Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Heating and Ventilation Controls Multi-Pin Connector Assignments



Heating And Ventilation Controls Multi-Pin Connector Assignments

Special tools, testers and auxiliary items required
- Connector test set VAG 1594 C

16-pin electrical connection is not assigned.







5-pin electrical connection -T5-
1 - 3rd blower speed
2 - 2nd blower speed
3 - 1st blower speed
4 - 4th blower speed
5 - Terminal X







20-pin electrical connection -T20c-
3 - Fresh/Recirculating Air Door Motor V154
6 - Fresh/Recirculating Air Door Motor V154
7 - Auxiliary Air Heater Control Module J604
8 - Rear window
11 - Drivers Heated Seat Control Module J131
15 - Front Passengers Heated Seat Control Module J132
16 - Terminal 75 seat heater (optional)
18 - Terminal 30
19 - Terminal 15
20 - Ground (GND) - Terminal 31