Irishrover
Well-Known Member
- Posts
- 5,317
- Location
- La Trimouille, Vienne, France
Just found a RAVE CD. Read page 211 of the Electrical Manual and see subsequent pages for circuit breakdown.:behindsofa:
Thermostat how to alter?
- Thread starter kzrocky
- Start date
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kzrocky
Member
- Posts
- 52
- Location
- Melbourne, Australia
Thanks Irish, but Yep have read that but still no mention of Temp causing fans to turn on.
Excerpts:-
Condenser Fans
The HEVAC panel provides a signal normally at 12
volts for “off” condition and 0 volts for the “on”
condition, which in the case of petrol vehicles is fed
into the ECM and diesel vehicles directly onto the
coil of relay 18. In line is the Air–Conditioning
pressure switch 2, which turns the fans on/off.
When relay 18 is energised, it provides connection
between relays 13 and 14 (fan 1 and 2) in series or
parallel with each other. This is dependent upon the
state of the air–conditioning pressure switch 1.
For the petrol option, when the signal enters the
ECM, the ECM will switch the output on/off to the
fusebox. The ECM will switch the output on
sometimes for engine cooling reasons even though
the engine has been turned off.
Pressure switch 2 (Single switch)
The switch is normally open circuit. At a specific
pressure, the switch is shorted and allows the
condenser fans to turn on.
Excerpts:-
Condenser Fans
The HEVAC panel provides a signal normally at 12
volts for “off” condition and 0 volts for the “on”
condition, which in the case of petrol vehicles is fed
into the ECM and diesel vehicles directly onto the
coil of relay 18. In line is the Air–Conditioning
pressure switch 2, which turns the fans on/off.
When relay 18 is energised, it provides connection
between relays 13 and 14 (fan 1 and 2) in series or
parallel with each other. This is dependent upon the
state of the air–conditioning pressure switch 1.
For the petrol option, when the signal enters the
ECM, the ECM will switch the output on/off to the
fusebox. The ECM will switch the output on
sometimes for engine cooling reasons even though
the engine has been turned off.
Pressure switch 2 (Single switch)
The switch is normally open circuit. At a specific
pressure, the switch is shorted and allows the
condenser fans to turn on.
