Aircon Component Diagrams - Chapter 12

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BXTASY
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My Cars: 1988 BX 1.9 GTI
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Aircon Component Diagrams - Chapter 12

Post by BXTASY » Tue Oct 06, 2015 8:30 pm

1988 1.9 GTI with aircon - I recently downloaded parts of the BX Service Manual, and happy to find Chapter 12 on air conditioning - two pages of component locations on the car, and one circuit diagram. Can’t find the names of some of the numbered components - some are not in the wiring diagrams’ “Key to Diagram 6” for cars from ’87.

What are #
60 (probably aircon control module?)
95 (near fuse box, not shown on wiring diagram)
270 (heater temp control knob, shown as a switch but isn’t it a potentiometer?)
620 and 621 (recirculation flap motors?)
345 (resistor from 762 relay)
837 (potentiometer?)
Relays: (for what?)
733
742 (compressor relay?)
772 (r.h. engine fan relay?)
773 (switch after the l.h. engine fan relay)

I’ve deciphered most of the component symbols, but where can I find an overall Key to these? Not found in Haynes, Revue Technique, or any other documentation I’ve come across.

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Jaba
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Re: Aircon Component Diagrams - Chapter 12

Post by Jaba » Tue Oct 06, 2015 11:18 pm

BXTASY wrote:1988 1.9 GTI with aircon - I recently downloaded parts of the BX Service Manual, and happy to find Chapter 12 on air conditioning - two pages of component locations on the car, and one circuit diagram. Can’t find the names of some of the numbered components - some are not in the wiring diagrams’ “Key to Diagram 6” for cars from ’87.

What are #
60 (probably aircon control module?)
Aircon control unit/relay
95 (near fuse box, not shown on wiring diagram)
Main junction and fuse box
270 (heater temp control knob, shown as a switch but isn’t it a potentiometer?)
Microswitch on heater knob enabling maximum vent fans speed via relay 745
620 and 621 (recirculation flap motors?)
Yes
345 (resistor from 762 relay)
Fast idle solenoid
837 (potentiometer?)
Evaporator temp sensor
Relays: (for what?)
733
Cooling fan relay used when a/c is on
742 (compressor relay?)
Yes plus the fast idle valve
772 (r.h. engine fan relay?)
Think its actually the RH fan relay
773 (switch after the l.h. engine fan relay)
Relay for high speed twin cooling fan mode

I’ve deciphered most of the component symbols, but where can I find an overall Key to these? Not found in Haynes, Revue Technique, or any other documentation I’ve come across.
The Joy of BX with just one Citroën to my name now. Will I sing Bye Bye to my GTI or will it be Till death us do part.