Question about Chevrolet Camaro

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1995 Camaro 3.4 v6 engine. Has OBDI but the plug is 16 pin OBDII. Haines manual says there is no way to diagnois computer at plug by jumping it. My parts man says he has done so on same vehicle, only a Pontiac. I have tried but nothing. Car refuses to fire. Power to ignition module, parts house said was bad. Replaced and still nothing.

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  • insurancelog May 04, 2010

    I finally got your answer to show. My appoligies. Question, is there any way to jump plug with paper clip? Second, I do not believe the fuel pump is coming on when I switch on the car. (just purchased it at auction) No buzz. Can not get fire out of plugs, coils check out. New Ignition Module.



    Crank sensor is my next replacement. Any ideas.



  • insurancelog May 04, 2010

    I have never started this car. Purchased it at auction for Grandaughter. Has a "service engine soon light" not a check engine light that I can find.



    Is it possible to flash a code by jumping the connector that is in the car?



    I do not think fuel pump is working as I do not hear it buzz when I turn on ignition.



    Bob C

  • insurancelog May 04, 2010

    No such thing as OBDII to OBDI adaptor that I can find. I asked can the ObdI system on OBDII plug be tested by using a clip and making engine light flash as in true OBDI? If so what pins and how. This is 1995 Camaro

  • insurancelog May 05, 2010

    Helpful

  • insurancelog May 18, 2010

    At least two of you guys are smoking something if no more than sticking your heads up too many tail pipes. OBDI to II adaptor, I don't think so...Hit by lightning, where did they hire you from??

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5 Answers

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  • Chevrolet Master
  • 17,970 Answers

For 1995 Chevrolet Camaro 3.4L SFI 6cyl the OBD Diagnostic Link Connector is located front seating area, driver side, under dash, mounted on passenger side of steering column.

The following procedures apply only to 1993-94 vehicles with the 12-pin diagnostic connector only. A scan tool, such as GM's Tech 1® must be used to retrieve diagnostic trouble codes from 1995-98 vehicles with the 16-pin diagnostic connector. When using a scan tool, make sure to carefully follow all instructions supplied by the manufacturer.


Listings of the trouble for the various engine control system covered in this repair guide are located in this section. Remember that a code only points to the faulty circuit NOT necessarily to a faulty component. Loose, damaged or corroded connections may contribute to a fault code on a circuit when the sensor or component is operating properly. Be sure that the components are faulty before replacing them, especially the expensive ones.

The Data Link Connector (DLC) may be located under the dash and sometimes covered with a plastic cover labeled DIAGNOSTIC CONNECTOR.

  1. The diagnostic trouble codes can be read by grounding test terminal B . The terminal is most easily grounded by connecting it to terminal A (internal ECM ground). This is the terminal to the right of terminal B on the top row of the DLC connector.
  2. Once the terminals have been connected, the ignition switch must be moved to the ON position with the engine not running.
  3. The Service Engine Soon or Check Engine light should be flashing. If it isn't, turn the ignition OFF and remove the jumper wire. Turn the ignition ON and confirm that light is now on. If it is not, replace the bulb and try again. If the bulb still will not light, or if it does not flash with the test terminal grounded, the system should be diagnosed by an experienced driveability technician. If the light is OK, proceed as follows.
  4. The code(s) stored in memory may be read through counting the flashes of the dashboard warning lamp. The dash warning lamp should begin to flash Code 12. The code will display as one flash, a pause and two flashes. Code 12 is not a fault code. It is used as a system acknowledgment or handshake code; its presence indicates that the ECM can communicate as requested. Code 12 is used to begin every diagnostic sequence. Some vehicles also use Code 12 after all diagnostic codes have been sent.
  5. After Code 12 has been transmitted 3 times, the fault codes, if any, will each be transmitted 3 times. The codes are stored and transmitted in numeric order from lowest to highest.
The order of codes in the memory does not indicate the order of occurrence.
  1. If there are no codes stored, but a driveability or emissions problem is evident, the system should be diagnosed by an experienced driveability technician.
  2. If one or more codes are stored, record them. Refer to the applicable Diagnostic Code chart in this section.
  3. Switch the ignition OFF when finished with code retrieval or scan tool readings.
Its possible that this LINK can be helpfull.

Also, can check this wiring diagrams... ENGINE CONTROLS

1995 Camaro 3.4 v6 engine. - bfc6724.jpg

3.4L (VIN S) engine control wiring diagram (1 of 3)-1995 vehicles

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3.4L (VIN S) engine control wiring diagram (2 of 3)-1995 vehicles



3.4L (VIN S) engine control wiring diagram (3 of 3)-1995 vehicles


Check this wiring diagrams... CHASSIS WIRING

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Chassis wiring diagram (1 of 3)-1993-95 vehicles

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Chassis wiring diagram (2 of 3)-1993-95 vehicles

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Chassis wiring diagram (3 of 3)-1993-95 vehicles


Hope this help.

Posted on May 04, 2010

  • ZJ Limited
    ZJ Limited May 18, 2010

    When there is a problem starting or driving a vehicle, two of the most
    important checks involve the ignition and the fuel systems. The
    questions most mechanics attempt to answer first, "is there spark'' and
    "is there fuel'' will often lead to solving most basic problems. For
    ignition system diagnosis and testing, please refer to the information
    on engine electrical components and ignition systems.

    SPARK TEST
    Because of the high
    voltage produced by the distributorless ignition system and to avoid
    overstressing the coil/module, an inductive or neon type spark tester
    should be used to check for spark. These tools are commonly available at
    most auto parts stores. Follow the tool manufacturer's instructions to
    test for spark.

    IGNITION COILS




    1. Remove the ignition coil(s).


    2. Using an ohmmeter, check the resistance between the primary
      terminals on the underside of the coil. The resistance should be
      0.50-0.90 ohms.



    3. Check the resistance between the secondary terminals. It should be
      5000-10,000 ohms.



    4. If the coil failed either test, replace the coil.

    The Multi-port Fuel Injection (MFI) and Sequential Fuel Injection
    (SFI) systems were used on all of the vehicles covered by this
    information. Even though they are called slightly different names, the
    systems are similar in operation. The systems are controlled by a
    Powertrain Control Module (PCM) which monitors the engine operations and
    generates output signals to provide the correct air/fuel mixture,
    ignition timing and idle speed. Input information to the PCM is provided
    by the oxygen sensor, temperature sensors, detonation sensor, mass air
    flow sensor and throttle position sensor. A system may use all or some
    of these sensors, depending on the year and engine application. The PCM
    also receives information concerning engine rpm, road speed,
    transmission gear position, power steering and air conditioning status. For scan OBD codes, need visit one autozone or find the right tool.

    Good luck.

  • ZJ Limited
    ZJ Limited May 18, 2010

    Also can check harnesses and adaptors here:
    - Fabricating
    an OBDII to OBDI Harness Adapter Plug
    -http://www.webpg.net/

    Good luck.


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  • Chevrolet Master
  • 757 Answers

You could use an OBDII to OBDI adapter plug. But the likelihood of the problem generating a trouble code is small if it is also not showing the check engine light. In that case try checking the fuel pump operation and fuel system, as well as the fuel pump fuse and resistor.

Posted on May 04, 2010

  • Mike LaPres
    Mike LaPres May 18, 2010

    It is an OBDII to OBDI adapter...not the other way around.

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1995 Camaro Z28 w/ LT1engine. Code#32EGR and code#44 on Bank1. Can you tell me where to go from here. Replace parts???

Posted on Feb 21, 2014

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  • Chevrolet Master
  • 1,851 Answers

I am thinking fuel pump - but how to know without spark?
I can't imagine you have not tried spraying WD40 down the intake but if not try it. As for the problem - I am guessing someone changed the entire wiring harness. The best thing to do is take down the vin - go to the dealer and request a print out - the the wiring - this will tell you what came this unit - -- - now - try thinking out of the box - -cars that get hit by lightening in the middle of the night - some times - develop these problems - had a VOLVO - beauty it was - had to get rid of it - never would run right.
Best of luck - try the dealer for RECALLS too -
1995 Camaro 3.4 v6 engine. - 52f297e.jpg
Cars are not smart -we are

Posted on May 06, 2010

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  • Master
  • 10,319 Answers

Check the fuel pump relat and the oil pressure switch. The oil pressure switch has 3 wires which one goes to the fuel pump. That one operates the pump upon 1st starting the engine. When the oil pressure reaches its normal pressure the computer shuts off that circuit and then turns on the relay to the pump. that relay will stay running till you shut the engine off. replace the oil pressure switch first if no fuel is getting to the injectors

Posted on May 04, 2010

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