Minimum Air Idle Adjustment - Page 3 - ZR-1 Net Registry Forums

tpepmeie · 07-30-2024

Quote:

Originally Posted by scorp508

One small note for any future people. I was having trouble with this procedure as I didn't use the correct ALDL pin combo on my 94 to extend the pintle. I needed to use pins 4 & 6 to use the Service Engine Soon light to flash. Only this combo fully extended the IAC pintle on my 94. The other ALDL pin combos for CCM on the digital dash or the flashing Service Ride Control light do not work to extend it.

I feel like I knew this at one time, but was this a model year change, regarding the ALDL pin combination for the IaC? If so, when did it change?

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XfireZ51 · 07-30-2024

Todd,

94 is when GM went to 16pin ALDL which would be used for OBDII cars. LT5 got it altho still OBD1

tpepmeie · 07-30-2024

Oh, nvm. I saw in the other post where you had been reading the ccm and ride control modules instead of the ECM codes. I recall the 95 has kind of a hybrid ALDL connector. OBD2 style, but the ECM is obviously OBD1 for the LT5.

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07-30-2024	#2
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: Minimum Air Idle Adjustment Todd, 94 is when GM went to 16pin ALDL which would be used for OBDII cars. LT5 got it altho still OBD1

07-30-2024	#3
tpepmeie Join Date: Aug 2005 Location: Fishers, IN Posts: 812	Re: Minimum Air Idle Adjustment Oh, nvm. I saw in the other post where you had been reading the ccm and ride control modules instead of the ECM codes. I recall the 95 has kind of a hybrid ALDL connector. OBD2 style, but the ECM is obviously OBD1 for the LT5. Sent from my iPhone using ZR-1 Net Registry