volvo b5244 cam sensor... who knows what?

[740ATL]

Guys,

does anyone know the ins and outs of this thing? Hall sensor? VR sensor? Is there a toothed wheel inside?

What are the dimensions of the bolt holes, as in, how far apart are they?

http://i20.ebayimg.com/01/i/000/9a/8a/61f1_1_b.JPG

[JohnMc]

If it's what I'm thinking, it just roughly tells the ECU which half of the 4 cycles it is in, something it can't tell from jsut a crank sensor.

[the poi]

VR, with a craaaazy toothed wheel on the inside. It's or cam synching and angle checking for the VVT cams. Whatcha need it for?

edit:// /\/\/\ the older WB cam sensors were hall sensors that did just that, this is the new design for VVT

[740ATL]

hmm. I was thinking of using it for a sequential ignition application where the crank sensor was not already present. Sequential is possible with a cam wheel alone as long as it has the right number of teeth. The block-mount distributor only has 4 teeth which is not enough. I've thought about making a custom trigger wheel for it, but I haven't invested the mental effort yet.

Basically, Volvo uses the same bolt-spacing a lot and I was guessing that perhaps the center-to-center distance on the cam sensor would be the same as the head-mount distributor. eh... probably not tho.

[linuxman51]

can't open it up?

[500dollar744ti]

where's the actual sensor, that's just the housing?

[Alex Buchka]

My '94 and '98 b5234t's both have a VR sensor on the cam with a single tooth trigger wheel to act as sync. Making a custom trigger wheel should be pretty simple since the existing one is only stamped steel with a raised lip.

[kildea]

VR, with a craaaazy toothed wheel on the inside. It's or cam synching and angle checking for the VVT cams.



isn't that thing wild.

i connected it all just to see what the signal looks like.

[MikeHardy]

9186812 is just a housing.

the sensor will be bolted into that protruding section when you get one. the sensor for that housing is 9202134.

the trigger wheel (aperture) is 9186813.

some info about it

The Engine Control Module (ECM) uses the signals from the camshaft position (CMP) sensor and the engine speed (RPM) sensor to establish the operating cycle of the engine. This enables the engine control module (ECM) to:

*start the engine more quickly
*control the correct ignition coil and injector
*function as a substitute for the engine speed (RPM) sensor
*check the camshaft continuous variable valve timing (CVVT).

The pulse wheel on the camshaft has five teeth with different gaps which correspond to a specific cylinder.
For further information, also see Knock sensor (KS) , Engine speed (RPM) sensor and Function .

The sensor, which is a magnetic resistor with a permanent magnet, is grounded in the control module and supplied with current from the control module. When one of the teeth on the camshaft pulse wheel passes the camshaft position (CMP) sensor, a signal is transmitted to the control module from the camshaft position (CMP) sensor. The signal varies between 0-1 V and is low when a flank passes the camshaft position (CMP) sensor.

The camshaft position (CMP) sensor is positioned at the rear of the engine on the camshaft with continuous variable valve timing (CVVT).

The engine control module (ECM) can diagnose the camshaft position (CMP) sensor.