Thank so much for the photos....
To complete useful manuals about Rover Mini Mpi, download:
In my opinion, all modifications in sensors with an mpi ecu are dangerous a with unexpected results...even with original
one´s could occur problems...LOL,... if you need equivalents references, ask me, please...
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I'd like to share with you a curiosity/investigation
You can check the full explanation it at
I´ve compared yours pinouts in ecu connectors with mine, and although I can´t view all wires in your pictures, I suppose they are the same
wires, the same colors, the same pin numbers...If you can, check it using files c158.jpg and c159.jpg
In summary, our air con systems installations are equals, but different from original ones as you can check in
AC_japan_page24.jpg (Rave_CD_elxn970e.pdf) and Blackconnector_page19.jpg (electrical_cdxn990e.pdf). The explanation is in
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"AIR CONDITIONING OPERATION (JAPAN)
The air conditioning system may only be operated with the starter switch in
position II. The position of the temperature control determines the threshold at
which the system operates and the blower switch permits selection of four
different blower motor speeds.
MEMS ECM
The thermistor monitors the temperature at the evaporator and provides
feedback on S and SR wires to the A/C thermostat. Dependent on the level of
cooling required the temperature control can be adjusted, providing input on YR
and YB wires to the A/C thermostat. The A/C thermostat supplies an aircon
request signal to the ECM on a GW wire via the dual pressure switch. The ECM
responds by providing an earth on a RW wire to one side of the compressor
clutch relay coil and one side of the condenser fan relay coil.
Air conditioning switch and condenser fan
When the air conditioning switch is operated, battery voltage is switched from
fuse A6 in the passenger compartment fuse box on a G wire via the air
conditioning switch on a GW wire to one side of the condenser fan relay coil,
compressor clutch relay coil and the aircon blower relay coil (located within the
relay module). As a result the compressor clutch relay energizes, switching
battery voltage from fuse A6 via the relay contacts to the compressor clutch.
Since the compressor clutch mounting is connected to earth, the clutch will
operate to engage the compressor. The condenser fan relay is simultaneously
energized when the compressor clutch relay is energized, switching battery
voltage from fuse A9 on a U wire via the condenser fan relay contacts to the
condenser fan on a U wire. Since the other side of the condenser fan is
connected to earth, the fan will operate."
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Our pins 19 y 35 in Black Connector (c159) are empty, without wires.... so, ECu cannot control air con system and, in certain circumstances it may be necessary:
- when you stop at traffic lights, the ecu must increase idle (the same as when the car is cold)
- when the machine is hot, the ecu must cut air con, to prevent machine damage
The only explanation I can find is that our system was not installed at the factory in England, but by the final distributor... it was very common on 1990's Rover Cars...
I wan´t to connect pin 19 y 35 in Black Connector to Air Con system as in AC_japan_page24.jpg, it is very simple, but I´m not sure of Rover Specifications and I'm afraid to damage the ECU if Rover Manuals are incorrect....
Do you know any other Rover Mini Mpi with Air Con to contrast information...?
Here, in Spain, it´s very strange....
Any information, would be appreciated....
Regards, Jaime
