Bosch Hall distributor to a cam sensor

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Superflo
Posts: 4
Joined: Mon Nov 09, 2015 6:11 pm
ECU Model: S60 Pro

Bosch Hall distributor to a cam sensor

Post by Superflo »

Hello everyone,

I tried to make a 1 tooth cam sensor with a Bosch Hall effect distibutor. I welded the centrifugal system, removed 3 of the 4 rotor wings. I wired the dist like this:
-Red: 12V
-Green: pin 23 cam sensor Hall effect
-Black: Sensor ground

I'm not sure it is correct because I get only 7V between red and black and I presume the sensor needs 12V to work.

Any inputs?
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stevieturbo
Posts: 3577
Joined: Tue Aug 02, 2011 12:08 pm
ECU Model: No ECU
Location: Norn Iron

Re: Bosch Hall distributor to a cam sensor

Post by stevieturbo »

And what power supply did the sensor have before ?

And same wiring pinout ? ie are you sure what you have done is correct ?

Does the reading change as the tooth passes ?
Superflo
Posts: 4
Joined: Mon Nov 09, 2015 6:11 pm
ECU Model: S60 Pro

Re: Bosch Hall distributor to a cam sensor

Post by Superflo »

I had time to check the voltage supply on a stock ignition harness, the sensor is powered with 12V. If I change the wiring to:
-Red: 12V
-Green: pin 23 cam sensor Hall effect
-Black: Ground
Will it cause problems to the ECU?
stevieturbo
Posts: 3577
Joined: Tue Aug 02, 2011 12:08 pm
ECU Model: No ECU
Location: Norn Iron

Re: Bosch Hall distributor to a cam sensor

Post by stevieturbo »

Change ? That's also how you said you wired it in the first post ?

ECU wont mind if it's a 12v sensor or 5v. Equally many sensors will be quite happy with a 5 or 12v supply too.
Superflo
Posts: 4
Joined: Mon Nov 09, 2015 6:11 pm
ECU Model: S60 Pro

Re: Bosch Hall distributor to a cam sensor

Post by Superflo »

The sensor sees only 7V between 12V and sensor ground, if I change the wiring the sensor will see 12V but I wonder if it will cause some problems to the ECU.
stevieturbo
Posts: 3577
Joined: Tue Aug 02, 2011 12:08 pm
ECU Model: No ECU
Location: Norn Iron

Re: Bosch Hall distributor to a cam sensor

Post by stevieturbo »

That makes no sense.

You're either giving it 12v or 5v. At no point does the sensor see 7v. Between 12v and ground, there can only be 12v.

What does the scope trace show ?
Alex DTA
Posts: 1622
Joined: Fri Feb 28, 2014 1:03 pm
ECU Model: S40 Pro
Distributor: DTA
Firmware Version: 79

Re: Bosch Hall distributor to a cam sensor

Post by Alex DTA »

The ECU is fine with a 12v signal.
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