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Spi: Engine Bay Wiring Connectors, Which Is Which?


Best Answer Spherix , 13 June 2021 - 01:53 PM

Thanks! The wire was indeed brown/pink, so all sorted now thank you. Go to the full post


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#1 Spherix

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Posted 12 June 2021 - 03:21 PM

Hi there,

 

I'm in the middle of sorting out my SPI's wiring loom, having never had an SPI and buying the car in boxes, I don't have any pictures to go by. Wiring diagrams here seem to show varying colours from what I'm encountering, so I figured I'd ask.

 

I'm down to the last two plugs: 

- 2-pin Pink/Black and Pink/green

- 2-pin Brown/yellow Brown/white (thicker)

 

And I have available:

- Temp sensor under the inlet manifold

- Injector plug

 

Hope someone knows! Thanks!



#2 hungdynasty

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Posted 12 June 2021 - 06:36 PM

 2-pin Pink/Black and Pink/green = coolant temp sensor

 

Engine coolant temperature (ECT) sensor
The engine coolant temperature (ECT) sensor is located on the coolant outlet
elbow. It is a temperature dependent resistor (thermistor), the voltage output of
which varies in inverse proportion to temperature, in that the output increases as
temperature decreases or the reverse. The change in resistance is monitored by
the ECM on a KG wire and as a result the ECM can adjust the length of injector
opening time required. The ECM supplies the coolant temperature sensor with
an earth path on a KB wire.

 

- 2-pin Brown/yellow Brown/white (thicker) = not sure, injector plug wire should be pink brown and yellow brown according to electric manual, may be your brown/white wire is actually brown/pink?

 

MEMS ECM
The ignition sense of the ECM receives battery voltage from fuse A4 in the
passenger compartment fuse box on a W wire provided the starter switch is in
position II. As a result the ECM supplies an earth from the main relay control on
a WK wire to one side of the main relay coil (within the MEMS relay module).
Since the other side of the main relay receives battery voltage on an N wire from
link 4 in the engine compartment fuse box, the relay will energise switching
battery voltage via the relay contacts on an NK wire to the injector(s), purge
valve, stepper motor, ignition coil, manifold heater (Japan only) and positive feed
to the ECM.


#3 Spherix

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Posted 13 June 2021 - 01:53 PM   Best Answer

Thanks! The wire was indeed brown/pink, so all sorted now thank you.




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