See Figures 1, 2 and 3
Engines equipped with an electronically controlled carburetor use an ECM that does not store trouble codes. However, the system does provide some self-diagnostic capabilities. By observing the ECC system inspection lamp, located on the instrument panel, some basic system operating information can be obtained. Use the following procedure to evaluate system operation.
- Check the ECU and oxygen sensor harness connector for damage or corrosion.
- Verify the ECC the inspection harness connector is disconnected.
- Turn the ignition switch ON and check the ECC inspection light on the instrument panel. If the bulb does not light, replace the bulb or repair wiring.
- If the light stays ON , start the engine and warm.
- Run the engine to 2000 rpm, for about 5 minutes. If the light goes OFF , there is no trouble.
- If the light stays ON , turn the engine OFF and connect the Electronic Controlled Carburetor (ECC) test connector near the wiper motor.
- Run the engine at idle to receive lighting intervals. If no light exists, check for an opening in the oxygen sensor circuit.
- If the light comes ON , check the lighting intervals and compare the reading to the ECC inspection lamp diagnostic chart.
- Proceed with testing of the appropriate components, according to the results received in Step 7.