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.