Initial Inspection and Diagnostic Overview

The battery, starting, and charging systems operate with one another, and must be tested as a complete system. In order for the vehicle to start and charge properly, all of the components involved in these systems must perform within specifications.

Engine Systems covers the Battery, Starting System, and Charging System. We have combined these systems to make it easier to locate the information you are seeking. However, when attempting to diagnose any of these systems, it is important that you keep their interdependency in mind.

The diagnostic procedures used includes most conventional diagnostic methods. The use of an induction-type milliampere ammeter, volt/ohm meter, battery charger, carbon pile rheostat (load tester), and 12-volt test lamp may be required.




INSPECTION
Before removing any unit from the starting system for repair or diagnosis, perform the following inspections:

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO PASSIVE RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

- Visually inspect the battery for indications of physical damage and loose or corroded cable connections. Determine the state-of-charge and cranking capacity of the battery. Charge or replace the battery, if required. in the proper section of Engine Systems for complete service information for the battery.
- Visually inspect the ignition switch for indications of physical damage and loose or corroded wire harness connections, in the proper section of Ignition System for complete service information for the ignition switch.
- Visually inspect the starter motor for indications of physical damage and loose or corroded wire harness connections.
- Visually inspect the starter solenoid for indications of physical damage and loose or corroded wire harness connections.
- Visually inspect the wire harnesses for damage. Repair or replace any faulty wiring, as required. Refer to the Wiring Diagrams for complete service information and circuit diagrams for the starting system wiring components.