06 ELECTRICAL SYSTEM
Page ELECTRICAL SYSTEM - 36
Z001019/0_6_July 2008
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
High engine coolant
temperature
limit exceeded
Defect - engine coolant
sensor or
sensor connection
Exhaust temperature
limit exceeded
Defect - Exhaust
temperature sensor or
sensor connection
Oil pressure below limit
Defect - Oil pressure
sensor or sensor
connection
Insufficient boost
pressure or defictive
sensor
Additional
Tool-Readings
Steyr Diag
Power limitation
Steyr Diag
Service code
Steyr Diag
Power limitation
Steyr Diag
Service code
Steyr Diag
Power limitation
Steyr Diag
Service code
Steyr Diag
Power limitation
Panel
Indication
Horn ON 2x p. sec.
Gauge reading >
107 °C
Horn ON 2x p. sec.
Gauge reading >
120 °C
Horn and indication
light "CEL" ON 2x
p. sec.
Horn and indication
light "CEL" ON 2x
p. sec.
Horn continuos and
Oil indication light
continuos switched
ON
Oil pressure indication
light switched ON 1x
p. sec.
Effect
noticed
Reduction of
engine speed
Reduction of
engine speed
Reduction of
engine speed
Reduction of
engine speed
Reduction of
engine speed
Reduction of
engine speed
Reduction of
engine speed
Action or
possible reason
See table trouble
shooting:
Cooling system
Sensor or connector
failure; see service
code table
See table trouble
shooting: Raw water
cooling system
Sensor or connector
failure; see service
code table
See table trouble
shooting:
Engine oil system
Sensor or connector
failure; see service
code table
See table trouble
shooting:
Air charge system
ToC
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