How to Perform Trouble Diagnosis for Quick and Accurate Repair: Introduction

WARNING: This page is about a different car, the 2007 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

Before troubleshooting, verify customer complaints.
If a vehicle malfunction is difficult to reproduce, harnesses, harness connectors or terminals may be malfunctioning. Hold and shake these parts to make sure they are securely connected.
When using a circuit tester to measure voltage or resistance of each circuit, be careful not to damage or deform connector terminals.