Install EPROM. Won't start, just clicks.

[UofACATS]

Installed a socketed EPROM ECU. Turning the key to "ACC" results in a rapid clicking from under the hood. The vehicle turns over, but won't start.

Re-installed the original ECU and it starts fine.

Visually, my electronically untrained eye detects no defects on the ECU, although I could easily be mistaken.

Anyone want to take a shot?

 

[Stanford]

Did you install the Eprom Chip backwards? Are the caps good on the new ECU?

 

[UofACATS]

Stanford, thanks for the reply. The EPROM orientation is something I had not considered. From memory, the writing faced the "outside" of the ecu, if that makes sense.

The ECU allegedly has new caps. I'll go check on the above........

 

[UofACATS]

The eprom chip faces the outside, or edge, of the ecu. Everything else seems to be very clean and in order. Any ideas?

 

[Nick 4g63]

sounds stupid...but was the EPROM programmed properly?

 

[97_eclipse_gst]

Just to make sure is the eprom from a 95 dsm, or earlier?

 

[faracon]

Since you have a 95 you would have to get an EPROM from a 95 DSM. Anything earlier won't work.

 

[2gGSX]

If you put it in backwards (note the notch orientation) then the chip is fried. Regardless, the clicking is caused by a relay constantly firing which (in my case) was caused by a shop socketing the ECU incorrectly.

I e-mailed Dave from DSMLink about it and he sent me a new chip free of charge, as well as repaired my ECU. In total it came out to something really fair, like below 50 with quick shipping.

 

[steve]

The notch on the chip marks the end with pin one. It should be on the inside edge just like what is printed on the board.

Steve

 

[UofACATS]

Thanks for the responses.
The EPROM is not "programed." I have yet to purchase DSMLINK.

The seller said "new caps, and socketed." If it's socketed incorrectly, is the ecu fixable?

If the chip is fried, then the DSMLINK will provide me with a new chip correct?

2G-GSX. Is it the relay right next to the brake fluid resovior? Also, thanks for the dsmlink info, if they repared your ecu from incorrect socketing, then they might be able do the same for me.

 

[lasertim]

Hey UofACATS, talk to the wiseman that posted before you, he may be able to help you out.

 

[steve]

The EPROM is not "programed." I have yet to purchase DSMLINK.

The seller said "new caps, and socketed." If it's socketed incorrectly, is the ecu fixable?

If the chip is fried, then the DSMLINK will provide me with a new chip correct?

How can the ECU not be programmed. That's that the EPROM chip does. It's the ECU software. So you either have a stock EPROM chip, some third party EPROM like a DSMchips or DSNlink EPROM or an empty socket. The empty socket sin't going to boot and a chip installed backwards isn't going to either.

Depending on what shape the ECU is in it should be repairable but I've received a couple that were so badly done they blew other parts of the ECU and trashed the whole thing.

Steve

 

[UofACATS]

Thanks, Steve. I am "electronically untrained." What I meant by not programmed is that I have a stock EPROM chip.

I've emailed the problem to dsmlink.

Thanks for the replies.

 

[2gGSX]

The stock EPROM chip still has to be oriented correctly. If the ECU is damaged from the socketing it should be able to be fixed. Like I said, the people at DSMLink will definitely be able to fix it for you, although a local shop may be able to as well.