AEM 30-3903 Infinity Plug & Play Harnesses - Volkswagen 2002-2005 MKIV Golf/Jetta 1.8T - Manual (Page 4)

3903-MKIV 1.8T 4
© 2014 AEM Performance Electronics
**Important Infinity-8h Information
This plug and play adapter kit has specifically been designed to be used with the 30-7106 Infinity-6. While the 30-
7108 Infinity-8h can be used, it will result in the loss of Idle A/C Offset compensation and the additional digital
frequency input in the Aux connector. Pins C1-31 and C1-32 MUST be removed from the 80 pin connector if using
this adapter harness with an Infinity-8h. Also, the Infinity-8h does not have Peak & Hold injector drivers to run low
impedance fuel injectors. High impedance (saturated, high-z) fuel injectors MUST be used with the Infinity-8h.
Infinity
Pin
Infinity-6
Function
Infinity-8h
Function
VW 1.8T Adapter
Pin/Function
Infinity-6
Notes
Infinity-8h
Notes
C1-3 Low side6 Injector7 No Connect/Not Used Available LS output Available injector output
C1-4 Low side7 Injector8 No Connect/Not Used Available LS output Available injector output
C1-31 Digital6 Coil7 Aux 7/Freq Input Spare freq input in Aux
Loss of spare freq input, MUST remove
pin from Infinity 80 pin connector
C1-32 Digital7 Coil8 40/A/C Req Sw itch A/C Req sw itch input
Loss of A/C idle compensation, MUST
remove pin from Infinity 80 pin
connector
Infinity Connectors
The AEM Infinity EMS uses the MX123 Sealed Connection System from Molex. AEM strongly recommends that
users become familiar with the proper tools and procedures before attempting any modifications. The entire user
manual can be downloaded direct from Molex at:
http://www.molex.com/mx_upload/family//MX123UserManual.pdf