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Could Someone Point Me to An Engine Wiring Diagram 99 XC

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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dbo550
Posts: 67
Joined: 1 August 2009
Year and Model: 95 T5-R, 98 V70
Location: LouKy

Could Someone Point Me to An Engine Wiring Diagram 99 XC

Post by dbo550 »

Specifically I need to find out where the trigger signal for coils 2&3 is supposed to be coming from. I have power and ground at those coils and they are not firing.
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VCA
Posts: 645
Joined: 21 February 2008
Year and Model: 2008 S80 T6 AWD
Location: Orlando, FL
Been thanked: 5 times

Post by VCA »

dbo550 wrote:Specifically I need to find out where the trigger signal for coils 2&3 is supposed to be coming from. I have power and ground at those coils and they are not firing.
See the S70 wiring diagrams at https://www.matthewsvolvosite.com/volvo-wiring-diagrams/ for 1999, it applies to this car. Page 122. Each coil is fed trigger from the ECU. It might be worth pulling the ECU and cleaning the contacts. It's also possible you have a short in the engine harness...trigger is on pin 1. Have an oscilloscope to check for a pulse train?
2008 S80 T6 AWD
1999 S70 GLT

Responsible for the care of a '92 960 and an '07 S60R
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