Zr1 - different C68 programmer - Page 2 - ZR-1 Net Registry Forums

S.hafsmo · 02-14-2017

Appreciate the input, gentlemen.
All topics I've found on the subject, end with the programmer being replaced. Except this one, where he replaces the caps. This however, did not solve it in my case.
http://www.corvetteforum.com/forums/...-repaired.html

Wouldn't a faulty sensor give the appropriate fault code?

I'll keep my eyes open for a 90-91 programmer.

Edit,
Rod, did you also have those dashes? I'll have to check the flap as well, just in case.

RodB · 02-14-2017

The display did read - - - but I don't recall the fan running at full tilt but it could have been. I thought having the FSM would help me solve the problem but I couldn't find this exact problem addressed. I guess Gordon kept a few ideas for himself!

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S.hafsmo · 02-14-2017

Found this statement in the 8A supplement.
"Three dashes will be displayed on the Heater and A/C Control Head if the A/C Programmer fails." Not all to useful, but at least it also points to the programmer.

Edit: additional FSM info,

S.hafsmo · 02-15-2017

An other old thread with the same issue. I'm just collecting info here in this thread so I can find it when I get back home.

http://www.corvetteforum.com/forums/...cs-inside.html

mike100 · 02-15-2017

Quote:

Originally Posted by GOLDCYLON

... I think 90-91 are a break point then 92-93 and 94-96. So that's 3 different models. ...

I can confirm that my old 95 coupe had a different program as more selections ran with a/c rather than just vent air as my 91 does.

Marc Haibeck · 02-17-2017

For parts interchange I can add what has worked for me. A '91 or '92 or '93 ZR-1 Programmer will work if it is used with a '91 or '92 or '93 button panel. If an 08 sun sensor errors occurs, cover the sensor with tape.

S.hafsmo · 02-17-2017

If the 90 and 91s apparently are compatible, would that entail that a programmer from the model years you mention also could work on a '90?

I've gone through the FSM fault finding, and it just ends on "replace programmer". I've resoldered everything, measured all diodes, replaced all capacitors, and checked the board while live (connected/ign. On) with freezing spray to check for hotspots. Nothing. Getting close to giving up on this one.

Marc Haibeck · 02-18-2017

Yes, '91 to '93 Programmers should work on a '90. It may be necessary to use the matching model year button panel.

I tried fixing a '94 Programmer with capacitors and freeze spray, just like you. Sometimes it worked when the large IC chip was frozen. But it never worked at room temperature. BTW, the earlier Programmers will not work on a '94. I had to find a '94 Programmer to fix the '94.

02-14-2017	#11
S.hafsmo Join Date: Nov 2016 Location: Norway Posts: 397	Zr1 - different C68 programmer Appreciate the input, gentlemen. All topics I've found on the subject, end with the programmer being replaced. Except this one, where he replaces the caps. This however, did not solve it in my case. http://www.corvetteforum.com/forums/...-repaired.html Wouldn't a faulty sensor give the appropriate fault code? I'll keep my eyes open for a 90-91 programmer. Edit, Rod, did you also have those dashes? I'll have to check the flap as well, just in case. __________________ - '90 ZR-1 Last edited by S.hafsmo; 02-14-2017 at 12:52 PM.

02-14-2017	#12
RodB Join Date: Feb 2013 Location: Buckhannon, WV Posts: 46	Re: Zr1 - different C68 programmer The display did read - - - but I don't recall the fan running at full tilt but it could have been. I thought having the FSM would help me solve the problem but I couldn't find this exact problem addressed. I guess Gordon kept a few ideas for himself! Sent from my iPhone using ZR-1 Net Registry

02-14-2017	#13
S.hafsmo Join Date: Nov 2016 Location: Norway Posts: 397	Re: Zr1 - different C68 programmer Found this statement in the 8A supplement. "Three dashes will be displayed on the Heater and A/C Control Head if the A/C Programmer fails." Not all to useful, but at least it also points to the programmer. Edit: additional FSM info, __________________ - '90 ZR-1 Last edited by S.hafsmo; 02-14-2017 at 04:56 PM.

02-15-2017	#14
S.hafsmo Join Date: Nov 2016 Location: Norway Posts: 397	Re: Zr1 - different C68 programmer An other old thread with the same issue. I'm just collecting info here in this thread so I can find it when I get back home. http://www.corvetteforum.com/forums/...cs-inside.html __________________ - '90 ZR-1

02-17-2017	#16
Marc Haibeck Join Date: May 2007 Location: Addison IL Posts: 252	Re: Zr1 - different C68 programmer For parts interchange I can add what has worked for me. A '91 or '92 or '93 ZR-1 Programmer will work if it is used with a '91 or '92 or '93 button panel. If an 08 sun sensor errors occurs, cover the sensor with tape.

02-18-2017	#18
Marc Haibeck Join Date: May 2007 Location: Addison IL Posts: 252	Re: Zr1 - different C68 programmer Yes, '91 to '93 Programmers should work on a '90. It may be necessary to use the matching model year button panel. I tried fixing a '94 Programmer with capacitors and freeze spray, just like you. Sometimes it worked when the large IC chip was frozen. But it never worked at room temperature. BTW, the earlier Programmers will not work on a '94. I had to find a '94 Programmer to fix the '94.