DESCRIPTION SERVICE MANUAL NUMBER 22
Page 5A-4 90-860074--1 FEBRUARY 2002
Precautions
CAUTION
To reduce the chance of personal injury and/or property damage, the following
instructions must be carefully observed: proper service and repair are important to
the safety of the service technician and the safe, reliable operation of all Mercury
MerCruiser Electronic Diesel Injection (EDI) equipped engines. If part replacement
is necessary, the part must be replaced with one of the same part number or with
an equivalent part. Do NOT use a replacement part of lesser quality. The service
procedures recommended and described in this service manual are effective
methods of performing service and repair. Some of these procedures require the
use of tools specially designed for the purpose. Accordingly, anyone who intends
to use a replacement part, service procedure or tool, which is not recommended by
the system manufacturer, must first determine that neither his safety nor the safe
operation of the engine will be jeopardized by the replacement part, service
procedure or tool selected. It is important to note that this manual contains various
“Cautions” and “Notes” that must be carefully observed in order to reduce the risk
of personal injury during service or repair, or the possibility that improper service
or repair may damage the engine or render it unsafe. It is also important to
understand that these “Cautions” and “Notes” are not exhaustive, because it is
impossible to warn of all the possible hazardous consequences that might result
from failure to follow these instructions.
The following requirements must be observed when working on EDI equipped engines:
• Before removing any ECM (Engine Control Module) system component, disconnect
the negative battery cable.
• Never start the engine without the battery cable terminal ends being solidly
connected.
• Never separate the battery from the on-board electrical system while the engine is
operating.
• Never separate the battery feed wire from the charging system while the engine is
operating.
• When charging the battery, disconnect it from the boat’s electrical system.
• Ensure that all cable harnesses are connected solidly and that battery connections
are thoroughly clean.
• Never connect or disconnect the wiring harness at the ECM when the ignition is
switched ON.
• Before attempting any electric arc welding, disconnect the battery leads and the
ECM connector.
• When steam cleaning engines, Do NOT direct the steam cleaning nozzle at ECM
system components. If this happens, corrosion of the terminals or damage of
components can take place.
• Use only the test equipment specified since other test equipment may either give
incorrect results or damage good components.
• All voltage measurements using a voltmeter require a digital voltmeter with a rating
of 10 megohms input impedance.
To Next Page
Loading...
Need help?
General