Post by Strangeleak on Oct 18, 2014 21:22:38 GMT -5
This is for both tests. One of them delivers codes when they key is turned on. The other delivers codes when the engine is on. The ECU will rev the engine to about 3000 for 30 seconds or so then idle down and begin flashing codes. The analog meter is used to see the "flashes". You can also watch the check engine light for codes.