Will not fully seated Memory Clibration module always... - ZR-1 Net Registry Forums

Schrade · 07-10-2013

... light up more than 1 DTC code?

I got a 42 4 module H. I cleared it, started diags running for a couple minutes, and it didn't light up again (I hate problems that go away by themselves).

FSM says first 'Intermittent' is to check MEM-Cal module for seating.

If it's not seated, won't it cause ALWAYS at least SEVERAL DTC's, instead of just one??

XfireZ51 · 07-10-2013

If you put it into DIAG mode, it should just give you 1 + 2 flashes, 3 times, then repeat. Have you looked at the prom? The blue and white levers on each end should be locked in. Is your MALF code for the ECM or CCM?

Schrade · 07-10-2013

Haven't started digging yet there Darryl; waiting to see if the code lights up again here...

Diagnostic mode LCD showed proper when reading, and when cleared.

Loose ground somewhere probably - haven't checked any system ground connections either. LCD flickers occasionally too.

Still trying to de-compile the automatic install, and get it zipped up.

XfireZ51 · 07-10-2013

Sounds like a CCM issue

Schrade · 07-10-2013

Quote:

Originally Posted by XfireZ51

Sounds like a CCM issue

Funny that you say that there Sir; also saw when I bought it last year, a module 1 CCM H72, which I believe is voltage deviation...........

32k car shouldn't have grounds problem otherwise.

Corrosion in some grounds I'm sure; previous owner had the headlight motor short, which was draining the battery. He also had mounted an onboard trickle charger for this. Fumes HAD to be involved.

XfireZ51 · 07-10-2013

Those are CCM codes, not ECM.

Schrade · 07-13-2013

Quote:

Originally Posted by XfireZ51

Those are CCM codes, not ECM.

The module 4 H42 is ECM I think...

XfireZ51 · 07-13-2013

Quote:

Originally Posted by Schrade

The module 4 H42 is ECM I think...

You don't read ECM codes on the speedo display. You read them by counting the flashes of the SES light on the DIC.

Schrade · 07-13-2013

Quote:

Originally Posted by XfireZ51

You don't read ECM codes on the speedo display. You read them by counting the flashes of the SES light on the DIC.

That's how my '87 was, but this one ('90) isn't flashing???

ed.:
OK - I'm thoroughly confused now.

So I plugged in the clip again. Am I puttin' tunnel vision on the LCD, and missing the SES flash? Nope.

I'm lost.

2nd ed.:
My '90 FSM says module 4 is for ECM.
And it's displaying in the LCD???

Schrade · 07-14-2013

Quote:

Originally Posted by Schrade

That's how my '87 was, but this one ('90) isn't flashing???

ed.:
OK - I'm thoroughly confused now.

So I plugged in the clip again. Am I puttin' tunnel vision on the LCD, and missing the SES flash? Nope.

I'm lost.

2nd ed.:
My '90 FSM says module 4 is for ECM.
And it's displaying in the LCD???

bumpin' this one here...

Am I missing something here with Z package?

Is diagnostic readout different from base model L98 / LT1?

07-10-2013	#1
Schrade Join Date: Dec 2012 Location: NC Posts: 1,786	Will not fully seated Memory Clibration module always... ... light up more than 1 DTC code? I got a 42 4 module H. I cleared it, started diags running for a couple minutes, and it didn't light up again (I hate problems that go away by themselves). FSM says first 'Intermittent' is to check MEM-Cal module for seating. If it's not seated, won't it cause ALWAYS at least SEVERAL DTC's, instead of just one?? __________________ I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads... ( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b] Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc... 1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3" [IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG]

07-10-2013	#2
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,708	Re: Will not fully seated Memory Clibration module always... If you put it into DIAG mode, it should just give you 1 + 2 flashes, 3 times, then repeat. Have you looked at the prom? The blue and white levers on each end should be locked in. Is your MALF code for the ECM or CCM? __________________ [SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX

07-10-2013	#3
Schrade Join Date: Dec 2012 Location: NC Posts: 1,786	Re: Will not fully seated Memory Clibration module always... Haven't started digging yet there Darryl; waiting to see if the code lights up again here... Diagnostic mode LCD showed proper when reading, and when cleared. Loose ground somewhere probably - haven't checked any system ground connections either. LCD flickers occasionally too. Still trying to de-compile the automatic install, and get it zipped up. __________________ I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads... ( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b] Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc... 1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3" [IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG]

07-10-2013	#4
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,708	Re: Will not fully seated Memory Clibration module always... Sounds like a CCM issue __________________ [SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX

07-10-2013	#6
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,708	Re: Will not fully seated Memory Clibration module always... Those are CCM codes, not ECM. __________________ [SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX