1992 corvette ccm Nov 25, 2005 · My friend and I had a so called CCM problem on his 92 LT1, or at least that's what the GM service manuals were pointing to, for a code 41. The convertible returned, as did higher performance engines, exemplified by the 375 hp (280 kW) LT5 found in the ZR1. So if the Cluster is getting speed, signal was sent from the VSS to the ECM, and the ECM then sent it on to the CCM. I got a complete engine and underdash harness from a 1990 vette part out. 1. Come join the discussion about performance, modifications, racing, restoration, classifieds, troubleshooting, maintenance, and more! Corvetteforum. I think it's the CCM. The LT1 engine was introduced as the base engine for Corvette. This is an indication of a CCM problem or perhaps a bad connection between the CCM and ECM. The grounds for both is located right above the oil filter and next to the digital oil temp sending unit on the side of the block. Inspect the receiver antenna near the door or dash for damage or loose wiring. CCM Service Part# 16159188. You will be mailed a piggyback adapter that plugs in between your stock chip and stock computer. GM discontinued the part at this time. Below, you will find the Factory Original CHEVROLET CORVETTE 1992 Service Repair and Owner’s Manual for this vehicle. This enigmatic element, akin to the cerebral cortex of a sophisticated machine, holds the key to unlocking the potential of Aug 29, 2011 · CorvetteForum - Chevrolet Corvette Forum Discussion C4 Corvettes, 1984 - 1996 C4 Tech/Performance 1992 BCM, removed the radio, still dont see it C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine Aug 8, 2019 · My 1992 Corvette (garage kept) wasn’t started for about 3 months. The factory service manual says if CCM replacement is need call the techincal hotline??? I know it has to be programmed, can someone give step by step directions via a tech1a or Tech2. CCM's are no longer built and GM does not offer for sale any longer, so I purchased a used one off of ebay, knowing I would have to get it reprogrammed Jan 25, 2002 · C4 Tech/Performance - Help: CCM code H72 please - While clearing an ECM code 45 I found that my CCM had a code H72 stored. 6 volts, clutch wire was ok, tried booster cables, didn't work, tried a push start but it would catch then die. Aug 20, 2008 · You're still mistaken, Blade1. If experiencing drivability problems, inspect the CCM for corrosion or damaged wiring harnesses. May 28, 2021 · The CCM (Central Control Module) on the 90-96 Corvette has zero control over emissions. I bought a service manual on CD but it is not Having trouble with your 1990-1993 Corvette's ECM? Let our quality professionals restore it back to factory condition. Corvette Parts Home Interior Console Product Information 1992 - 1993 Corvette May 31, 2024 · This guide is designed to help you understand the VATS Key and determine which resistance value your Corvette's Body Control Module will respond to. Instructions included. It provides a comprehensive overview of the electrical system and its components, allowing owners to better understand and troubleshoot their cars. 33: data clock circuit shorted to B+ or CCM internal open. I In this video i show you guys how you can repair your ECM for a C4 Corvette. I called the part store and he acted like i didnt know what the hell i was talking Mar 13, 2004 · C4 Tech/Performance - 1992 ecm/bcm - having major troubles with 1992 corvette, wont start, not the chip on key mechanic thought it was ecm, replaced that wasnt that! now trying the bcm which is real rare for these to go, lookslike the ecm but behind the stereo. Spark verified to coil and Corvetteforum. Jun 26, 2005 · Any source available to rebuild a Central Control Module (CCM) for a 1992 corvette. , DIC, LH Power Window, LH Map Light (Door) 6 - 10 Amp Accessory Dec 26, 2024 · With the Tech 2 you can monitor via the OBD-1 connection various engine parameters, test the ABS, connect to CCM, check the fault codes (DTCs), etc. Today I was about 2 hours from home on a car club event and when I went to start my car there was nothing at all. Is this something I could possibly analyze myself and what would be the The 1992 Corvette’s passive key entry relies on proximity sensors and a receiver module. Jun 7, 2009 · C4 Tech/Performance - HELP - Serial Data 1 and 2 Tan 800 wires - Would someone out there know where all the 800 serial data lines connect and how? I know before going into the CCM the ECM, ABS and Air Bag Computers 800 Data lines all meet in the harness under the dash. finally located bcm from dealership, but the real problem Jun 25, 2021 · C4 Tech/Performance - 92 ECM Rebuild/Repair Service Choice - Hi everyone, I own a 1992 chevy corvette LT1 automatic base model coupe. did a few things and then came back to the car to restart and take it Nov 17, 2015 · C4 Tech/Performance - 1992 C41 ecm serial data loss of communications- diagnosis and questions - hi guys. I need to get my ECM rebuilt/repaired as their is no way to get a new or remanufactured ECM anymore. May 1, 2004 · The CCM accepts vehicle speed input (817) from the ECM, and sends the VSS info back out to the cluster, using the same 817 CKT, WC2 (. The first LT1 was put in the 1992 Corvette. From 1990 through 1993, you shorted ALDL pin "G" to "A" and turned the ignition to "On" without starting the engine. 7 (VIN J) On left side of engine compartment, in front Chevrolet Corvette 1992 – ELECTRICAL COMPONENT Jul 10, 2004 · C4 Tech/Performance - CCM code 41. Position A is at the top right corner and position G is at the lower left of the ALDL. In addition, ABS/ASR (Anti-lock Brake System/Acceleration Slip Apr 13, 2010 · A document that provides guidance on reading CCM codes for the 1992 and 1993 General Motors vehicles. Jul 31, 2009 · C4 General Discussion - 1992 Corvette C4 Body Control Module (BCM) - Hello all, I am looking for a place where I can purchase a Body Control Module (BCM) for a 1992 C4 Corvette. replaced it and everything was fine. Jul 28, 2012 · C4 Tech/Performance - 1992 "Service Engine Soon" - Got a short duration Service Engine Soon light on the way home from work last Monday. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Need to service your CHEVROLET CORVETTE 1992? You’ve found the right place. There is fuel verified to the rail @ 43psi. 2. No Start/Crank problem on his 92. Sep 14, 2012 · Per the FSM on CCM code 41, have determined the serial data line (CKT 800) has a short to ground. Code #15: Coolant Temperature Sensor Circuit Low. If they appear to be Differences between the C4 Corvette years Between 1984 and the end of the 1993 model year, the ALDL connector used 12 pins. I've bypassed the Starter Enable relay but need to fake a Fuel Enable signal from CCM to the ECM. ECM Resetting is a 3 step process. Oct 13, 2010 · 1992 corvette no comunication between modules replaced ccm with rebuilt ecm checked out good replaced key and - Chevrolet 1992 Corvette question ECM RESETING - THE PROPER PROCEDURE AFTER DISCONNECTING BATTERY AND RECONNECTING FOR THE 1992 - 1993 C4 LT1 ODB1 Engine. When the 1990 Corvette debuted, GM introduced ECM (Engine Control Module) and CCM (Central Control Module) trouble codes. 1992-1993 LT1 were mated with 700R4's. The information was obtain by using AI Open Chat. May 18, 2015 · Help locating a CCM module? - ZR-1 Net Registry Forums Page 1 of 3 1 2 3 > Jul 28, 2014 · Overview: The 1990 to 1996 Corvettes are equipped with an Engine Oil Life Monitor. This never happened before. Faulty sensors can cause intermittent locking issues. Pulling Codes on your Corvette without a code reader 1981-Present OBD I & OBD II ALDL 201 (OBD I) 1981 Corvette (L81) models have a very simple computerized ignition timing system. 1992 - 1993 Corvette Rebuild Service, electronic computer control module (ECM) LT1 Part Number: 211045 Repair Service: This is a repair service for your unit to be repaired. I brought my OTC Genysis with me. Planning on doing a vette 350 swap in my Jeep and am going over the wiring. To access it, remove the lower dash panel on the passenger side. It is used in 1990-1996 Corvettes to control everything within the body functions of the Corvette. So i went to the owners manual and it said it was the CCM. If the system fails, check the key fob battery first. com :: LT1 PCM Tuning for Dummies DynamicEFI diagnoseing TPI & LT1 problems Oct 17, 2017 · 1992 Code 74. 1992 stock Corvette automatic. May 23, 2006 · The CCM Central Control Mudule controls all of the lights, here is a brief explanation I found. Nov 2, 2009 · Hi Guys, Did a search on this but no luck as some ended with no solution or slightly different problem so any help will be GREATLY appreciated! The car will crank, but will not start. Dec 15, 2015 · Corvetteforum. • Code 74 came up. For persistent problems Jul 6, 2009 · A forum community dedicated to Chevy Corvette owners and enthusiasts. This action will cause the speedometer and trip odometer to become a troubleshooting aid: I have a 1991 Corvette. The document begins with an index of wiring diagrams spanning several years and types of electronic systems, providing an organized overview. Jul 22, 2020 · COOLING FAN Cooling Fan Wiring Diagram for Chevrolet Corvette 1992List of elements for Cooling Fan Wiring Diagram for Chevrolet Corvette 1992: (vin j) (vin p)A/c coolant fan switch (vin j) (right side of engine, on a/c high line)A/c pressure sensor (vin p) (left side of engine)Coolant temperature sensor (front of engine)Eletronic control All Sep 14, 2012 · Per the FSM on CCM code 41, have determined the serial data line (CKT 800) has a short to ground. Dec 26, 2015 · ALDL Fault Codes C4 ZR-1 Technical Postings I have a 1992 Corvette LT1. Also the C4 Corvette ZR1 (LT5 engine) is supported by the Tech 2. It supports C4 Corvette years from 1991 to 1996 (i. Corvette - pre 1996 Corvette - 1992 and 93 may or may not be compatible, before ordering confirm that your PCM/ECM has a VATS pin (AKA fuel enable or circuit 229) Send an email to Feb 7, 2018 · C4 Tech/Performance - 1992 corvette SYS and security light flashing - so iv pretty Much dialed down all my other issues and this is my last bit. The CCM is not easy to get out. Code #16: Opti-Spark Ignition Timing System. 92K May 8, 2025 · C4 General Discussion - Corvette No Start - Diag Mechanic said Bad ECM - Hey there, this is a follow up to the conclusion of my last post on swapping to a Holley Sniper EFI. Help - after buttoning everything up after installing a clutch master and slave cylinder my 91 started acting up. Jun 6, 2010 · A forum community dedicated to Chevy Corvette owners and enthusiasts. Jumped starter at sterter and turns over. In some of the first steps in diagnosing the problem, the CCM had to be taken out of its buried location which took quite awhile and a bunch of continuity tests had to be be run between the ECM, the This will be plug and play on 1992-1993 Corvettes with matching service # 16193458 just get your key cut on a VAT # 7 key and it will crank right up, just program if you need to correct your mileage. I have a 92 that will not crank, has no LCD readout or backlight, no courtesy lights, ASM, ABS, and Service Engine Soon lights on. Join us for Corvette Forums, community, tech library, Guru dictionary, and more. the check engine light came on and the sys would flash. The drive was uneventful and the car ran well. e. I wanted to make a post to see what you guys would suggest in terms of troubleshooting this no start situation before I rip the ECM out and send save: 16% Your Price: $ 485. Disconnect harness connectors from the CCM. 00 /each 1992-1993 Rebuild Service, electronic computer body control module (CCM/BCM) pn: 211046 msrp: $579. I was wondering if anyone knew what type of information the CCM is expecting from the ECM in order to talk to it. Unlock the Secrets: 92 Corvette ECM Pinout Revealed!In the intricate dance of automotive technology, there exists a crucial component that serves as the silent conductor orchestrating the symphony of mechanical movements and electronic signals within a vehicle’s engine. It’s advised to reset this system after each oil change, even if the oil change indicator light isn’t on. Regardless of whether or not the Change Oil indicator light illuminates, you should reset the Engine Oil Life Monitor after every oil change. Can some one tell me where i can find this CCM and is it a dealer only part. " But on the FAQ page: Here is just a small list of vehicles and years using the PASSkeyII VATS. When I tried to start it, it cranked fine, but the engine showed no signs of starting. It lays out the information necessary to correctly install and May 30, 2009 · C4 General Discussion - SYS flashing - I went to drive my car and the SYS was flashing on my dash. both OBD-1 and OBD-2). Previously I was getting the dreaded CCM codes C41, H72 and a bunch of strange problems: defogger will only occasionally work, instant fuel use would only work so often Jan 4, 2021 · C4_-_Wiring PDF An instructive document comprising a collection of wiring diagrams, schematics, and instructions specifically for Corvette vehicles from various model years. Once restarted, all functions and engine power were normal. does the opti spark have Jul 10, 2009 · Module "1" is still the CCM module. That system requires a more complex scan tool Aug 20, 2008 · You're still mistaken, Blade1. com shows you how to remove the 1990-1996 Corvette HVAC Programmer Module. ran the car for around 5 minutes and shut it off. Seemed Hi everyone this a Flashback of a video I did over a year ago and I thought is was time to show all of the new viewers to help them. Started up again immediately. I used a SPARK TESTER and the engine failed to show a spark. The CCM (Central Control Module) was added and a method was provided to display codes on the speedometer of the Corvette. Be aware there are two VATS systems in most GM cars; a starter interrupt and PCM Jul 29, 2016 · The 1992 Corvette ECM Wiring Diagram is an invaluable tool for any Corvette enthusiast. (1989 Bosch MAF installation shown at right). My SYS and security light are flashing. 7L. This is not a guarantee fix for everyone. Oct 24, 2004 · The CCM (Central Control Module) was added and a method was provided to display codes on the speedometer of the Corvette. CCM's are no longer built and GM does not offer for sale any longer, so I purchased a used one off of ebay, knowing I Jan 25, 2017 · The CCM (Central Control Module) controls the interior lights, security system and starter enable and normally does not give any problems but if you need to access it you will find the CCM for Sep 1, 2008 · I'm not sure if the 92 and older vettes have the CCM he is talking about. Contact SIA Electronics today at 800-737-0915 to get your 16159278 repaired. 1990-1994 Corvette Code Retrieval Procedures All ECM, CCM and ASR/EBTCM codes can be accessed by placing a jumper wire in ALDL position G and A. 00 We would like to show you a description here but the site won’t allow us. Additionally, you will find links for the Electrical Wiring Diagrams and Parts Catalog for the CHEVROLET CORVETTE 1992. ------------ Ragman1, check the ECM data cable connections to make sure they are tight and secure. It is only concerned with the serial data bus communications and controlling interior functions. Checked all fuses, all good. Jan 26, 2009 · C4 Tech/Performance - 92 Vette BCM? Where to get on or fix it? - Hello All, I have a 92 Vette that one day just didnt start. ECM's looking for a falling-edge signal some time Jan 26, 2009 · Corvetteforum. Get the best deals for 1992 Corvette Ecm at eBay. I'm tired of messing with it, so would like to put some kind of engine control system in to replace the stock ECM (part number 16159278) The fact, is, it is almost impossible to find 1992-1993 Corvette Factory BCM Body Control Module service #16193458 from a 1993 with 91,265 miles and the VAT # 7 in good working condition. Jan 26, 2009 · SYS flashing every 15 seconds means a fault code in the CCM (NOT the ECM nor the PCM). If | 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, anti, anti-theft, code, decode, decoder, harness, key, kit, meter, OHM, pellet Dec 11, 2022 · LINKS: Chevrolet Corvette 1992 – G TESTS W CODES 5 7L PFI 1992 ENGINE PERFORMANCE General Motors 5 7L Self Diagnostics ECM PCM – Wiring diagrams for cars C3-C4 Corvette EPROM & Memcal Chip Codes 1980-1995 | Codes | Dino's Corvette Salvage LT1howto. This action will cause the speedometer and trip odometer to become a troubleshooting aid: This 1992 Chevrolet Corvette PCM/ECM/ECU is a guaranteed replacement for all vehicles with a 5. From the beginning of the 1994 model year until the end of the 1995 model year, the OBD-1 system was used and the ALDL connector had 16 pins. . Apr 25, 2006 · C4 Tech/Performance - ECM/CCM connections - I was wondering if anyone had schematics for the ECM CCM and the connections between them for a 92 LT1 car? I have some troubleshooting that I need to do but I need a good understanding of the components and how they interact. May 30, 2008 · C4 Tech/Performance - How do I remove the CCM and DERM? - on my 1991 L98 Auto Coupe, have the console, upper dash trim, and right and left lower trim and knee panels all off, but still can't see how to get these out. Whether you’re maintaining your 4th generation Corvette or completing a full restoration, our selection of C4 Corvette Electrical Component parts is unsurpassed. Welcome, you are not logged in. how do i wake up the system. Sep 20, 2023 · My 92 C4 (stock) needs a new ECM. It runs good with no hesitation, misses, etc, but has been showing an occasional problem. - Electrical Component Location Chevrolet Corvette 1992 - BUZZERS, RELAYS & TIMERS Chevrolet Corvette 1992 BUZZERS, RELAYS & TIMERS LOCATION Component Location A/C Clutch Relay 5. Apr 29, 2004 · After turning IGN ON, the CCM displays malfunction codes and the module for which they apply in an automatic code display sequence. Code #13: Left Oxygen Sensor Circuit. Hell it didn't even crank. Page 8D-77 of the FSM outlines the Count on Zip Corvette for the best quality Corvette Parts available for your 1984-1996 Corvette. " DTC 72 in Module 9 (ABS/ASR DTC's) is a "Serial Data Link Malfunction" A loss of ECM data communication will also result in an "Err" under module 4 (ECM DTC's). My trip/ gas buttons don?t work either, is there a correlation with these? Iv looked up other forums but most of them say SYS and no Diskussionsforum für EFI-Systeme, Tuning und Fahrzeugtechnik. 7L engine size - Lifetime Warranty & Free shipping on every order. This is a C4 Body Control Module (BCM) Reprogramming Service which can be purchased to program a Corvette’s original mileage and vehicle identification number (VIN) to a previously purchased, used body control module. Stopped at a store and shortly after I pulled out of the parking lot the light came on and stayed on until I got home (10 Aug 11, 2012 · C4 Tech/Performance - Help diagnosing a code 41, 1992 m/coupe - Currently I can get the car to crank but not run. Module "4" is now called the PCM module (Powertrain Control Module) because automatic transmission computer control was added to Engine Control Module in 1994. It looks like (maybe?) the instrument panel bezel and cluster need to be removed? The center plastic May 7, 2018 · C4 Tech/Performance - Need help with CCM Reprogramming! - After 2 months of trying to determine what caused my 1996 LT4 interior lights/systems to just completely die, I diagnosed as a faulty CCM. Jul 30, 2014 · 1992 - 1996 Corvette: ABS/ASR Fault Codes and Parameters Estimated Reading Time: 2 Minutes 635 July 30, 2014 Brakes, Electrical and Ignition 1 9. Note that MAF based systems are far more accurate since they measure air flow directly whereas the MAP system infers air flow indirectly. Jul 23, 2019 · C4 Tech/Performance - CCM location 1992 - I did some troubleshooting now I suspect the CCM as the problem not ECM any idea where that could be on 1993 corvette? Nov 4, 2015 · The info below will walk you through the Corvette code display procedure. I'm tired of messing with it, so would like to put some kind of engine control system in to replace the stock ECM (part number 16159278) The fact, is, it is almost impossible to find Jul 4, 2020 · Fig. This will be plug and play on 1992-1993 Corvettes with matching service # 16193458 just get your key cut on a VAT # 7 key and it will crank right up, just program if you need to correct your mileage. The CCM (Climate Control Module) in a 1992 Corvette is located behind the dashboard, near the HVAC unit. Well after working on it for some time I have come down to the BCM (Also called CCM or Body Control Module) isn't providing a ground to the starter relay. i have replaced the ccm with a rebuilt unit now there is no communications all modules no response everything seems to work such as interior lights outside lights dash lights gauges but starter and injectors no work replaced keys and ignition set but cant get vats code from ccm . Our inventory selection includes remanufactured ECMs and prom chips, along with flash programming and a ECM/PCM remanufacture service Corvetteforum. Dec 13, 2008 · C4 Tech/Performance - 92 C4 No Start Possible CCM Problem - Went to help a friend today. Code #14: Coolant Temperature Sensor Circuit High. I decided the common C4 Corvette Body Control Module 1990, 1991, 1992, 1993, 1994, 1995, 1996 This part is a good, used C4 Body Control Module (BCM) which can be installed on any of the Aug 19, 2008 · C4 General Discussion - Central Control Module help - i have a 93 that went into a local speed shop, who are pretty good guys, for a bad coil and coil module. I was able to borrow a copy of the factory service manual. This 1992 Chevrolet Corvette PCM/ECM/ECU is a guaranteed replacement for all vehicles with a 5. There is very little diagnostic information available with these cars. Left side of dash does not light up, neither does odometer (no security light). Inspect connectors for corrosion or loose pins. Part Number: 16159188 C4 Corvette 1992-1993 Body Control Module BCM 88999216, 16193458 | Corvette Recycling - OEM Used Corvette Parts Sep 23, 2013 · Description Supports 1986-1993 Corvette and 1989-1993 TPI V8 Fbody*! Need a chip to bypass the VATS security in your 1986-1993 Corvette or 1989-1993 TPI V8 Fbody? We have a chip to do just that. Jan 15, 2012 · Hi Guys, Thought I would post this for fellow C4 owners who have had issues or are having issues with electrics going strange. For 92 Corvette ECM repair. If you're looking to repair or restore your vehicle, understanding the wiring diagram is essential. The Central Control Module (CCM) in a 1993 Corvette LT1 manages key systems like fuel injection, ignition timing, and emissions controls. Or maybe a source for a replacement unit. Come join the discussion about performance, modifications, racing, restoration, classifieds, troubleshooting, maintenance, and more! Detailed repair manual for the 1992 Chevrolet Corvette V8-350 5. Usually it signals a weak battery. The ECM for the 92-93 had a removable MEMCAL that housed the EPROM that stored calibration information. When the fourth generation Corvette was introduced in 1984, many innovative build techniques were implemented. I hope you enjoy!! Batee. Jan 22, 2011 · C4 Tech/Performance - CCM Code 25 (SYS Flashing) - Bought this beautiful 93 40th Ruby with 40,000mi and the first mod I couldn't wait to do was remove the sick sounding buzzer that would come on when I would open the door. Mar 27, 2009 · CorvetteForum - Chevrolet Corvette Forum Discussion C4 Corvettes, 1984 - 1996 C4 Tech/Performance Anyone ever remove the CCM from a C4? The following applies to recovering the OBD-I (On Board Diagnostics) codes on the 1984 through 1993 model C4 Corvettes via the 12 pin ALDL connector located under the dash just to the right of the steering column. It rolled off the assembly line on July 2, 1992 and is currently in the national Corvette Museum. Code #22: Throttle Position Sensor Jul 4, 2020 · Chevrolet Corvette 1992 - ELECTRICAL COMPONENT LOCATOR 1992 ELECTRICAL COMPONENT LOCATIONS General Motors Corp. The CCM is the module that manages the security and can be found behind the center of the Instrument Panel Cluster. Early Corvette amenities were becoming standard equipment while new options filled Chevrolet Corvette (C4) 1984 C4 Corvette 1987 C4 Corvette rear The Chevrolet Corvette (C4) is the fourth generation of the Corvette sports car, produced by American automobile manufacturer Chevrolet from 1983 until 1996. Selling Unit: each ↓ Jump to Full Product Description msrp: $529. The ECM's have 4 square plugs, and the ECM case is black in color. With the 1994 model C4, they went back to the MAF system. 35: data strobe ciruit shorted to B+ 0r CCM intrnal open. The courtesy lights are set-up with a delay when entering or exiting the passen- ger compartment; The courtesy lights are also designed to turn off after ten May 21, 2004 · CorvetteForum - Chevrolet Corvette Forum Discussion C4 Corvettes, 1984 - 1996 C4 Tech/Performance Bypassing VATS Notices C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine Corvette - pre 1996 with some exceptions, before ordering confirm that your PCM/ECM has a VATS pin (AKA fuel enable or circuit 229) Camaro - pre 2003 Any GM F body - 1986 to 2002 Monte Carlo - pre 1999 CorvetteForum - Chevrolet Corvette Forum Discussion C4 Corvettes, 1984 - 1996 C4 Tech/Performance '92 won't start. Scanner got Oct 28, 2017 · CorvetteForum - Chevrolet Corvette Forum Discussion C4 Corvettes, 1984 - 1996 C4 Tech/Performance OFFICIAL CCM CODE 41 ERROR AND FIXES From Central Control Module Nov 3, 2015 · C4 Tech/Performance - Symptoms of a bad CCM in 91 C4 - i've been visiting this forum often for its plethora of knowledge, but finally have to ask my own question. I am getting a code 41 which is the EST circuit. guru is your independent Corvette resource. I have an open circuit between the Green CCM After 2 months of trying to determine what caused my 1996 LT4 interior lights/systems to just completely die, I diagnosed as a faulty CCM. It worked for Mar 15, 2025 · 1992 Corvette Wiring DiagramUnveiling the 1992 Corvette Wiring Diagram The 1992 Corvette has been sought after for decades, especially amongst car enthusiasts who appreciate the classic features and design of this iconic sports car. This system, controlled by the Engine Control Module, checks the oil’s condition by monitoring the engine’s speed and temperature over time. The CCm is MOD 1, the ECM, MOD 4. Thanks. This product fits the following Corvette model years: The 1990-1996 Corvette body control module is often referred to as the BCM or CCM. I have had the current one rebuilt, but now the rebuild has gone bad too. I've got "odo err" on my dash now where the mileage usually reads. GM does not carry them anymore, and I would like to purchase one new. The dash Jul 24, 2016 · C4 Tech/Performance - 92 LT1 ECM to CCM Issues - I recently purchased a 1992 LT1 coupe with 41,000 miles and drove it home from Michigan, about 240 miles. ChatGPT 1Q - What is the properly reset for the Engine Control Module (ECM) unit on a 1992 Corvette LT1… 90-96 Body Contr Module (bcm)rblt Ser Jun 8, 2019 · The exceptions are the 1984 Corvette that used a speed density system--a sort of predictive method of measurement---and the 1990 through 1993 C4 models which were also speed density based. 2: Chevrolet Corvette 1992 - Component Locations - Main Fuse Panel Identification (1991-92) Fuse & Circuit Breaker Identification - Auxiliary Fuse Holder 1 - 10 Amp Secondary Fuel Pump 2 - 15 Amp Horns/Theft 3 - 15 Amp Power Door Locks 4 - 10 Amp Crank Fuse For SIR 5 - 10 Amp LH Switch Pod, HVAC, LH Power Mirror, A/C Prog. The CCM on the 93-96 sits behind the radio and connects to the ECM that sits above the battery. Mar 26, 2006 · CorvetteForum - Chevrolet Corvette Forum Discussion C4 Corvettes, 1984 - 1996 C4 Tech/Performance c-41 ccm and ecm cant communicate Notices C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine Jul 19, 2024 · I bought a 1992 corvette a few weeks ago, just now have the time to work on it. Symptoms of a faulty CCM include erratic climate control operation or unresponsive controls. 37: M Clock circuit shorted to B+ or CCM internal open. Reason I ask is I would like to install a 1992 CCM in my vette to be able to use the different style LCD for the speedo and fuel. Cleaning contacts and ensuring proper alignment of components helps maintain functionality. it seems to be locked out. It includes sample diagrams for interpreting wiring schematics, detailed symbols The CCM (Central Control Module) was added and a method was provided to display codes on the speedometer of the Corvette. I went to start it and as stated, the security light blinks and the car does not crank when the key is turned. ( Low Pulse) Code #21: Throttle Position Sensor Circuit High. The CCM is also integrated with the security (VATS) system. Sep 23, 2013 · Description Supports 1986-1993 Corvette and 1989-1993 TPI V8 Fbody*! Need a chip to bypass the VATS security in your 1986-1993 Corvette or 1989-1993 TPI V8 Fbody? We have a chip to do just that. Jul 6, 2006 · Save yourself some trouble and clean the grounds for the CCM and ECM first before digging into the dash. If not, anyone know where I can purchase a reliable used one? Any input 16159278 ECM Repair Service. the previous owner The 1992 Chevrolet Corvette 1992 marked the production of the one millionth Corvette. Before this event the engine ran perfectly. DTC 41 in Module 1 (CCM DTC's) is actually "Loss of ECM Serial Data Communications. In the schematics there is a pass-key module. When I am driving down the road, occasionally,. That system requires a more complex scan tool Sep 29, 2009 · According to the web site, "This module will work for all PASSkeyII type engine computers made from 1986 to 2002. The '90-'96 Corvette courtesy lights are controlled by the CCM (cen- tral control module) located in the dash behind the radio receiver. It will start if it has been sitting for a while ( 1 hour or more). com. NE1 know what this means? Jul 7, 2007 · 31: LCD Data circuit shorted to B+ or CCM internal open. LED dimming output Circuit (Circuit open or shorted to ground) Two things just happened simultaneously on my 92; once at idle, and once while driving: • Lost all electrical power (including radio presets), and the engine died. Recently I got my 1990 all sorted (replacement ECM/PROM) after the car starting quitting randomly. Drove it again today and got another short duration light. Procedure: Aug 18, 2008 · My car always starts and works great. the previous owner Aug 23, 2013 · C4 Tech/Performance - Need location of the Central Control Module 92 - Could someone share with me the location of the Central Control Module on a 92 C4. Sep 17, 2013 · C4 General Discussion - Pass-Key/CCM in 1990 Wiring - Hey guys I am only a lurker on here because I am a Jeep owner. In 1994, Corvette went back to the MAF based system but used the speed density approach as a back up. Jan 21, 2011 · Codes, Codes, Codes… Have you noticed “SYS” intermittently showing up in your 1990-1996 Corvette’s speedometer display? This means there is a trouble code stored in one of the on-board control modules. Apr 19, 2006 · Corvette used this approach in the 1990 and 1991 L-98 engines and in the 1992 and 1993 LT-1 engines. Jul 6, 2009 · In this tech article CORVETTE FEVER takes a look at Weswood Performance's Digispark system which brings the ease of flash programming to L98-equipped C4 Corvettes and test it out on a 1991 Jan 29, 2005 · The CCM (Central Control Module) was added and a method was provided to display codes on the speedometer of the Corvette. It may or may not work. The Central Control Module (CCM) calculates the lifespan of the engine oil by measuring engine rpm, and oil temperature over time. 5 DK GRN/WHT). The battery was at 12. Please advise Jun 30, 2014 · C4 Tech/Performance - Security light flashing intermittantly - Corvette neophyte here in need of some help! I just bought a used 1992 Corvette with the LT-1 engine, 6 speed manual. I have disconnected ECM, EBCM, CCM, C68 and still have short to ground. It has gas and fuel pump is working. Jul 28, 2014 · 1992 - 1993 Corvette: ECM Codes Code #12: Normal No Codes. Then in 1993 the LT1 was introduced in the Camaro/Firebird. 00 save: 16% Oct 25, 2005 · CorvetteForum - Chevrolet Corvette Forum Discussion C4 Corvettes, 1984 - 1996 C4 Tech/Performance Which is failing? ECM or CCM? Customer: 1992 lt1 corvette 6spd. Sep 22, 2009 · C4 Tech/Performance - Bypassing CCM to Enable Starting - My CCM is acting up and I don't want to get stuck somewhere with a no start situation while I'm trying to fix it. you can erease the history codes easly just enter the diagnosic mode as if you want to pull some codes. The 1996 model year had the 16-pin ALDL connectors but used the new OBD-II system. This new engine produces 300 horserpower and 330 lb-ft of torque. That's right, it only took us 20 years to get around to shooting this video Jan 30, 2024 · Corvette models from 1990 to 1996 have a system that tracks engine oil life. The GM shop manual is recommended for this vehicle. Jan 1, 2006 · Replacing CCM how to program? I am replacing a CCM in a members 95 Corvette die to a intermittant no crank condition (diagnostics complete its the CCM). On the CCM there are 2 connectors (C1, C2).