Paul Baclace

My check engine light is on and I tried doing the self-test on the ECU, but nothing happens. I tried it many times, waiting 2 seconds before turning the screw back, engine warmed up or cold, etc. The check engine light just stays on steadily when the blinking is supposed to happen.

My Max is a GLE '95 California, so I suppose I should also be able to use an OBD-II reader, but I'm wondering how well that works with the 95-CA because it is not fully OBD-II compliant. Does anyone know what ODB-II functionality is missing from the 95-CA Max?

Paul Baclace

Perhaps my ecu is funky and cannot self-test. Has anyone ever seen this problem?

DAVE Sz

iTrader: (2)

Turn the screw clockwise til it stops, don't bother waiting, and turn it back til it stops again. The light SHOULD flash.

speedemn

iTrader: (14)

Does the screw stop and gets met with a bit of resistance when you turn it?

Paul Baclace

Thanks...I took the "don't turn past stop" line literally. The screw control needs to be turned a good 30-40 degrees past the line. I heard some relays click under the hood when it reached the max clockwise position.

(The label should say "don't force past the stop".)