Test Mode 1

DIAGNOSTIC TEST MODE I (Oxygen sensor monitor)
This mode checks the heated oxygen sensor for proper functioning. The operation of the ECM LED in this mode differs with mixture ratio control conditions as shown in image.




*: Maintains conditions just before switching to open loop

HEATED OXYGEN SENSOR FUNCTION CHECK
If the number of LED blinks is less than that specified, replace the heated oxygen sensor.
If the LED does not blink, check heated oxygen sensor circuit.