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S80 '98-'06 / S60 '00-'09 / V70 & XC70 '00-'07 General Forum for the P2-platform S60 / V70 / XC70 / S80 models |
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Lambda sensor wiring questionViews : 526 Replies : 6Users Viewing This Thread : |
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Jul 22nd, 2019, 10:23 | #1 |
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Lambda sensor wiring question
Hi all just a quick question about lambda sensor wiring .
I’ve Gota v70 2.5t and I’m wanting to fit a air fuel ratio gauge wich should be arriving today . But for the life of me I can’t find out via the internet wich wire is the signal wire for a 5 wire wideband lambda bank 1 . On a normal lambda it’s the black wire normally but I can’t find any info regarding the 5 wire |
Jul 22nd, 2019, 11:16 | #2 | |
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Jul 22nd, 2019, 15:56 | #3 |
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Thanks for the reply . It’s a 2003 2.5t . I’m positive my cars running lean . I’ve just bought a cheap eBay jobby . It’s got a needle and hopefully will tell me if it optimal rich or lean. This is the eBay item number 401818814525. Probably a load of rubbish and won’t work on my car lol
Last edited by Daz86; Jul 22nd, 2019 at 16:03. |
Jul 22nd, 2019, 16:07 | #4 |
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Why not just use cheap diagnostics to view the live fuel trim figures?
No specific tool required.
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2002 S60 SE D5 Manual 209000 miles |
Jul 22nd, 2019, 16:30 | #5 | |
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have you checked the fuel pressure under load ? Heated oxygen sensor (HO2S) diagnostic The front heated oxygen sensor (HO2S) is a lineal type and functions with current control. Therefore it is not possible to measure the signals from the heated oxygen sensor (HO2S) using a multimeter. The rear heated oxygen sensor (HO2S) is a binary type as with earlier heated oxygen sensors (HO2S). The Engine Control Module (ECM) checks the heated oxygen sensors (HO2S) when the conditions for diagnostics have been fulfilled. The following faults can be registered by the control module: Electrical fault in the circuits for the heated oxygen sensors (HO2S) and for the heated oxygen sensor (HO2S) preheating Adaptation.The control module checks that the long-term fuel trim is not higher or lower than the pre-defined values Large difference between the front and rear heated oxygen sensor (HO2S) adaptation.The control module checks that the difference between the rear and front heated oxygen sensor (HO2S) adaptation is not too great. The fault may be in the front or rear heated oxygen sensor (HO2S) or the wiring Heated oxygen sensor (HO2S) dynamics.The control module checks that the changeover period between rich and lean mixtures is not too long Unlikely signals between the front and rear heated oxygen sensors (HO2S).When the control module registers a rich mixture in the front probe at the same time that a lean mixture is registered in the rear probe or vice versa.
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Jul 22nd, 2019, 18:37 | #6 |
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Jul 22nd, 2019, 18:47 | #7 | |
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