CCM codes
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Joined: Aug 2007
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CCM codes
Hi all,
I'm still trying to track down my LCD dash problem.
Using the shop manual I deleated all the CCM codes to start from scratch. I drove the car an hour agan to get the speedo to scramble as it always does. I checked the codes again hoping to narrow the problem down. To my suprise even though the problem occured there was no faults recorded. I retrived the codes using the dash read out method as per the manual. Are there some codes that canonly be read with a seperate code reader or am I getting all the codes I'm going to get through the dash read out.
I'm still trying to track down my LCD dash problem.
Using the shop manual I deleated all the CCM codes to start from scratch. I drove the car an hour agan to get the speedo to scramble as it always does. I checked the codes again hoping to narrow the problem down. To my suprise even though the problem occured there was no faults recorded. I retrived the codes using the dash read out method as per the manual. Are there some codes that canonly be read with a seperate code reader or am I getting all the codes I'm going to get through the dash read out.
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Joined: Aug 2007
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RE: CCM codes
Charlie,
No luck yet![:@] I've replaced the ECM , had the speedo completely apart and inspected it for bad solder joints and resoldered many of the main joints, checked the main multi pin connector to the speedo for loose or broken wires with no luck. Now I'm looking towards the CCM under the dash for bad connections or maybe a bad CCM itself. The problem is that the CCM is deep under the dash and it's going to take alot of work to get to it. What you discribed about your speedo is identical to my problem. I'm affraid I'll have to replace or rebuild the speedo and or the CCM in order to solve the problem or worse replace the wire harness. I'l let you know if I find anything and hopefully vise versa.
No luck yet![:@] I've replaced the ECM , had the speedo completely apart and inspected it for bad solder joints and resoldered many of the main joints, checked the main multi pin connector to the speedo for loose or broken wires with no luck. Now I'm looking towards the CCM under the dash for bad connections or maybe a bad CCM itself. The problem is that the CCM is deep under the dash and it's going to take alot of work to get to it. What you discribed about your speedo is identical to my problem. I'm affraid I'll have to replace or rebuild the speedo and or the CCM in order to solve the problem or worse replace the wire harness. I'l let you know if I find anything and hopefully vise versa.
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Joined: Aug 2007
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RE: CCM codes
Charlie,
The CCM is the central control modual or body control mod. It is the main computer that controls most if not allthe dash electronics: speedo, AC, radio, air bags ect. It comunicates to everything and everything to it. I'm no expert, this is just what I've learned from the shop manual I bought, (a good investment)!! The manual seems to point towards a ground short between the speedo and the CCM but, it's all hard to get at and is going to take time and alot of pations I fear. If you say It's not the speedo and a short can not be found then Ecklers can rebuildCCM's for around $350 I think.[:@] By the way my vette is a 1990, what year is yours?
The CCM is the central control modual or body control mod. It is the main computer that controls most if not allthe dash electronics: speedo, AC, radio, air bags ect. It comunicates to everything and everything to it. I'm no expert, this is just what I've learned from the shop manual I bought, (a good investment)!! The manual seems to point towards a ground short between the speedo and the CCM but, it's all hard to get at and is going to take time and alot of pations I fear. If you say It's not the speedo and a short can not be found then Ecklers can rebuildCCM's for around $350 I think.[:@] By the way my vette is a 1990, what year is yours?
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Joined: Aug 2007
Posts: 37
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RE: CCM codes
Charlie,
I bought my manual from www.helminc.com fot about $125. It's worth every penny! It's the same manual that the dealers have and it's big! Diagrams, instructions, specs, service bulitins, and trouble shooting help. It's not to bad to understand for the most part and sure answered alot of questions for me. It's a great help to locate most things in the car.
I bought my manual from www.helminc.com fot about $125. It's worth every penny! It's the same manual that the dealers have and it's big! Diagrams, instructions, specs, service bulitins, and trouble shooting help. It's not to bad to understand for the most part and sure answered alot of questions for me. It's a great help to locate most things in the car.
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