Informations on changes in the electrical system necessary to install the Climatronic air conditioning heater in place of the manual heater.
Previous parts:
- Swap Manual Climatic AC to Climatronic AC – part 1: comparison, theory
- Swap Manual Climatic AC to Climatronic AC – part 2: required parts
- Swap Manual Climatic AC to Climatronic AC – part 3: preparation for retrofit
Changes in wirings
| Pin no | wire color | assignment | where to connect |
|---|---|---|---|
| T16i/1 | – | ||
| T16i/2 | brown-white | sunlight sensor G107 | T4ai/2 (new wire, 0.35 mm2) |
| T16i/3 | green-white | sunlight sensor G107 | T4ai/3 (new wire, 0.35 mm2) |
| T16i/4 | black-green | N280 T2/1 | Old T16h/15 (green-black) |
| T16i/5 | orange-green | CAN conv hi | Old T16h/8 (orange-green) |
| T16i/6 | orange-brown | CAN conv lo | Old T16h/11 (orange-red) |
| T16i/7 | red-white | G65 T3/2 | Old T16h/1 (red-white) |
| T16i/8 | brown-green | Radiator control | Old T16h/3 (green-brown) |
| T16i/9 | brown-blue | Radiator control | Old T16h/6 (blue-brown) |
| T16i/10 | – | ||
| T16i/11 | – | ||
| T16i/12 | red | +12V Terminal 30a | Old T16h/16 (red/yellow or red/brown) |
| T16i/13 | brown | GND | Old T16h/13 (brown) |
| T16i/14 | black | fan controller | New wire to T6ag/6 (0.35 mm2) |
| T16i/15 | green | fan controller | New wire to T6ag/1 (0.35 mm2) |
| T16i/16 | blue | fan controller | New wire to T6ag/3 (0.35 mm2) |
Old T16h in Manual control unit: 6Q0937713 (6Q0 937 713)
Ventilator T6/4 → GND take appropriate thickness
Ventilator T6/2 → +75 SB40 take wire from old T5 connector, red and white
plus and a minus from T10c/T10z to the T6:
old T10: new T6:
T10/1 – red-black plus → T 6ag/2
T10/4 – brown minus → T 6ag/4
| old T10 | power supply | new T6 |
|---|---|---|
| T10/1 – red-black | plus | → T6ag/2 |
| T10/4 – brown | minus | → T6ag/4 |
There will be two wires in T10c, a brown one and a red-black one, but they connect to the and the resistor I believe, or the AC panel – you’ll need to connect them to new T6.
Remove wires from old -T10c- connector
Here is where the connection to the T10c was before:
1J0972785 (1J0 972 785) – old T10c (with male terminals)old T10c (with female terminals):
1J0972775 (1J0 972 775) – old T10c
Add plus & minus wires from old T10c to new T6ag connector
I bought some cables from Michel from the original Polo 6R wiring harness, so I used the same colored wires to connect the new T6ag.
You can use here any connectors, or just solder cables.
Just like Michel, who previously also changed the manual air conditioning to Climatronic I cut off the wires from old T10c permanently and led them to T6 of the heater resistor (behind passenger airbag):
I used butt connectors to connect directly old wires (from T10c) to new wires (to T6ag)
Add wires from new T6ag to new T16i
Add wires to G109 (T4ai)
Add wires to G107 – sunlight penetration photosensor – which is necessary in Climatronic.
6R0907539 (6R0 907 539)Note that the sun sensor is located in the center of the dashboard, however the wire needs to be slightly longer to allow the sensor to be pulled out later.
I didn’t have enough green and brown cables so I used different colors (black and yellow) to extend the beam for sunlight penetration photosensor
A different color is not a problem as long as you connect them properly 😉
Connect wires to new T16i:
443972807 (443 972 807)T16i’s terminals are specific, and I didn’t have pins to this connector, so I used parts of repair harnesses which i bought from my mate.
Now put new connectors to climatronic panel to test if all works. Don’t turn on AC until you don’t have r134a….
If panel and all motors works tape your wiring harness and put the refrigerant R134a.
Next part:
