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steven harwell
steven harwell Posted on Jun 12, 2018
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My mercedes e320 is reading 12 volts on the 5 volt ref at all my sensors is that normal?

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Paul

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  • Mercedes-Benz Master 2,808 Answers
  • Posted on Jun 13, 2018
Paul
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5 Related Answers

Anonymous

  • 359 Answers
  • Posted on Aug 20, 2008

SOURCE: Map sensor

Use a needle such as a sewing needle, stick it into each wire, and use your voltmeter from there.

No need for color codes....

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Joseph Howard

  • 753 Answers
  • Posted on Feb 26, 2010

SOURCE: i have a 2003 impala and its reading 5 volt

all your sensors run off the 5 volt ref. so you will have to trace your wiring harness from the pcm\ecm all the way out under the hood to locate the broken or pinched wire.

Anonymous

  • 749 Answers
  • Posted on May 28, 2010

SOURCE: when the Jeep was new the volt meter read 14

Generally the standard voltage should be 13.5 to 15.5 depending on the load that is being put on the vehicle and age of the battery an older battery may require more voltage to charge. Unless the voltage drops below 13 you are probably ok.

Anonymous

  • 1 Answer
  • Posted on Dec 03, 2010

SOURCE: I have a 2000 jeep grand cherokee limited and just

ok when the pcm detects something wrong whit the charging system the pcm show you in your board CHECK GAGES if this is not on, dont worry about

saailer

David Burbee

  • 1871 Answers
  • Posted on Sep 19, 2011

SOURCE: I have an 89 camaro

Hello! When you read +5 volts at the Coolant Temperature Sensor (CTS) tell me where the meter leads were connected....If you had the (+) probe on the Yellow wire at the CTS; Where was the (-) probe connected? did you connect it to the Black wire in the CTS connector? Reason I'm asking is this; In the world of +5 sensor voltage, ground is very important...If chassis ground is even slightly resistive, 5 volt sensors will malfunction...The Camero has some years on it and corroded or rusted ground straps are common...The 6.8 volt reading with the relay unplugged is normal because the PCM is reacting to the CTS input; dropping the voltage to the relay, telling it not to pull because it thinks the engine is cold...

Leave the connector in-place on the CTS...Push the points of two safety pins into the rear of the CTS connector...One into the Black wire and the other into the Yellow...Set meter to read 5 volts...On a cold engine you must read +5 volts...On an engine at operating temperature you must read less than 2 volts...The CTS drops voltage as temperature rises...send a comment...Guru...Saailer

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