Accord L4-1955cc 2.0L SOHC 2-bbl (1986)
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Mixture Control Solenoid - Slow Cut: Diagnostic Aids
Electronic Component Handling
STATIC DISCHARGE
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Discharge any static electrical charges before handling electronic parts by touching ground or maintaining a ground connection to a bare skin area
like the wrist.
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Never touch the ECU connector pins, integrated circuit connector pins, or soldered components on the ECU circuit board.
TESTING
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When measuring voltage at the control unit harness connector, disconnect harness connector with the ignition OFF, then turn ignition "ON" as
necessary.
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To prevent deforming control unit harness connectors, do not probe terminals directly. Instead, insert a pin from the harness side and perform
measurements through pin.
CONTROL UNIT DAMAGE
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Do not try to disassemble the control unit.
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Before performing electrical welding (for instance, spot welding), disconnect the battery, climate control, injection, cruise control, ECU and radio.
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If temperatures may exceed 176°F (80°C), (example: infra-red spray booth), remove all ECU's.
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Avoid getting water on any of the Fuel and Engine Control System Components.
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Never apply battery power to a component unless directed to do so in a test procedure.
Electronic Component Replacement
1.
Before servicing electronic components, disconnect the battery ground.
NOTE: Before removing battery ground, access trouble codes. ECU memory will be erased if ground cable is removed.
2.
Fuel and Engine Control System wiring should be at least 4 inches away from ignition wires.
Battery Precautions
CAUTION:
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Never use a booster/starter which has a voltage rating above 12 volts to start engine.
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Always ensure the battery is properly connected to the vehicle prior to attempting to start engine.
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Don't disconnect the battery when the engine is running.
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When charging a battery, be sure battery cables are disconnected.
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The battery contains acid and produces explosive gas (hydrogen). Avoid creating sparks near battery.
Electrical Connections and Circuits
1.
Fully release connector locks prior to disconnecting. Ensure connectors are fully seated and all insulators and shields are in place when
reinstalling.
2.
Never connect or disconnect electrical connections with the ignition switch in the "ON" position unless specifically directed to do so in a test
procedure.
3.
Do not use a self powered test lamp to check continuity.
4.
Do not create any arcing to check the continuity of a circuit.
Electrostatic Discharge
ELECTROSTATIC DISCHARGE
Electronic components used in automotive computers are designed to operate at very low voltages (3-5V), and are extremely susceptible to
damage caused by static electrical discharge. Voltages as low as 12 volts can damage computer circuits. By comparison, it takes as much as 4,000
volts of static discharge for a person to even feel the "ZAP", and there is no way of knowing whether the charge is positive or negative in nature.
There are several ways in which a person can become statically charged. The most common methods of charging are by friction and induction.
CHARGING BY FRICTION
Friction between organic materials (such as cotton or leather) and synthetics (such as plastic, vinyl, or glass) will generate static charges as great as
25,000 volts. This can happen by simply sliding across a car seat or by wearing a cotton shirt under a coat made of synthetic materials.
CHARGING BY INDUCTION
Charging by induction occurs when a person standing near a highly charged object (strong magnetic field such as a transformer) momentarily
touches ground. Like charges are displaced to ground, leaving the person highly charged with opposite polarity.
PRECAUTIONS