Test Preparation

Correct test results for the Quick Test are dependent on the proper operation of related non-EEC components systems. It may be necessary to correct faults in these areas before EEC will pass Quick Test.

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

1. Verify the condition of air cleaner and ducting. These components may be removed and reinstalled as necessary for service and/or inspection.

2. Check all engine vacuum hoses for:
- Leaks of pinched hoses.
- Proper emission routing per Vehicle Emission Control Information (VECI) Decal.

3. Check the EEC system wiring harness electrical connections for:
- Proper connections.
- Loose or detached connectors, wires and terminals.
- Corrosion.
- Proper routing of harness.

It may be necessary to disconnect or disassemble the connector assembly to perform some of the inspections. (Note the location of each pin before disassembly.)

4. Check processor, sensors and actuators for physical damage.

5. Perform all safety steps required to start and run operational vehicle tests.

6. Apply the emergency brake. Place shift lever in Park; Neutral for manual transmission.

7. Turn Off all electrical loads such as the radio, lamps, air conditioner, etc. Be sure doors are closed whenever readings are made.

8. Verify engine coolant is at the specified level.

9. Start engine and idle until the upper radiator hose is hot and pressurized and the throttle is off fast idle. While the engine is operating, check for leaks around the exhaust manifold, EGO sensor, and vacuum hose connections.

NOTE:
If engine will not start, idles rough or runs rough continue through Quick Test Step 3.0. If any of the above conditions are still present after a pass code 11 in the Key On, Engine Off self-test, go to Pinpoint Test Step A2 for no start or diagnostics.

10. Turn ignition Key Off.

11. Service items as required, and proceed to equipment hook-up.