Aldl pinout
07-04-2017, 06:51 PM
#1
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Car: 92 Trans Am Conv
Engine: LB9
Transmission: T5
Axle/Gears: 3.08
Aldl pinout
I'm having trouble finding a pinout for the obd com port that makes sense.
92 5.0 TPI
F E D C B A
G H I J K L
A is ground.
B is diagnostic 5v
C is unknown
J is 5v <----------- WHAT is this for?
K is unknown
L is 8192 serial data
Others have no pins.
Can anybody fill in the blanks especially J. I want to know if I can power anything with J or why not.
92 5.0 TPI
F E D C B A
G H I J K L
A is ground.
B is diagnostic 5v
C is unknown
J is 5v <----------- WHAT is this for?
K is unknown
L is 8192 serial data
Others have no pins.
Can anybody fill in the blanks especially J. I want to know if I can power anything with J or why not.
07-05-2017, 09:48 AM
#2
Re: Aldl pinout
All I know is that if you have the wiring diagrams for the car, you can flip thru the pages relating to the EFI and transmission and look for the wires that terminate at the ALDL. I'd trust that further than any diagram found online, it'd just take a bit of studying to research.
07-07-2017, 03:31 PM
#3
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Car: check
Engine: check
Transmission: check
Re: Aldl pinout
Lower terminal letters didn't use I, looks too much like a 1.
A is ground.
B is diagnostic 5v.
C is unknown. Not sure what would be there.
F should have the TCC on it, pin F6 on the ECM, it also goes to the TCC solenoid.
K is 5v. Diagnostic request to DERM
L is unknown.
M is 8192 serial data. ALDL and DERM
Others have no pins.
RBob.
Code:
F E D C B A G H J K L M
B is diagnostic 5v.
C is unknown. Not sure what would be there.
F should have the TCC on it, pin F6 on the ECM, it also goes to the TCC solenoid.
K is 5v. Diagnostic request to DERM
L is unknown.
M is 8192 serial data. ALDL and DERM
Others have no pins.
RBob.
Last edited by RBob; 07-07-2017 at 03:34 PM. Reason: Added the TCC pin
07-08-2017, 11:10 AM
#4
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Join Date: Aug 2002
Location: ARIZONA
Posts: 948
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Car: 92 Trans Am Conv
Engine: LB9
Transmission: T5
Axle/Gears: 3.08
Re: Aldl pinout
Lower terminal letters didn't use I, looks too much like a 1.
A is ground.
B is diagnostic 5v.
C is unknown. Not sure what would be there.
F should have the TCC on it, pin F6 on the ECM, it also goes to the TCC solenoid.
K is 5v. Diagnostic request to DERM
L is unknown.
M is 8192 serial data. ALDL and DERM
Others have no pins.
RBob.
Code:
F E D C B A G H J K L M
B is diagnostic 5v.
C is unknown. Not sure what would be there.
F should have the TCC on it, pin F6 on the ECM, it also goes to the TCC solenoid.
K is 5v. Diagnostic request to DERM
L is unknown.
M is 8192 serial data. ALDL and DERM
Others have no pins.
RBob.
Interesting that there's still unknowns after 30 years!
