Quick Test: Preparation

Before hooking up any equipment to diagnose 4EAT system, make the following checks:

• Check all vacuum hoses for leaks, restrictions and proper routing.
• Check EEC-IV and 4EAT wiring harness connections for corrosion, damaged pins, loose terminals and improper routing.
• Check control module, sensors and actuators for physical damage.
• Perform all necessary safety procedures to prevent personal injury or vehicle damage.
• Set parking brake and block drive wheels. Place shift lever in Park. DO NOT move shift lever during testing unless specifically directed.
• Turn off all lights and accessories. Ensure vehicle doors are closed when making voltage or resistance readings.
• Start engine and run until it reaches operating temperature.
• Turn ignition off. Service items as required, then go to EQUIPMENT HOOK-UP.