Engine Running Test Codes Description: Notes

Connect diagnostic read-out box to diagnostic connector. Make sure "READ/HOLD" button is in "READ" position. Start engine and observe diagnostic read-out box display. When the engine is running, O2 switching is displayed, and the "READ/HOLD" button is in "READ" position, depress and hold the "ATM" button until the desired engine running test code is displayed. Release "ATM" button. Move "READ/HOLD" button to the "HOLD" position.