What you should do

You perform preliminary checks for several reasons:

• To detect if the cause of the complaint is VISUALLY OBVIOUS
• To identify parts of the system that work correctly
• To accumulate enough data to correctly and accurately search for a ISUZU Service Bulletin on ISUZU Web site.

The initial checks may vary depending on the complexity of the system and may include the following actions:

• Operate the suspect system
• Make a visual inspection of harness routing and accessible/visible power and ground circuits
• Check for blown fuses
• Make a visual inspection for separated connectors
• Make a visual inspection of connectors (includes checking terminals for damage and tightness)
• Check for any DTCs stored by the on-board computers
• Sense unusual noises, smells, vibrations or movements
• Investigate the vehicle service history (call other dealerships, if appropriate)