EG-13
ECM GENERAL SERVICE INFORMATION
Control Unit and Electronic Component
PRECAUTIONS
• Never reverse polarity of battery terminals.
• Install only parts specified for each model.
• Before replacing a control unit, check input and output signals
to/from the control unit, and component functions.
• When disconnecting a connector, do not twist or apply
excessive force.
• For a bolt-type connector, loosen the bolt first, then hold the
main body of the connector to disconnect.
• Before connecting a connector, check terminals for bends or
breakage. Connect it securely. For a bolt-type connector, screw
in the bolt until the colored lug is flush with the surface to be
sure it is securely connected.
• Do not drop, hit, or subject control units to impact.
• Be sure to protect control units from condensation caused by a
sudden shift in temperature, or from raindrops or splashes. If
any water drops adhere to the unit, dry it well prior to
installation.
• Be sure to protect control unit connectors from oil.
• Avoid cleaning control units with benzine.
• Do not open a top or bottom cover on a control unit.
• When using a circuit tester, ensure the appropriate distance
between test probes. A longer distance is recommended,
because if the distance is too short, it may cause contact of the
test probes, resulting in a short circuit. A short circuit allows
battery voltage to be applied directly to the control unit, resulting
in damage to its internal power transistors.
• Use the specified check adapter to check input and output
signals to/from control units.
EGM0062
EGM0063
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