Accord L4-2156cc 2.2L SOHC (1991)
Static charges are gradually equalized by moisture in the air, but are retained much longer when humidity is low. Use care when handling and
testing electronic components.
Proper Tools and Testing Procedures
DIGITAL VOLT/OHM METER
Use a digital volt/ohm meter (DVOM) with a minimum 10 mega-ohms internal impedance when testing an ECU or related components, unless use
of an analog meter is specified by a testing procedure. Analog meters have low internal impedance and cause circuit "loading" in low voltage
circuits, resulting in inaccurate measurements and possible damage to components. Use of a DVOM is necessary to obtain accurate measurements
and avoid damaging low voltage ECU circuits and components.
TESTING PROCEDURES
Always follow recommended testing procedures. Never ground or apply voltage to a circuit unless specified by a testing procedure. ECU's provide
a regulated constant low voltage source to some circuits, which may require a minimum resistance (impedance) to operate. Directly grounding or
applying battery power to these circuits could damage the ECU and cause a system failure.
Continuity and Resistance Check
Meter Types
1.
Use a digital or analog multimeter with a minimum 10k ohm resistance.
2.
Disconnect the battery or connector so there is no power between the check points.
3.
Set the ohmmeter to the appropriate range.
Continuity And Resistance Check
4.
Connect the two leads of the meter to each of the check points.
