Westerbeke 6.5 MCG Service Manual page 62

SOFTWARE DIAGNOSTICS
ENGINE SHUTDOWNS RUN STATE:
Engine Run State • DC circuit breaker on, generator started
and running.
WARNING/DESCRIPTION PROBLEM PROBABLE CAUSE
Battery Voltage Low Less than 11 volts
1. Dead battery.
2. Blown fuse.
3. Faulty regulator or charging circuit.
4. Loose connection or corroded wiring.
~··
Exhaust Temperature High Open circuit 1. Faulty exhaust temperature switch.
2. Loose connection or corroded wiring.
3. Seawater flow blocked.
External Alarm
Open circuit 1. External alarm fault (ie. Fireboy).
2. Loose connection or corroded wiring.
Wideband 02 Sensor (WB02) ECU measures 1. Excessively rich or lean combustion.
Reading Out of Table A. <.70 or A. >2.00, which 2. Loose connection or corroded wiring.
is out of the table range 3. Oxygen sensor faulty.
Wideband 02 Sensor (WB02) A. reading not crossing 1. Excessively rich or lean combustion.
Failure to Cross Stoich above and below A.
=
1.00 at 2. Excessive fuel caused by faulty ECU or MAP sensor ..
least once per minute
3. Dirty or clogged fuel injector(s).
4. Insufficient fuel supply or pressure.
Wideband 02 Sensor (W802) Heater current out of normal range
1. Loose connection or corroded wiring.
Heater Failure 2. Oxygen sensor faulty.
Lambdo Set Point Not Achieved On after start-up 1. Running too rich.
High DC Voltage Charge 16 VDC + 1. Check battery charger.
60