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Abuse · 11-17-2012, 10:48 PM

Ok, my check engine light is on on my 95 240 and I figured since no one does OBD 1 diagnostics I would just check the code myself. From what I have looked up is you turn the screw on the back of the ECU to diagnostic mode, put the key to the on position, then either the check engine light or the light on the back of the ECU flash the code pattern. Now I don't know if there is another step I'm missing but when I turn the screw to diag mode and turn the key to on, the check engine light turns off and the red LED on the ECU doesn't turn on or flash any solutions?

11-17-2012, 10:48 PM	#1
Abuse Join Date: Nov 2012 Location: Tucson Posts: 1 Trader Rating: (0)	ECU diagnostic issue Ok, my check engine light is on on my 95 240 and I figured since no one does OBD 1 diagnostics I would just check the code myself. From what I have looked up is you turn the screw on the back of the ECU to diagnostic mode, put the key to the on position, then either the check engine light or the light on the back of the ECU flash the code pattern. Now I don't know if there is another step I'm missing but when I turn the screw to diag mode and turn the key to on, the check engine light turns off and the red LED on the ECU doesn't turn on or flash any solutions?