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No power to crank and CAM sensor

Tiny
SPEEDY8305
  • MEMBER
  • 1996 CHEVROLET S-10
  • 67,000 MILES
When tried to start the vehicle I got no spark after testing all sensors and coil packs I found no power to crank and cam sensors tested pcm plug found power to some wires tested ground at plug found other wires were ground. Which wires should be power and which should be ground?
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Sunday, October 9th, 2011 AT 6:05 PM

30 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
At the cam sensor, pink wire is ignition feed, comes from engine fuse 5-- 20 amp in fuse box. Circuit goes hot when you turn on the key. Use a voltage tester at the fuse, with key on, anything?

You may have to check feed to and from ignition switch, Including the ignition switch.
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Sunday, October 9th, 2011 AT 6:19 PM
Tiny
SPEEDY8305
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I checked all fuses got good voltage have good ground to cam and crank plug but have no power to either plug tested the pcm plug couldnt which socket in the plug has to have power at it
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Sunday, October 9th, 2011 AT 6:57 PM
Tiny
JDL
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What is litre size of engine and vin? I looked at 4.3 vinW. Check splice 123, wiring harness near distributor. Should be same color wire already mentioned.
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Sunday, October 9th, 2011 AT 7:20 PM
Tiny
SPEEDY8305
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Im sorry its a 2.2 4 cyl no distributer only coil packs and they all checked out good, all new wires and plugs got power to pcm plug but no power to cam and crank sensor unless I jump the power from the battery buit still get no fire
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Sunday, October 9th, 2011 AT 8:18 PM
Tiny
SPEEDY8305
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Also plugged in scan tool vechicle passed with no codes but all dash light(ses, airbag, check guages, battery and abs lights all on recently changed the ecm as well if that helps any
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Sunday, October 9th, 2011 AT 8:22 PM
Tiny
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Its a 2.2l the vin is i
1gccs1442t8212298
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Sunday, October 9th, 2011 AT 8:38 PM
Tiny
JDL
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That voltage comes from pcm. Check power and grounds in the diagram.
A new pcm may need to be programed.
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Sunday, October 9th, 2011 AT 8:45 PM
Tiny
JDL
  • MECHANIC
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Note cam/crank sensor power.
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Sunday, October 9th, 2011 AT 8:49 PM
Tiny
SPEEDY8305
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Is that schem for the pcm or the ecu?
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Sunday, October 9th, 2011 AT 8:53 PM
Tiny
SPEEDY8305
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I located the cam and crank sensor wire and removed a piece of insulation and found no power to the wire whether key was on or off
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Sunday, October 9th, 2011 AT 8:56 PM
Tiny
JDL
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What ever you want to call it. You only got one engine computer.
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Sunday, October 9th, 2011 AT 8:58 PM
Tiny
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On my truck I have a ecu under the hood and a pcm inside the car
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Sunday, October 9th, 2011 AT 9:05 PM
Tiny
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My database didn't show that. I'll double check. Sorry if the info was wrong.
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Sunday, October 9th, 2011 AT 9:16 PM
Tiny
SPEEDY8305
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Its ok any help is good help my pcm is located under the kick panel in the vehicle I got power to the pcm and when I try to crank the truck with a voltage tester in a port of the plug I have a flickering light which tells me that there is a signal of output could the pcm be bad and not sending the signal?
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Sunday, October 9th, 2011 AT 9:26 PM
Tiny
JDL
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I looked through two different databases, wiring and component location, only found pcm, under the hood. I don't know what to tell you?
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Sunday, October 9th, 2011 AT 9:29 PM
Tiny
SPEEDY8305
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On a 1996 chevy s-10 4 cyl 2.2l I have a engine control module and a powertrain control module thats weird that you cannot find it
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Sunday, October 9th, 2011 AT 9:36 PM
Tiny
JDL
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There does show to be a derm behind right kick panel. Energy reserve module, I wouldn't fool with that because of airbags. I can only tell you what my database shows.
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Sunday, October 9th, 2011 AT 9:37 PM
Tiny
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I must apologize the part is called a Engine Control Module
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Sunday, October 9th, 2011 AT 10:07 PM
Tiny
SPEEDY8305
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My vehicle has a pcm and a ecu according to alldata I located the the pcm under the kick panel on the passenger side and the ecu is under the hood it says that the pcm may be defective
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Monday, October 10th, 2011 AT 5:38 AM
Tiny
JDL
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Sorry, I don't have access to alldata. I have mitchel and motors database. It seems all databases are not created equal.
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Monday, October 10th, 2011 AT 2:17 PM

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