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Re: '89 S10 4.3 erratic idle speed
The 12-pin ALDL connector on my '89 S10 4.3 only has pins in A, B, C, E, F and H. Search for pictures found many different pinouts, did not see any that match mine.
Are the following pinout mappings correct for my truck? Note that D, I, J, K and L are missing from list, and there is an "M"!:
A - Ground
B - Test Terminal
C - Air Injection
E - Serial Data
F - TCC
G - Fuel Pump
H - Brake Sense Speed Input
M - Serial Data
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