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#11 |
![]() ![]() Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,791
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Existing ALDL Code Reader for 90'-93'.........................ALDL Code Reader used with Adapter for 94'-95'
![]() ![]() For the 16 Pin ALDL....... Ground is Pin 4 Ground to Pin 6 is ECM Ground to Pin 8 is PKE (Alarm System) Ground to Pin 12 is CCM Ground to Pin 3 is SRC So....in the adapter if I Connect the 16 Pin end to the 12 Pin end as follows: 16 Pin (94'-95')......12 Pin (90'-93') Connect Pin 4 to.... Pin A Connect Pin 12 to.. Pin G (White Button) Connect Pin 8 to.... Pin H (Black Button) Connect Pin 3 to.... Pin C (Yellow Button) Connect Pin 6 to.... Pin B (Green Button) ![]() ![]()
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Left Clickable links ![]() -Solutions- LT5 Modifications/Rebuild Tricks Low Mileage ZR-1 Restoration 1990 Corvette (L98) Modifications LT5 Eliminated Systems LT5 Added Systems LT5/ZR-1 Fluids 1995 LT5 SPECIFIC TOP END REBUILD TRICKS Last edited by Dynomite; 07-25-2018 at 09:47 PM. |
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#12 |
![]() Join Date: Jul 2019
Location: Chicagoland
Posts: 12
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Can someone recommend a scan tool that works with ALDL/OBD1? I've seen the adapters that go from 12 pin to 16 pin but they have horrible reviews.
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1991 Corvette ZR-1 - Polo Green/Saddle 2010 Mustang GT Convertible 2003 Thunderbird 1973 International Scout 1967 Pontiac GTO 1965 Mustang Convertible 1958 Plymouth Belvedere Convertible 1957 Ford Thunderbird Last edited by carguyjoe; 08-28-2019 at 06:02 PM. |
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#13 | |
![]() Join Date: Apr 2018
Location: New Jersey
Posts: 29
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If you want access to all the OBD1 scan features, try to track down a Tech 1 or Tech 1A scan tool and appropriate cartridges on eBay. I can send a list of useful Tech 1 cartridges if you are interested in exploring this route. Sent from my iPhone using ZR-1 Net Registry |
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#14 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,697
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Are u looking to simply determine what MALF codes u have or trying to datalog ALDL datastream?
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[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 |
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#15 |
![]() Join Date: Jul 2019
Location: Chicagoland
Posts: 12
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Currently I don't have any idiot lights on, so I guess I wanted to look back at history, and be ready if anything goes wrong. I also have a Fox Body Mustang which I believe is also some form of OBD1, so I was looking for something that would get both cars. But now in looking I can see it gets expensive with all the adapters.
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1991 Corvette ZR-1 - Polo Green/Saddle 2010 Mustang GT Convertible 2003 Thunderbird 1973 International Scout 1967 Pontiac GTO 1965 Mustang Convertible 1958 Plymouth Belvedere Convertible 1957 Ford Thunderbird |
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#16 | |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,697
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[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 |
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#17 |
Join Date: Nov 2018
Location: Washington
Posts: 98
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The LT5 motor in my 67 Camaro flashes what I believe to be 66. Your list does not show a code 66 but doing further research I found information that says a code 66 represents a low or high power switch voltage. What does that mean? The valet key has been grounded to allow full power at all times. Any ideas?
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#18 | |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,697
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Is the power switch from a 90 or 91-95? There’s a difference. Was ur calibration modified for power switch being ON.
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[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 |
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#19 |
Join Date: Nov 2018
Location: Washington
Posts: 98
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Thank you for the response. My motor and computer are from a wrecked 91 ZR1. To the best of my knowledge, no recalibration has ever been done. The only engine modification is the installation of long tube headers. I removed the cover from the prom and found the following information: DELCO/AXFK/0277 and 060075.The instructions from the engine wiring harness kit said to simply ground the one terminal that would have otherwise run to the switch if full power all the time was desired. The motor starts fine, idles fine but is extremely rich. Any advice?
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#20 |
![]() Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,153
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Power key on a 1991 does not work by grounding the pin.. you need a 645 ohm resistor across the power key pins on the ECM. that will keep it in Full Power mode
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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