Quote:
Originally Posted by Funracer
Can someone please explain in detail how to check this. I am checking both the O2 plug and pin 2 for .5 VDC? Both with O2 unplugged? I have the fuel pump jumpered should I leave it like that or put the relay back in. Start the engine and check inside the O2 plug for .5VDC? Or can I just go to run?
Sorry for all the questions. I’d love to take a class in automotive electronics.
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No, ... with everything at factory default plugged to the ECU, OX Relay etc, you just pull the o2 Sensor cable/socket from the plug in the rear left engine compartment.
Then you connect the DMM red connection to the contact of that (orange) plug, the other DMM connection to ground.
Start the engine or bridge the fuel pump relay in the fuse box at the front.
Both do provide current to the ECU. With the ECU powered, you read the DMM if it shows 0.5v.