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Author Topic: Camshaft Voltage  (Read 167 times)

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halhorn73

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Camshaft Voltage
« on: 17 September 2021, 13:16:39 »

Hi
Shall it be 5 or 12V on the camshaft sensor on a omega 2.0 16V 1998 mod. Today it's araound 2.5 to 0

Halvor
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Doctor Gollum

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Re: Camshaft Voltage
« Reply #1 on: 17 September 2021, 16:54:07 »

V6 reference voltage is 5V.

Suspect the 2.0 will be similar.

What is the resistance doing and does it change as the engine cranks?
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halhorn73

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Re: Camshaft Voltage
« Reply #2 on: 17 September 2021, 17:04:22 »

I check wit my scope now..
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halhorn73

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Re: Camshaft Voltage
« Reply #3 on: 17 September 2021, 18:13:08 »

Hi
Theres no voltage from the ecu, removed cover and disconnected the camshaft sensor. Measured direct over pins on ECU and there no short circuit to ground either. Seems like the 5v to IAT is fine. The car is in limp mode.
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Re: Camshaft Voltage
« Reply #4 on: 17 September 2021, 23:24:02 »

I would try a new sensor.

Did you check the return circuit as well?

Also, you may find that the engine needs to be running so that the ecu can see the crank and cam signals in order to cross reference them...
« Last Edit: 17 September 2021, 23:25:41 by Doctor Gollum »
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halhorn73

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Re: Camshaft Voltage
« Reply #5 on: 18 September 2021, 07:50:56 »

Hi
THX for the help. A new one is one the way, I come back with status when i changed it. Maybe I change the ECU to a speeduino.
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Andy H

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Re: Camshaft Voltage
« Reply #6 on: 18 September 2021, 11:21:50 »

Hi
THX for the help. A new one is one the way, I come back with status when i changed it. Maybe I change the ECU to a speeduino.
15 years ago I was looking to improve the ignition on an early V8 Range Rover. I spent a lot of time looking at Megasquirt and diyEFI but never actually got round to splashing any money.
Good to see that there is life in the diy ECU scene - I assumed that it had died out.
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