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[Stev0]

Hey guys,

I picked up a scruffy omega for cheap a while ago, sold as a non runner..








Reason why it was dirt cheap - it was an import from UK, no parts in South Africa so no-one wants to touch it, and it has been extensively hacked in the wiring department, not to mention a few damaged panels.

Issues I managed to resolve: from the ECU fault codes and general diagnostics, I replaced the coil pack, RHS knock sensor and a few other bits and pieces and eventually got the engine to start and fault codes down to a few.





Here are the ones that remain (in order of appearance):

12 - Initiation of diagnosis
94 - Hall effect switch - voltage high
21 - Throttle position sensor - voltage high
16 - Knock sensor 1 - no voltage change
73 - Mass air flow sensor - voltage low
17 - Knock sensor 2 - no voltage change
74 - Mass air flow sensor - voltage high
57 - Idle speed control valve - voltage low
59 - Inlet manifold valve 1 - voltage low
31 - Engine RPM signal (crankshaft sensor) - no signal

If anyone can provide advice to how i can diagnose these codes I would appreciate greatly. what is high voltage/ low voltage indicative of? open circuit and short circuit, or something else?


Current issues: Car was originally a 2.5 v6, but somewhere in its life it received a X30XE engine transplant.. from what I can tell, some of the connectors were different between the 2 engines (specifically the TPS and cam position sensor), and what the guys did was cut and splice wires in order to get everything reconnected.



Firstly the TPS - could someone please confirm for me which wires go to which pin out on the TPS, as shown below? (the connectors have been changed and modified to fit, so I'm not sure):




Secondly, the cam position sensor (what i assume is the "hall effect switch"):

Here's what I assume is the connector from the harness (please confirm):





Here's the actual sensor, with the connector all mutilated to suite the harness plug, but now pluggable both ways






The question:






I think it's quite possible that a 5v driver could have blown on the ECU, especially if the TPS and CPS run off the same 5v signal circuit..


Thanks in advance for any assistance.

[Stev0]

it would be nice if someone just sent a pic of their TPS connector showing which wire connects where, same with CPS..

I've tried looking online but I'm not getting any luck..

[MonzaGSE]

Can you see any pin Numbers on the throttle position sensor? According to Haynes Brown/green is pin 1, blue/black is pin 2 and brown/blue is pin 3.
Cam sensor should have grey/red on pin 1, grey/black on pin 2 and what i assume is brown on pin 3.

Edit: the wire you have marked «shielded» should go to pin 3 on cam sensor would be my best bet.

[MonzaGSE]

When looking at your pictures it seems to me that you have the cam and TPS connector swapped.

[Doctor Gollum]

Electrically speaking, the 2.5/3.0 are the same although they may use different sensors.

Easiest thing would be to obtain a complete engine loom with sensors from a 2.5 with the same gearbox, ie auto/manual and fit that to your existing engine and ecu.

It may cost a bit to get this to you, but will simplify on going maintenance as it will be a clean slate... You'll know exactly what's what with it

[biggriffin]

When looking at your pictures it seems to me that you have the cam and TPS connector swapped.

.

This∆∆∆∆∆∆∆

[Stev0]

Thanks guys!!

Thanks for the info, Monza, just what i needed..

I have the pin count on the tps, but the CPS connector has been mutilated somewhat, so I'm unsure which side is pin 1 and which side is pin 3.. is there any way I can test? Will i cause permanent damage if i try it both ways?

The only identifying marks left is the close 3 grooves and the far 3 grooves on the inside of the connector.. is someone able to look at theirs and let me know where pin 1 is relative to those marks?

[omegod]

Talk about giving yourself a headache ! Good luck with it all the same 

[Stev0]

Talk about giving yourself a headache ! Good luck with it all the same 

Ironically enough, its this part of the process im most fond of.. once the car runs the excitement is over..

I spent almost 4 months finding the correct combination of parts for a Manta A rear disc brake conversion, which was complicated by the fact that i had to make it all fit under the original 13" wheels.

All i need is a wiring diagram, and preferably an actual running car to compare to.. omegas in SA came out with 2.2 engines almost exclusively..

[Stev0]

Could someone please do me a huge favour and unplug their Cam Position Sensor, and check which wire goes to which pin?

We already know CPS is:
grey/red on pin 1, grey/black on pin 2 and what i assume is brown on pin 3

I need to know which pin is pin 1 on the CPS side connector relative to the 3-slot features inside the connector, I dont just want to assume.

Regards