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Low Volts to Cam Angle Sensor

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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Gobblin81
Posts: 5
Joined: 28 May 2013
Year and Model: 850 T5R+V70
Location: New Zealand

Low Volts to Cam Angle Sensor

Post by Gobblin81 »

Hi Guys
Im just finishing off an engine swap on my T5R
Went to fire up this morning and No Spark
Have traced the fault to a 2 volt input to the cam angle sensor , by all accounts this should be around battery voltage
Swapping out the ECU has not changed the issue
Can anybody give me a lead as where to look next ? Where is the power put into the ECU Can I meter it ?
Is there an easy way to check the continuity of that CAngle wiring
Thanks

Azik09
Posts: 133
Joined: 11 September 2014
Year and Model: S70 T5, 1997
Location: Russia, Caucasus
Has thanked: 2 times
Been thanked: 31 times

Post by Azik09 »

There are 2 types of camshaft sensors: supply voltage is 12 Volts for both types, and signal voltages are 12 V or 5 V. I need to know your ECU and camshaft sensor part numbers to give you correct answer.
If my English is bad, please correct me :oops:

Gobblin81
Posts: 5
Joined: 28 May 2013
Year and Model: 850 T5R+V70
Location: New Zealand

Post by Gobblin81 »

Thanks Azik09 Attached are photos of the hardware
Ive checked the cables from the ecu to the camshaft sensor , there is good continuity and no voltage drop

Even with a spare ecu installed i still get just over 2 volts at pin 3 on the sensor plug and less than half a volt on pin 2
850 ecu.jpg
850 cam angle sensor.jpg
I've been looking for the A6 pin ( ignition system ) on my onboard diagnostic system this seems to be missing
I only have 4 sockets installed on the A receptacle

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