Quote:
Originally Posted by Richard_TD
Our recently acquired V70 TDi isn't boosting properly, and wasn't when we got it. It's a late model with the MSA 15.8 system. I thought the waste gate being held on with jubilee clips and wire might have been the root cause but there was no change when I fitted another turbo.
A VIDA-DICE scan showed two codes, before and after the new turbo was fitted- ECM-000B Mass air flow (MAF) sensor - Signal too low and ECM-001D Turbocharger (TC) control valve - Signal too low. I believe a previous owner fitted a new MAF sensor, so I'm ruling that out for the moment.
I've checked the voltages at the MAF plug and got
1. +5.02V
2. close to 0V
3. 0V
4. +5.01V
5. 0V
Some Googling suggests that Pin 2 should have +12V. Is that correct, and if it is where should I be looking? The wire just disappears into a harness but I don't know where it goes. Is there a fuse anywhere? Would it be ok to connect it to another 12V supply?
For the moment I'm not looking at the TC Control valve, I've a feeling it will start getting the right signals once the MAF is working.
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Hi,
You resolve this problem connect 12 V to pin 2? I have the same problem, my Volvo 2,5 TDI model year 2000 have problem with MAF and if I check voltage at connector have the same as you
1. +5.02V
2. close to 0V
3. 0V
4. +5.01V
5. 0V
You connect 12 V to pin 2 and after this, all working? Thank you for your reply.
R.