9 replies to this topic

[mattduvall03]

SPI Rover Mini Japanese Spec

 

I am struggling on what to do next. I started the mini this morning and let it warm up. I started off down the road turned on the heater blower, turned left and the car died. Attempted to jump with no success. It would turn over but never ignited. The battery light would not come on in the ignition 2 spot and fuel pump would never engage. Once I got the car home I started to investigate. I removed the main relay pack connectors and immediately noticed a scorched connector (see image) The blackened connector runs to the heater manifold. I am fairly confident the relay pack is blown, I checked for resistance on it and only got open loop on all connections. The trouble I am having is the heater. I don't want to replace the relay pack to have this happen again. The Heater blower is currently working and I am having trouble running down the wires that complete the circuit that blew. Does anyone have any ideas where I should start looking  ?

 

http://imgur.com/a/7Thva

 

 

 

 

 

Attached Files

•  YWB_connector.jpg   29.58K   23 downloads
•  engine_bay.jpg   69.33K   27 downloads
•  YWB10022 Wiring Pin out.jpg   48.13K   34 downloads
•  heater_dash.jpg   62.32K   23 downloads

[FlyingScot]

Sorry to ask the obvious question but you do know that the heater in the car isn't the manifold heater described on my diagram?

This connection often has a burnt appearance as you can see from my picture.

It is highly unlikely you have blown all four relays in the MFU (relay pack) as they control different functions.

Look in pinned threads in injection for the wiring diagram for your car.

I've moved your post to the injection section.

FS

[GraemeC]

I haven't looked at the wiring diagrams so excuse me if this is way off....

Could the heater blower have blown a fuse in the supply to the relay pack? I can't remember if it is fed from the maxi fuses or not.

[FlyingScot]

Best to check the wiring diagram......

JDM Spec cars are different in some specific areas of wiring, this looks like a pre 1997 car.

FS

[mattduvall03]

Update - Looks like my voltmeter was misbehaving. I was able to get continuity across Pins 1 3 and 8. So my relay box may not be blown. I am looking at the haynes manual wiring diagram (pre 96 Fuel Injection). The battery light doesn't light up when the key is placed in the ignition position 2. I am trying to find what circuit causes that light to turn on ....Ok I found it I will check the circuit and report back 

Edited by mattduvall03, 02 December 2015 - 10:39 PM.

[xrocketengineer]

From what you are saying it seems that line fuse 7 (LF7) on a white wire in/out is blown. It feeds both, the instruments and the engine management system. 

[spiguy]

If your manifold PTC heater is knackered and it's causing that fuse to blow, you could just disconnect it. I ran my 1995 cooper injection with it disconnected (I knocked it off one day and couldn't get it back on) and I can honestly say I didn't notice any difference. It only operates for a short while as the engine is warming up, then switches off. It is supposed to aid in cold running, but it doesn't really have much effect IMO.

[FlyingScot]

Turn fuel droplets into vapour when cold. That's the idea anyway......


FS

[spiguy]

Turn fuel droplets into vapour when cold. That's the idea anyway......


FS

Aye, that's the idea....

[xrocketengineer]

The manifold heater is not fed by LF7. It only supplies power to the main relay coil, the instruments and the ECU. Being a Japanese Mini, there is no immobiliser. If the fuse is blown, something else is causing the overload or the fuse connections need cleaning.