white connector X610 'A'
1-4 stepper motor fond area
5 heater sword
6 aux fan
7 rear window heater relais
8 climate control relais
10 NC
11 NC
12+F20 (30)
13+F20 (30)
14 - 17 stepper motors for air distribution (recirculation)
18 light switch LED
19 light switch LED
20 TXD
21 water valve left side
22 aux water pump relais K8
23 water valve right side
24 front window heating relais K8
25+F20 (30)
26+F20 (30)

Blue connector X613 "C"

Pins are in such way
13 up to 1
26 to 14

1= ground
2=ground
3= NC
4=temp feeler driver side
5= potentiometer blower motor
6= temp feeler in engine room
7=outer temo feeler
8= potentiometer temperatur driver side
9=NC
10+,11+, for stepper motors
12+F21 (15)
13+ F21 (15)
14= ground
15=ground
16= potentiometer+ feeler ground
17= potentiometer flappers
18 temp feeler left
19 starter (50)
20=potentiometer+feed
21 temp feeler inside
22 temp feeler reight side
23+ for stepper motors
24+for stepper motors
25+26 = F21 (15)
26+ F21 (15)


green X611 „B“
1 to pin 14,15,16
2,3,4,5 mixing flap motor left
6,7,8,9 fresh air stepper motor outside
10 NC
11 NC
12 NC
13 NC
14, 15,16 with pin 1 legroom stepper motor left
17, 18, 19, 20 defrost flap stepper motor
21, 22, 23 fresh air stepper motor left
25 NC
26 NC

yellow connector 614 „D“

1,2,3,4 legroom stepper motor right
5 MPX button
6 MPX button left
7 MPX defrost
8 MPX button right
9 speed signal
10 RDX
11 button rear window defogger/defroster
12 MPX button recirculation
13 MPX button aircon
14, 15, 16, 17 fresh air stepper motor right
18, 19, 20, 21 mixing flap stepper motor right
22 NC
23 NC
24 NC
25 NC
26 NC

The connectors are:
13 12 11 10 9 8 7 6 5 4 3 2 1
26 25 24 23 22 21 20 19 18 17 16 15 14

See the connectors, they are marked with small numbers outside



I have used the information from the German 7-Forum and translated it as good as I could, but case of in doubt, check the original German version
here

It also contains the pinout for HR, IHR and IHR built year 1987.
You may have to register on the German board to see the pinout link.

the SWORD has a 5 pin connector

Pin 1 connector for the potentiometer for speed regulation at the control panel.

Pin 2 power supply

Pin 3: the relay get's contact when the blower fan potentiometer is adjusted, 12 volts come on.

Pin 4 is ground

Pin 5 the cable/wire from the blower fan.

Remove the plastic covers from the sword and connect it again to the control panel.
Use a multimeter to test it.
When you turn the thumbwheel at the potentiometer, the voltage at pin 1 changes from 1.1 - 4.25 volts. As the transistor, which amplifies the potentiometer, only has a voltage (input) of 5 volts, that should be the full power of adjustment.

In case the blower fan only starts at let's say 3.5 volts then the pre-amplifier IC (I think it is IC LM 139) is defective. There are 2 pre-amps installed. Cost around 2 $ if you do it yourselves.

See my posting about sword repairs and heater control module pics I posted several times already.

E32 750iL 11/88, E32 750iL Highline 03/90
7 series Tech tips
http://tinyurl.com/3486c

• IHKA and sword pinout (pic) (url) - shogun 2007-10-16 22:43:43 (1309 views)
  • Re: IHKA and sword pinout - Hitmanx 2007-10-28 19:29:10 (103 views)
  • The defroster does not work well - Paparon 2007-10-16 23:47:29 (132 views)
    • did you resolder the IHKA module? - shogun 2007-10-17 00:02:56 (173 views)
      • Re: did you resolder the IHKA module? - Paparon 2007-10-17 00:45:30 (137 views)
        • Re: did you resolder the IHKA module? - webmasterz 2007-10-17 15:46:09 (120 views)
          • Changed the blower motor - webmasterz 2007-10-20 11:40:54 (130 views)
          • Re: did you resolder the IHKA module? - Paparon 2007-10-17 16:31:14 (129 views)
            • Re: did you resolder the IHKA module? - rick540 2007-10-17 17:42:21 (156 views)
              • hi,you didn't get a pic of switch,did you? - dr750 2007-10-21 08:40:30 (128 views)
              • Good info - Paparon 2007-10-17 18:53:11 (99 views)
                • Re: Good info - Paparon 2007-10-17 19:25:51 (113 views)
                  • So apparently it was the IHKA module, resolder old 1 (nt) - shogun 2007-10-17 20:57:09 (143 views)