In-Tech
12-07-2023, 11:20 AM
Hiya Folks,
I noticed 90 % of aftermarket wiring harness's don't have this built in :(
To me this is very important in tuning a swap car. There are many strategies that help with idle control. The ECM/PCM needs to know these so it can learn and repeat. It learns idle/park, idle/gear, idle AC/park, idle AC/gear, etc etc. This is for the P01/P59 but should work for many. If you want neutral safety and backup lights, you will also need to use the C2 connector AND you still need to connect C2 Ign power and ground. The PDF has the exact pinouts for the PRNDL switch as well as the PCM connections. When it is unhooked, the PCM/ECM thinks it is in D4 so the IAC or DBW chases itself making corrections instead of moving closer to a learned point instantly.
Enjoy https://pcmhacking.net/forums/images/smilies/icon_thumbup.gif
Mods, please move to an appropriate section.
I noticed 90 % of aftermarket wiring harness's don't have this built in :(
To me this is very important in tuning a swap car. There are many strategies that help with idle control. The ECM/PCM needs to know these so it can learn and repeat. It learns idle/park, idle/gear, idle AC/park, idle AC/gear, etc etc. This is for the P01/P59 but should work for many. If you want neutral safety and backup lights, you will also need to use the C2 connector AND you still need to connect C2 Ign power and ground. The PDF has the exact pinouts for the PRNDL switch as well as the PCM connections. When it is unhooked, the PCM/ECM thinks it is in D4 so the IAC or DBW chases itself making corrections instead of moving closer to a learned point instantly.
Enjoy https://pcmhacking.net/forums/images/smilies/icon_thumbup.gif
Mods, please move to an appropriate section.