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08-08-2017, 07:38 PM
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#1
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Name: Tobin
Title: 5.7 IDI Powaa!
Status: Not Here
Join Date: Oct 2008
Location: Oviedo, FL
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Posts: 1,506
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94-98 12V CPS Voltage
Been looking online for what the reference voltage is for a 12v crank position sensor. I figured it was 5v but looks like some chrysler stuff is 8v. Trying to build something to run a regular gasser autometer tach with the stock 12v crank position hall effect sensor. I think I need to feed it 5v and then use a pull up resistor between the power wire and the signal wire. Anyone else do this?
Tobin
__________________
2006 Dodge 2500 QCLB 4x4 Goerend 48RE
1977 F250 RCLB 4x4 "High Boy" 12 valve, 180 pump, 5x.014, S363/S475, Goerend 47RH, NP271, 2007 D60/Sterling 10.5, 40" Toyo MTs
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08-09-2017, 07:52 AM
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#2
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Name: jlbayes
Title: Too Much Time
Status: Not Here
Join Date: Mar 2011
Location: michigan
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Posts: 2,399
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Have not but I can tell you the pcm does feed it a 5v reference.
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Jacob, 97 rclb
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08-09-2017, 10:02 AM
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#3
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Name: BigPapa
Title: Truckless
Status:
Here
Join Date: Jan 2008
Location: Springfield, TN
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Posts: 5,040
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According to my wiring diagrams, '94-'95 uses an 8V supply, PCM pin 7, Orange wire. '96-'98 uses a 5V supply, PCM pin A17, Violet/White wire.
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Scott
2003 Avalanche Z71
Common sense is like deodorant. The people that need it most never use it.
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08-09-2017, 11:30 AM
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#5
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Name: Tobin
Title: 5.7 IDI Powaa!
Status: Not Here
Join Date: Oct 2008
Location: Oviedo, FL
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Posts: 1,506
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Thanks! I wonder if a 5v would work anyways with the 94-95 hall effect sensor. Has anyone made something like that to work with a aftermarket gasser tach? I had one working on my 97 with the PCM sending the crank sensor voltage and a 1K ohm pull up resistor between the signal and +12v wire on the tach. I can't get it to work with a 94-95 hall effect sensor and +12v to the sensor.
__________________
2006 Dodge 2500 QCLB 4x4 Goerend 48RE
1977 F250 RCLB 4x4 "High Boy" 12 valve, 180 pump, 5x.014, S363/S475, Goerend 47RH, NP271, 2007 D60/Sterling 10.5, 40" Toyo MTs
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08-09-2017, 09:04 PM
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#6
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Name: Tobin
Title: 5.7 IDI Powaa!
Status: Not Here
Join Date: Oct 2008
Location: Oviedo, FL
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Posts: 1,506
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So I built a 5v voltage regulator and fed the +5v to a 96-98 crank position sensor and used a pull up resistor (1k ohm) between the signal wire a +12v power and hooked a 4cyl gas tach (2 notches in a Cummins balancer) to it and it seems to work good. I probably need to verify it with a held held tach or something.
Maybe Jory will chime in and let me know if this is accurate or not.
__________________
2006 Dodge 2500 QCLB 4x4 Goerend 48RE
1977 F250 RCLB 4x4 "High Boy" 12 valve, 180 pump, 5x.014, S363/S475, Goerend 47RH, NP271, 2007 D60/Sterling 10.5, 40" Toyo MTs
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08-09-2017, 09:21 PM
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#7
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Name: WUnderwood
Title: CompD Minion
Status: Not Here
Join Date: Aug 2006
Location: Texas
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Posts: 8,418
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Gotta ask, what is the 'hall effect'?
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2011 Ford F-150 Lariat 4X4
RIP BFD99, jponder, and Forrest Nearing
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08-09-2017, 09:31 PM
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#8
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Name: Tobin
Title: 5.7 IDI Powaa!
Status: Not Here
Join Date: Oct 2008
Location: Oviedo, FL
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Posts: 1,506
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Hall effect sensor is what the crank position sensor is. It detects the notch in the harmonic balancer.
__________________
2006 Dodge 2500 QCLB 4x4 Goerend 48RE
1977 F250 RCLB 4x4 "High Boy" 12 valve, 180 pump, 5x.014, S363/S475, Goerend 47RH, NP271, 2007 D60/Sterling 10.5, 40" Toyo MTs
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08-10-2017, 09:14 AM
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#9
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Name: jlbayes
Title: Too Much Time
Status: Not Here
Join Date: Mar 2011
Location: michigan
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Posts: 2,399
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Quote:
Originally Posted by WUnderwood
Gotta ask, what is the 'hall effect'?
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A Hall effect sensor is a transducer that varies its output voltage in response to a magnetic field. Hall effect sensors are used for proximity switching, positioning, speed detection, and current sensing applications.
Google definition.
Feed a sensor voltage and pick the pulse from the passing component/widow.
__________________
Jacob, 97 rclb
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08-11-2017, 06:44 PM
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#10
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Name: GAmes
Title: Retired Apache pilot
Status: Not Here
Join Date: Jun 2012
Location: Killeen, TX
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Posts: 271
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Quote:
Originally Posted by Tobin
Hall effect sensor is what the crank position sensor is. It detects the notch in the harmonic balancer.
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Ok, just for clarity, it is an engine speed sensor, it cares not what the crankshaft's position is. The damper, (not a balancer), can be installed in any position.
__________________
'97 Dodge 3500, G56, slightly bombed, A million+ miles, started 2nd million on 8/24/13 Now past 1.3 million and going strong.
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08-11-2017, 10:33 PM
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#11
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Name: DieselWrencher
Title: 6cyl Vette
Status: Not Here
Join Date: Dec 2006
Location: Mitchellville, Ia
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Posts: 2,886
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Quote:
Originally Posted by Tobin
So I built a 5v voltage regulator and fed the +5v to a 96-98 crank position sensor and used a pull up resistor (1k ohm) between the signal wire a +12v power and hooked a 4cyl gas tach (2 notches in a Cummins balancer) to it and it seems to work good. I probably need to verify it with a held held tach or something.
Maybe Jory will chime in and let me know if this is accurate or not.
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This was my plan with my set up on my 72 for my dakota digital cluster, I just haven't gotten that far yet. I was just going to use +12v but maybe I'll have to reduce it too?
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1968 Corvette 12v Cummins Compounds 47RH
1976 K30 CC SWB 12v 47RH
2000 Excursion VE 24v 47RH 4x4
1972 K30 Longhorn P-Pumped 24v 47RH Compounds
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08-12-2017, 05:59 PM
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#12
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Name: dieselpolaris
Title: Too Much Time
Status: Not Here
Join Date: Apr 2009
Location: Clyman, Wisconsin
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Posts: 516
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If you want to use an aftermarket tach of any sort the easiest way to do it is to take a magnetic pickup and connect it with an hei ignition module out of a gm distributer. Will allow you to run any gasser tach out there. We're using this setup on our puller to run a sunpro 8k tach and it worked flawlessly off the 4 balancer bolts.
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Double Trouble 1976 F-250 3.0 Puller
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08-12-2017, 07:23 PM
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#13
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Name: Tobin
Title: 5.7 IDI Powaa!
Status: Not Here
Join Date: Oct 2008
Location: Oviedo, FL
Member`s Gallery
Posts: 1,506
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Quote:
Originally Posted by GAmes
Ok, just for clarity, it is an engine speed sensor, it cares not what the crankshaft's position is. The damper, (not a balancer), can be installed in any position.
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Well it I believe it is called a crank position sensor but yes it is just a speed sensor. Damper/balancer...same thing. Yes, I know some engines are externally balanced and this isn't.
Quote:
Originally Posted by dieselpolaris
If you want to use an aftermarket tach of any sort the easiest way to do it is to take a magnetic pickup and connect it with an hei ignition module out of a gm distributer. Will allow you to run any gasser tach out there. We're using this setup on our puller to run a sunpro 8k tach and it worked flawlessly off the 4 balancer bolts.
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Good to know, I like that idea too.
__________________
2006 Dodge 2500 QCLB 4x4 Goerend 48RE
1977 F250 RCLB 4x4 "High Boy" 12 valve, 180 pump, 5x.014, S363/S475, Goerend 47RH, NP271, 2007 D60/Sterling 10.5, 40" Toyo MTs
Last edited by Tobin; 08-12-2017 at 07:29 PM.
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08-12-2017, 07:32 PM
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#14
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Name: Tobin
Title: 5.7 IDI Powaa!
Status: Not Here
Join Date: Oct 2008
Location: Oviedo, FL
Member`s Gallery
Posts: 1,506
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Quote:
Originally Posted by DieselWrencher
This was my plan with my set up on my 72 for my dakota digital cluster, I just haven't gotten that far yet. I was just going to use +12v but maybe I'll have to reduce it too?
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I am not sure if the +12v will work. I am scared to try it and fry a $100 sensor. I tried hooking up +12v to a 94/95 +8v sensor and it didn't work but the sensor could have been bad in the first place. I am not sure the extra voltage would kill it.
__________________
2006 Dodge 2500 QCLB 4x4 Goerend 48RE
1977 F250 RCLB 4x4 "High Boy" 12 valve, 180 pump, 5x.014, S363/S475, Goerend 47RH, NP271, 2007 D60/Sterling 10.5, 40" Toyo MTs
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08-12-2017, 09:28 PM
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#15
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Name: GAmes
Title: Retired Apache pilot
Status: Not Here
Join Date: Jun 2012
Location: Killeen, TX
Member`s Gallery
Posts: 271
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Quote:
Originally Posted by Tobin
Well it I believe it is called a crank position sensor ...... Damper/balancer...same thing.
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Believe what you want. The factory service manual calls it an engine speed sensor and so does Cummins Quickserve. There is also a note on Quickserve that notes the vibration damper. They are not the same as a balancer, regardless of those too lazy to learn the proper nomenclature.
Cummins QuickServe Online | COLA
__________________
'97 Dodge 3500, G56, slightly bombed, A million+ miles, started 2nd million on 8/24/13 Now past 1.3 million and going strong.
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08-13-2017, 06:49 AM
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#16
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Name: Tobin
Title: 5.7 IDI Powaa!
Status: Not Here
Join Date: Oct 2008
Location: Oviedo, FL
Member`s Gallery
Posts: 1,506
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Quote:
Originally Posted by GAmes
Believe what you want. The factory service manual calls it an engine speed sensor and so does Cummins Quickserve. There is also a note on Quickserve that notes the vibration damper. They are not the same as a balancer, regardless of those too lazy to learn the proper nomenclature.
Cummins QuickServe Online | COLA
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Ok, thanks for the total derail.
__________________
2006 Dodge 2500 QCLB 4x4 Goerend 48RE
1977 F250 RCLB 4x4 "High Boy" 12 valve, 180 pump, 5x.014, S363/S475, Goerend 47RH, NP271, 2007 D60/Sterling 10.5, 40" Toyo MTs
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08-13-2017, 09:16 AM
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#17
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Name: GAmes
Title: Retired Apache pilot
Status: Not Here
Join Date: Jun 2012
Location: Killeen, TX
Member`s Gallery
Posts: 271
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Quote:
Originally Posted by Tobin
Ok, thanks for the total derail.
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Happy to provide a little instruction. Any derail was your pointless argument.
__________________
'97 Dodge 3500, G56, slightly bombed, A million+ miles, started 2nd million on 8/24/13 Now past 1.3 million and going strong.
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08-13-2017, 10:40 AM
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#18
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Name: Tobin
Title: 5.7 IDI Powaa!
Status: Not Here
Join Date: Oct 2008
Location: Oviedo, FL
Member`s Gallery
Posts: 1,506
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Quote:
Originally Posted by GAmes
Happy to provide a little instruction. Any derail was your pointless argument.
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You provided nothing constructive.
__________________
2006 Dodge 2500 QCLB 4x4 Goerend 48RE
1977 F250 RCLB 4x4 "High Boy" 12 valve, 180 pump, 5x.014, S363/S475, Goerend 47RH, NP271, 2007 D60/Sterling 10.5, 40" Toyo MTs
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08-13-2017, 01:17 PM
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#19
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Name: BigPapa
Title: Truckless
Status:
Here
Join Date: Jan 2008
Location: Springfield, TN
Member`s Gallery
Posts: 5,040
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Come on fellows, give it up.
I think everyone understands what everyone here is talking about except for Mr. Underwood.....
__________________
Scott
2003 Avalanche Z71
Common sense is like deodorant. The people that need it most never use it.
Last edited by BigPapa; 08-13-2017 at 01:19 PM.
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08-13-2017, 01:31 PM
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#20
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Name: biggy238
Title: Too Much Time
Status: Not Here
Join Date: Aug 2008
Location: Just North of Wrong
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Posts: 10,868
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What is the purpose of the pull up resistor in this circuit? Curious is all.
What is Hall Effect and How Hall Effect Sensors Work - YouTube
Sent from my XT1575 using Tapatalk
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