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[ScottieMV6]

Ok had fault code 46 which is SAI. Unplugged the SAI under the front wing and still got the fault code.

Is it a case of having the codes cleared or should they just go?

[Abiton]

Disclaimer: not sure if the system is the same on V6s, or if what I'm about to say is indeed true!

But...I suspect that the ECU is not monitoring the SAI pump motor, but actually the solenoid valve shown in the image below.



So the problem that your ECU is objecting to may be associated with this solenoid valve, rather than the pump.  Have a look at the connector/connections, for corrosion or broken wiring.

HTH,

Pete

[Abiton]

Hmm, just had a look at the V6 fault code list and it looks like I may have been talking nonsense above.  The code 46 definitely refers to the pump voltage.

So maybe you just need a few clean starts for it to go away? (Though I'd've thought if you unplug the motor, the ECU would object, if that's what it's monitoring.  :-/ )

[ScottieMV6]

Could it just be that the codes need clearing on a tech 2?

[ScottieMV6]

Right had the non return valve off the car and it seems to be fubared. I can suck and blow without resistance.

Could this be causing fault code 46? If so I will just replace this part. 

[Kevin Wood]

Might as well just block off the 2 pipes to the manifold and remove the whole system rather than replace parts, TBH.

However, as stated, the fault code is due to the electrical circuit from the ECU which controls the SAI pump relay and the solenoid valve, so the one-way valve is not likely to be the cause. I would check the resistance of the solenoid coil and that the circuit back to the ECU has continuity.

Kevin

[ScottieMV6]

Might as well just block off the 2 pipes to the manifold and remove the whole system rather than replace parts, TBH.

However, as stated, the fault code is due to the electrical circuit from the ECU which controls the SAI pump relay and the solenoid valve, so the one-way valve is not likely to be the cause. I would check the resistance of the solenoid coil and that the circuit back to the ECU has continuity.

Kevin

Thanks Kevin. Sorry to be a bit of a dunce but how do I do that?

[ScottieMV6]

Right had the multimeter out and checked for continuity in the wires that go to the SAI solenoid (if I have the right part - next to the battery at the front of the engine bay) and they are fine.

Can anyone tell me which relay is for the SAI pump?

[ScottieMV6]

Checked the solenoid wiring for continuity with my multimeter - all ok it seems.

Changed number 1 relay (the correct one I hope) for another one but still have fault code.

I have done all this with the pump under the front wing disconnected still, will this make a difference? I didn't think so as someone stated earlier that the fault code was to do with the solenoid valve. Or should I reconnect the pump and try it again?

Please help as I am tearing my hair out trying to sort this! 

[Kevin Wood]

Pump shouldn't make any difference as it is the other side of the relay, so ECU can't tell if it's connected or not.

Bear in mind it might take a few engine starts before the problem is cleared, after rectification.

Kevin

[ScottieMV6]

Pump shouldn't make any difference as it is the other side of the relay, so ECU can't tell if it's connected or not.

Bear in mind it might take a few engine starts before the problem is cleared, after rectification.

Kevin

Ok. I assume a tech 2 would clear the codes as well?