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[erubus]

As above really. Wondering if someone can tell me which pins on the x20xev ecu plug are for the crank sensor.  I cant find the pinout i had.

Wanting to check that there arent any open/short circuits in the loom between the sensor plug and the ecu.

Cheers, gill

[TheBoy]

Not got my wiring schems to hand, but that engine should be in the Haynes BoB

[erubus]

Good point. I dont have an omega manual but sure i still have a cavalier one kicking about. I did have a pile of autodata printouts but theyre the pnes ive lost. Will try and find the cav book.

Gill

[erubus]

Bugger that was a dead end. The cavalier book doesnt have circuit diagrams for the x20xev for some reason. Has the v6's, LET and diesels that the book doesn't even cover but not the ecotec that it actually does cover. Good old haynes!

[Abiton]

According to Haynes Omega manual, there are two quite different types, depending on year.

For what Haynes calls "Early models" the relevant ECU connector pins are 2, 3, 21 and 19. From what I can make out the wire on pin 2 should be Brown/Red, pin 3's wire should be Grey/Red, pin 21 should be a Grey/Black wire.  At the 3-pin engine-bay connector, the numbers are:
ECU pin 2 - 3-way pin 3
ECU pin 3 - 3-way pin 2
ECU pin 21 - 3-way pin 1
ECU pin 19 - overall shield/screen of 3-core cable as far as 3-way connector.

For "Later models" we have a different situation. Pin 16 of ECU conn. goes to pin 1 of the 3-way with a Grey/Red wire, pin 24 of ECU conn. goes to pin 2 of the 3-way with a Grey/Black wire, and pin 29 of the ECU goes to pin 3 of the 3-way with a brown/red wire and to the overall screen of the 3-core cable as far as the 3-way conn.

What makes for an Early model or a late model?  As far as I know, if you have 4-digit fault codes, it'll be a late model, 2-digit codes will be an early model.  That's guesswork, not definitive though.

Best of luck. 

[erubus]

cheers for that. will have a play with it tomorrow.  managed to get it running reasonably well, albeit with the EML on, and it's still very very hard to start, so gonna risk taking it to work so i can get the new sensor.

Using the multimeter on an old loom i had sitting around I got continuity on the 5th pin down (from the cable side) on the middle row of pins as being the centre pin in engine bay and the 10th down, middle as the right hand pin (looking at the pin with the clip upwards)  left hand pin didn't have continuity on any pins.  tried the same pins on the loom on the car and still got continuity. 

will have a proper look with the info you've given me though.  cheers

Gill