Daihatsu Workshop Manuals
Charade L4-1295cc 1.3L (1989)
Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Control Module > Component Information > Diagrams > Diagram Information and Instructions > Page 8
Power Door Lock Control Module: Diagnostic Aids
ELECTROSTATIC DISCHARGE DAMAGE
Electronic components used in automotive computers are designed to operate at very low voltages (3-5V), and are extremely susceptible to damage
There are several ways in which a person can become statically charged. The most common methods of charging are by friction and induction.
Friction between organic materials (such as cotton or leather) and synthetics (such as plastic, vinyl, or glass) will generate static charges as great as
Charging by induction occurs when a person standing near a highly charged object (strong magnetic field such as a transformer) momentarily touches
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
USE OF PROPER TOOLS AND TESTING PROCEDURES
Use a Digital Volt/Ohm Meter (DVOM) with a minimum 10 mega-ohms internal impedance when testing an ECM or related components, unless use of
Analog meters have low internal impedance and cause circuit "loading" in low voltage circuits, resulting in inaccurate measurements and possible
Use of a DVOM is necessary to obtain accurate measurements and avoid damaging low voltage ECM circuits and components.
Always follow recommended testing procedures. Never ground or apply voltage to a circuit unless specified by a testing procedure. ECM's provide a
NOTICE: To avoid possible damage to electronic components, observe the following precautions:
1. Discharge any static electrical charges before handling sensitive parts by touching ground or maintaining a ground connection to a bare skin area
like the wrist, when servicing sensitive parts.
2. Never touch the ECM connector pins, integrated circuit connector pins, or soldered components on the ECM circuit board.
7. In order to disable the ignition system, unplug the primary connections only. NEVER disconnect the secondary leads to disable the ignition
8. Do not use a self powered test lamp to check continuity.
10. When charging a battery, be sure battery cables are disconnected.
NOTE: Before removing battery ground, access trouble codes. ECU memory will be erased if ground cable is removed.
12. When measuring voltage at the control unit harness connector, disconnect harness connector first, then turn ignition "ON" as necessary.
measurements through pin.
14. Avoid getting water on any of the Fuel and Engine Control System Components.
|[PREV PAGE] [NEXT PAGE]|