Visual Inspection

Before proceeding with self-diagnostics, visually check the following and prepare vehicle as follows:

• Perform all necessary safety precautions to prevent personalinjury or vehicle damage.
• Block drive wheels. Set parking brake. Place shift lever in Park (A/T) or Neutral (M/T). DO NOT move shift lever during test unless specifically directed to do so.
• Check condition of air cleaner and air ducting.
• Check all vacuum hoses for leaks, restrictions and proper routing.
• Check EEC system wiring harness connections for corrosion, damaged pins, loose wires and improper routing.
• Check ECM, sensors and actuators for physical damage.
• Check engine coolant and oil level.
• Check battery condition. Turn off all lights and accessories. Ensure vehicle doors are closed when measuring voltage.
• Check exhaust system for leaks.