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ETM to ECM wiring/Main Relay

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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subzerocarfanatic
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Year and Model: 2000 Volvo C70 HT
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ETM to ECM wiring/Main Relay

Post by subzerocarfanatic »

I am still learning to figure out all the wiring schematics and diagrams on the C70, can anyone help me with something.I need to know which pin #'s from individual wires coming out of the ECM are related to the Electronic Throttle Module.
I am trying to find and follow the wires from the ECM that go directly to the ETM so I can trace them to find a break or short and I also want to find the ones going to Relay #1 ( the blue one in front right corner) in the main fuse box so I can trace where they lead back to the ETM. There has to be a break or short between one of these points or bad connection because the ETM dash warning light only lights up when hitting a bad bump in the road. There is also a 15 amp fuse which is related to the ETM in the main fuse box right by the main relay that is related to the ETM.
I just got my power probe ETC3000 short and open wire tracer in yesterday and it would help to know which ones are directly related to the ETM so I can trace them.
I pray it's not the ETM wiring harness itself or bad wire inside the ETM, It has a used xemodex built in 2012 ETM in it now.

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