Basic Knowledge and Tool Skill Requirements

BASIC KNOWLEDGE REQUIRED
Before attempting to diagnose the Rear Wheel Anti Lock (RWAL) system you must have a good understanding of electrical system basics and the use of circuit testing tools. Without this basic knowledge it will be difficult to use the diagnostic procedures in the Diagnostic Charts.

Some electrical basics, basic troubleshooting procedures and hints are reviewed in Diagnostic Aids. Refer to Diagnostic Aids. Diagnostic Aids

The use of circuit testing tools are reviewed in Tools and Equipment. Refer to Tools and Equipment. Tools and Equipment

BASIC ELECTRICAL CIRCUITS
- You should understand the basic theory of electricity, series and parallel circuits, and voltage drops across series and parallel resistor systems.
- You should know the meaning of volts (voltage), amps (current), and ohms (resistance).
- You should understand what happens in a circuit with an open wire or a wire shorted to ground or battery.
- You should be able to read and understand a wiring diagram.
Refer to Diagnostic Aids. Tools and Equipment

USE OF CIRCUIT TESTING TOOLS
- You should know how to use a digital volt meter (DVM) to measure voltage, current, and resistance.
- Be aware that when DVM use is requested, the first terminal listed in the check is intended to be connected to the positive (usually red) DVM lead.
- You should be familiar with the operation and capabilities of the Tech 1 scan tool and the RWAL cartridge used with it.
- You should know how to use jumper wires to test circuits. Refer to Diagnostic Aids. Diagnostic Aids