ECU question

[Papasmithnc]

I was looking at the instructions for reading the diagnostic codes for my 1994 J30. They are as follows.

1. Turn ignition On, but do not start engine.2. Using a small screwdriver, turn diagnostic mode selector switch, located on side of ECU, fully clockwise.3. Wait two seconds, then rotate switch to full counterclockwise position.4. A malfunction code can be read as the long (0.6 second) blink, indicating the first digit of a two digit number and the short (0.3 second) blink, indicating the second digit.

My question is in regard to the third step. How do I get to the diagnostic mode selector switch in step number 2?

I understand that the ECU is under the kick panel on the passenger side. However, I see no screw readily apparent. There is a cover that looks like it covers the guts of the ECU but a couple of the screws to take it off are hidden. Do I have to somehow take this cover off to get to the mode selector? From the description of the process, it sounded like this would be a piece of cake.

Thanks,Dave in NC

[gr8scott72]

I was looking at the instructions for reading the diagnostic codes for my 1994 J30. They are as follows.

1. Turn ignition On, but do not start engine.2. Using a small screwdriver, turn diagnostic mode selector switch, located on side of ECU, fully clockwise.3. Wait two seconds, then rotate switch to full counterclockwise position.4. A malfunction code can be read as the long (0.6 second) blink, indicating the first digit of a two digit number and the short (0.3 second) blink, indicating the second digit.

My question is in regard to the third step. How do I get to the diagnostic mode selector switch in step number 2?

I understand that the ECU is under the kick panel on the passenger side. However, I see no screw readily apparent. There is a cover that looks like it covers the guts of the ECU but a couple of the screws to take it off are hidden. Do I have to somehow take this cover off to get to the mode selector? From the description of the process, it sounded like this would be a piece of cake.

Thanks,Dave in NC

You have to remove the ecu before you can see the screw. Once you take it out, it will be obvious.

[xxcrashxx]

wow, dont feel bad, i was hoping thats what this thread was about.. i couldnt find that screw either, thnx to gr8scott72 i got a better idea now... lol

[yodawill2000]

Yup.The stuff you need is facing the front of the car on the ecu.Would have been nice if they mounted it on the side.