![]() Turn the ignition switch on, but do not start the engine.Ģ. Use Mode III to retrive all stored trouble codes in memory.ġ. If the RED LED stays on or off above 2000 RPM, complete the diagnostics before beginning repairs. If the RED LED stays on, the mixture is more than 5% lean. If the RED LED stays off, the mixture is more than 5% rich. If the RED LED blinks simultaneously with the GREEN LED, the air/fuel mixture is cycling properly. Run the engine above 2000 RPM under no load while looking at the ECU. After the LED flashes twice, turn the dial fully counter clockwise (or turn the switch off).Ĥ. Turn the dial on the ECU fully clockwise (or if you have a switch, turn it on).ģ. Warm the engine to normal operating temperature.Ģ. Use Mode II to determine if the air/fuel mixture is cycling correctly.ġ. If the LED does not flash, check the sensor's circuit. If the number of flashes are not more than five, replace the oxygen sensor. Make sure the GREEN LED goes on and off more than five times during ten seconds at 2000 RPM. Run the engine above 2000 RPM under no load while looking at the ECU.ģ. Use Mode I to determine if the Oxygen Sensor is functioning properly.ġ. I will be performing these tests during day light, but first to find the ECU.yes yes i dont know where it is. Seeing as quiet few people having problems now with the U13 running rich.(like mine) Hmm stole this from another site, but thought might come in handy here. ![]()
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