Scan the PCM?
Thread Starter
2nd Gear
Joined: Sep 2004
Posts: 2
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Scan the PCM?
I have a 1995 Firebird Formula with the LT1 and OBDI. I bought a diagnostics cable and some software for my laptop so i can do some tuning. My friend has a 1985 Corvette with the L98 so i was wondering if i can scan and tune his car also? What kind of pcm does the 98 vette have and any other information pertaining to this subject would be much apprecaited! 
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
I use my AutoXray to scan both the '88 Vette and the '86 IROC, I just need to change the config by entering the year and requested code from the VIN. Also, you may need a different cable for his '85 ALDL. I believe your ALDL had the OBD-II pinout.
However, I have had trouble trying to setup and scan a copla '85 Vettes. It seems that the older ECM wasn't responding properly.
However, I have had trouble trying to setup and scan a copla '85 Vettes. It seems that the older ECM wasn't responding properly.
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
If you have the 12-pin ALDL, like the '85 Vette the pins will be:
F---E---D---C---B---A
G---H---J---K---L---M
A=ground
B=test
C=Air pump switch
D=Check engine light
E=Serial data
F=Torque Converter Clutch
G=Fuel Pump Test
H=unused
J=unused
K=unused
L=unused
M=serial data
Pin E is normally used for serial data out, but some applications may also use pin M.
Pins A&B are of course the ones we short together with a paper clip to flash the trouble codes.
F---E---D---C---B---A
G---H---J---K---L---M
A=ground
B=test
C=Air pump switch
D=Check engine light
E=Serial data
F=Torque Converter Clutch
G=Fuel Pump Test
H=unused
J=unused
K=unused
L=unused
M=serial data
Pin E is normally used for serial data out, but some applications may also use pin M.
Pins A&B are of course the ones we short together with a paper clip to flash the trouble codes.
