I have this code come up on my VR6: 00527 - Intake Manifold Temperature Sensor (G72) 30-00 - Open or Short to B+ I dont seem to notice any problems really but when i clear the code the revs drop down about 100rpm and then goes back up, Then the code reappears. Which one is the G72 and where is it located? Cheers Mat
G72 is located here. Check the wiring or replace the sensor. Shorted to + means open circuited. The ECU is probably thinking the manifold temp is -48C if this is case.
The wiring looks ok, All intact. I guess i check for 12v accross the pins to make sure the problem is not further back? If i have 12v at the pins then i guess its the sensor.
Got my ELSA working! → Pull 2 pin connector off intake manifold temperature sender -arrow-. ‒ Check wiring between test box and 2 pin connector for open circuit according to current flow diagram. Contact 1+socket 36 Contact 2+socket 33 Wire resistance: Max. 1.5 ω ‒ Check wire between control unit connector and 2 pin connector contact 2 for short to contact 1 wire and to vehicle earth, according to current flow diagram. Contact 2+socket 36 One contact is fine to the ECU but the other (Earth) is broken somewhere. Cant chase it back that far with out taking the oilpack off Might just run a new one for it, Would be the best way i think. All other sensors that share this earth to the ECU are fine, I have no idea where they are joined though. I cant get the big plug apart on the engine. Someone seems to have put a wire all the way through it so you cant get it apart!
All the brown wires earth to the engine behind the Aux pump. Run a separate earth from G72 and the fault should go away. T42 connector is twist counter clockwise and pull apart.
They all earth to a bolt or something behind the Aux water pump? So they dont go through the T42 connector? I can get the T42 apart, But at the bottom there is a yellow wire connecting both sides so i cant pull it apart enough to get into it. Might just have to rip it apart and deal with it after.
Scratch that with the earth bloted to the engine. Different path! This page describes your G42/72 sensor in relation to your VR6, controlled by M2.9.1. It is similar a MK3 VR6 like mine with M3.8.1. Use it to troubleshoot the issue. It would appear your wire on Pin 2 is broken some where in the harness on the engine end of the T42 plug. Try jumping G42/72 sensor earth flylead with G62 coolant temp sensor and then tack down the problem. Good luck, let us know how you get on.
Sigh... Got no where chasing the wire back. I can meter it into the T42 plug and out the other side but not back to the ECU. All the other sensors are fine, Trouble is i dont know where they are all joined together. Problem is now that my fuel pumps is constantly priming. Turn the ignition on and it starts and doesnt stop. I have to turn it off as i dont want to fill the engine with fuel (Can this happen?) Not sure what the problem is with this now, Not done it before[:^(]
At bloody last! Got home early to have a play with it (run out of space at the unit) First thing, fuel pump. For some reason it was on constant prime. First thing I checked was the relay 109 as I know this is for the pump. Noticed it wasn't clicking in so took it out and gave it a tap and it works now! Then the inlet temp. I got sick of not being able to take the T42 apart because of this cable so I cut it. As I did I found the end of the one I was looking for, it had broken off! All back together now and no faults. Both the coolant and inlet temp say -49 with the ignition on but when you start it they kick in and read properly. No fault codes!!! Cheers for your help Mat
Well tapping 109 worked, Might have disturbed the others in the process Car seems to start better and idle lightly. Not really driven it to see if anything has made a difference. One thing i did notice today was that the water temp did not display on the MFA Saying that i cant remember seeing it there before! Just need to find 5th gear now for castle combe
well you'll never see water temp on mfa cos it doesn't have one mfa has oil temp, and will display --- till oil gets over 50degrees. the sender should be a small single pin unit in an oil chanel, green/black wire. not sure where it is on a vr but assume its on the filter housing
That one won't work either as I have disconnected it for the VDO gauge Going to get a t-piece and connect it back up, the VDO gauge is not good enough to take an actual reading.
