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05 Cooling system 05.01 Cooler, hea
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