15 replies to this topic

[ochumi]

Hi

I have a question about the aircon on mini spi, how control the base idle speed? the ECU for japanese model is different? just only increase always base idle speed? does it have a special sensor? so if i want to put an air-con system in my spi how it´s the best way?

 

 

thanks

[FlyingScot]

ECU is the same part number
Idle speed is controlled by timing adjustment and stepper motor altering the throttle plate.

It will adjust by itself

FS

[ochumi]

ECU is the same part number
Idle speed is controlled by timing adjustment and stepper motor altering the throttle plate.

It will adjust by itself

FS

 

so I understand that the ECU manages it alone

[FlyingScot]

Yes in SPi the MEMS ECU will adjust the timing (quick) and opening of the throttle (slower) to maintain the idle speed when a load is applied from the air con compressor.

FS

[ochumi]

Yes in SPi the MEMS ECU will adjust the timing (quick) and opening of the throttle (slower) to maintain the idle speed when a load is applied from the air con compressor.

FS

Ok, but if you put for example a SC kit this with throttle doenst come with stepper and if you dont want to increase the inlet always.. is there anyway fiting a valve? or something?

[Mike L]

My 89 Japan spec (carb so no ECU) has a vacuum solenoid electronically energized to open when the a/c is turned on. It activates an adjustable vacuum diaphragm that pushes the throttle open a little to compensate for the extra load at idle.

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[Screwdriver]

Just read through this thread and am a bit confused. Is the Japanese SPi ECU different from the UK version's i.e. do JDM Mini owners need to source a different type of ECU? 

 

On a related note, anyone know how/ where to find the ECU's number? 

 

Thanks! 

Edited by Screwdriver, 06 May 2017 - 01:32 PM.

[xrocketengineer]

Just read through this thread and am a bit confused. Is the Japanese SPi ECU different from the UK version's i.e. do JDM Mini owners need to source a different type of ECU? 

 

On a related note, anyone know how/ where to find the ECU's number? 

 

Thanks! 

Prior to about 1997 the UK ECU and Japanese ECU were the same. However, when the Japanese models started using the SPI system with the MPI engine block (no distributor) the ECU was unique. 

For example, on mine, which is a 1994 with an MNE101070 ECU, I can control the condenser fan (and compressor clutch I believe) with the SP ACR 2. This is also the standard ECU for that year in the UK. 

[hungdynasty]

1998 Japan SPI with air conditioning.

[Screwdriver]

Very useful info. Thanks! 

 

My JDM was registered in July 1996, just before the switch to the MPi block which happened in September of 1996 I believe. If you're right, I won't need to source an ECU from Japan, which saves me quite a bit of trouble.  

 

I wonder if there are any other mechanical bits that are unique to JDM Coopers. I know that the air conditioning bits are rare in the UK. Anything else?

 

 

Prior to about 1997 the UK ECU and Japanese ECU were the same. However, when the Japanese models started using the SPI system with the MPI engine block (no distributor) the ECU was unique. 

 

For example, on mine, which is a 1994 with an MNE101070 ECU, I can control the condenser fan (and compressor clutch I believe) with the SP ACR 2. This is also the standard ECU for that year in the UK. 

 

[xrocketengineer]

The belt from the compressor clutch to the alternator is hard to find (at least on this side of the pond) because it is so short.
I am currently using an MNE101170 ECU. However, I had it rebuilt and the alarm code removed.

[Screwdriver]

This belt?

 

 

 

 

The belt from the compressor clutch to the alternator is hard to find (at least on this side of the pond) because it is so short.
I am currently using an MNE101170 ECU. However, I had it rebuilt and the alarm code removed.

[xrocketengineer]

 

This belt?

 

 

 

 

The belt from the compressor clutch to the alternator is hard to find (at least on this side of the pond) because it is so short.
I am currently using an MNE101170 ECU. However, I had it rebuilt and the alarm code removed.

 

Not that one. The one in the picture installed on the invisible alternator:

 

 

And here after the alternator re-materialized:

 

Edited by xrocketengineer, 07 May 2017 - 12:21 AM.

[FlyingScot]

Very useful info. Thanks! 
 
My JDM was registered in July 1996, just before the switch to the MPi block which happened in September of 1996 I believe. If you're right, I won't need to source an ECU from Japan, which saves me quite a bit of trouble.  
 
I wonder if there are any other mechanical bits that are unique to JDM Coopers. I know that the air conditioning bits are rare in the UK. Anything else?
 
 

Prior to about 1997 the UK ECU and Japanese ECU were the same. However, when the Japanese models started using the SPI system with the MPI engine block (no distributor) the ECU was unique. 
 
For example, on mine, which is a 1994 with an MNE101070 ECU, I can control the condenser fan (and compressor clutch I believe) with the SP ACR 2. This is also the standard ECU for that year in the UK.

Rear windows are non opening type if fitted with A/C. In fact most of the differences are a consequence of the Air con.- hole in inner wing, different wiring loom, MFU under dash. The ECU up to the change is the same as xrocketengineer has pointed out. He also mentions the sequence of numbers for the part number -Japan didn't use the 5AS immobiliser so the Cooper ECU is MNE101070 but at the same type in the UK this would have been MNE101170 which means it is coded to and needs a 5AS alarm/immobiliser unit unless it has been internally altered.

FS

[Screwdriver]

Strange - my ECU is numbered MNE 101170, which should require an immobilizer. My car doesn't have one.

 

I'm going to order the fan belt and the aircon receiver dryer unit from my source in Japan. Anything else worth storing for a rainy day? (The alternator looks massive relative to the UK version)

 

 

 

Rear windows are non opening type if fitted with A/C. In fact most of the differences are a consequence of the Air con.- hole in inner wing, different wiring loom, MFU under dash. The ECU up to the change is the same as xrocketengineer has pointed out. He also mentions the sequence of numbers for the part number -Japan didn't use the 5AS immobiliser so the Cooper ECU is MNE101070 but at the same type in the UK this would have been MNE101170 which means it is coded to and needs a 5AS alarm/immobiliser unit unless it has been internally altered.

FS

 

Edited by Screwdriver, 09 May 2017 - 07:48 PM.