VersaTuner - tuning software for Mazdas
VersaTuner - tuning software for Mazdas
Page 7 of 7 FirstFirst ... 567
Results 91 to 102 of 102

Thread: More fuel pump relay fun!

  1. #91
    The Diagram Dude pcb's Avatar

    2002 mazda protege 5

    Join Date
    Jun 2011
    Location
    ontario, canada
    Posts
    4,339
    Quote Originally Posted by pcb View Post
    Do this and see if you can feel clicking on the fuel pump relay.
    You can tap the ground wire a bunch of times to test.



    Test for B+ on the red with white stripe wire (I misspoke earlier and said green stripe), with the FP terminal grounded
    Do this with everything plugged in...
    It turns on the fuel pump relay.

    If your pump runs, your relays are probably fine.
    The Diagram Dude

  2. #92
    The Diagram Dude pcb's Avatar

    2002 mazda protege 5

    Join Date
    Jun 2011
    Location
    ontario, canada
    Posts
    4,339
    Another picture of the DLC terminal..
    Although this is a jumper wire for the brakes... Use the FP terminal.

    Sigs are visible only in your first post on a page. To change your thread display preferences, click here and enable 'Always Show Signature'.

  3. #93
    The Diagram Dude pcb's Avatar

    2002 mazda protege 5

    Join Date
    Jun 2011
    Location
    ontario, canada
    Posts
    4,339
    The fuel pump relay is turned on and off by the ECU when the ECU provides a ground path on the violet wire.

    The violet wire also goes to the DTC terminal at the FP (fuel pump) terminal. Connecting this wire to ground powers up the fuel pump and proves that your fuel pump relay is working.

    Sigs are visible only in your first post on a page. To change your thread display preferences, click here and enable 'Always Show Signature'.

  4. #94
    The Diagram Dude pcb's Avatar

    2002 mazda protege 5

    Join Date
    Jun 2011
    Location
    ontario, canada
    Posts
    4,339
    I've been wondering why you blew your engine fuse in the first place.
    There are a few circuits on that fuse. The oxygen sensor heaters, the ignition capacitor and the coils.



    If perhaps the oxygen sensor heater wire shorted to ground or the sensor heater itself shorted out, then it could have blown the fuse.

    Perhaps a bad O2 sensor is cause for the ECU to shutdown the engine ??

    There is no list of conditions that I've found that will force the ECU to shutdown the engine. There's a list for "crank no start" but most still provide spark and fuel.

    If you're code says "heater circuit" high or low then you may have sourced your problem.



    The code you threw could go a long way towards solving your problem.
    Sigs are visible only in your first post on a page. To change your thread display preferences, click here and enable 'Always Show Signature'.

  5. #95
    The Diagram Dude pcb's Avatar

    2002 mazda protege 5

    Join Date
    Jun 2011
    Location
    ontario, canada
    Posts
    4,339
    A spark test will help verify if your ECU has shutdown the engine.

    PS.. I remember helping one guy that had a single spark then nothing, every time he tried to start his car.

    It turned out to be a bad crank sensor.
    The ECU would allow one revolution of the engine and one spark without crank sensor data then shut down the engine.
    Sigs are visible only in your first post on a page. To change your thread display preferences, click here and enable 'Always Show Signature'.

  6. #96
    The Diagram Dude pcb's Avatar

    2002 mazda protege 5

    Join Date
    Jun 2011
    Location
    ontario, canada
    Posts
    4,339
    Quote Originally Posted by Catzilla View Post

    This car is cursed.
    You may be right !!?
    You may need to call in the experts.

    You'll need a Priest, a Shaman, some Holy Water and these guys... They specialize in Mazda hauntings !!

    Sigs are visible only in your first post on a page. To change your thread display preferences, click here and enable 'Always Show Signature'.

  7. #97
    Registered Member Catzilla's Avatar

    Protege5

    Join Date
    Sep 2018
    Location
    DFW
    Posts
    56
    LOL

    New fuel pump relay installed.

    Code reader acquired.

    No start.

    No codes stored.

    No surprise.

  8. #98
    The Diagram Dude pcb's Avatar

    2002 mazda protege 5

    Join Date
    Jun 2011
    Location
    ontario, canada
    Posts
    4,339
    Check for spark.
    Sigs are visible only in your first post on a page. To change your thread display preferences, click here and enable 'Always Show Signature'.

  9. #99
    Registered Member

    2003 protege 5

    Join Date
    Jul 2011
    Location
    so cal
    Posts
    82
    Have you done a visual inspection of the wire down to the crank sensor? Minkushunter had the same issue I did where that wire chaffed and caused a starting issue. I believe his chaffed on a pulley. Mine looked like it had worn through on the lifting eyelet near the cam cover. I couldn’t see it until I went to replace it and once I pulled the clip off it was right there.
    It would short out on the eyelet randomly killing the engine. And with no codes being thrown. Just a thought and only costs about 10-15 min to examine

  10. #100
    Registered Member Catzilla's Avatar

    Protege5

    Join Date
    Sep 2018
    Location
    DFW
    Posts
    56
    Quite possible, as the part of the wire's connector that clips to the metal stand is long gone, so it's ziptied in place but was loose for who knows how long before I got this junk car.

    Will check next window of opportunity I get, probably in a few days.

  11. #101
    The Diagram Dude pcb's Avatar

    2002 mazda protege 5

    Join Date
    Jun 2011
    Location
    ontario, canada
    Posts
    4,339
    Quote Originally Posted by sleeprp5 View Post
    It would short out on the eyelet randomly killing the engine. And with no codes being thrown. Just a thought and only costs about 10-15 min to examine
    What he said ^^^
    Sigs are visible only in your first post on a page. To change your thread display preferences, click here and enable 'Always Show Signature'.

  12. #102
    The Diagram Dude pcb's Avatar

    2002 mazda protege 5

    Join Date
    Jun 2011
    Location
    ontario, canada
    Posts
    4,339
    Quote Originally Posted by Catzilla View Post
    Quite possible, as the part of the wire's connector that clips to the metal stand is long gone, so it's ziptied in place but was loose for who knows how long before I got this junk car....
    If by "metal strand" you mean the shielding on the crank sensor wiring, then it needs to be grounded.
    The signal from the crank sensor can get lost if the shielding isn't connected.
    The crank sensor signal is very small.

    Sigs are visible only in your first post on a page. To change your thread display preferences, click here and enable 'Always Show Signature'.

Page 7 of 7 FirstFirst ... 567

Similar Threads

  1. How to test Fuel Pump Relay?
    By PowrSlave in forum Protege5
    Replies: 5
    Last Post: 04-05-2018, 01:03 AM
  2. where is the fuel pump relay on my 01 mp3 protege
    By eaguiar72 in forum Mazda MP3
    Replies: 1
    Last Post: 09-11-2014, 07:46 AM
  3. fuel pump relay
    By jbrewer4639 in forum Mazdaspeed Protege
    Replies: 3
    Last Post: 04-07-2011, 07:51 PM
  4. fuel pump relay
    By HONDA_KILLER in forum Mazdaspeed Protege
    Replies: 7
    Last Post: 01-20-2010, 06:41 PM
  5. Fuel Pump Relay
    By CantCMe in forum Mazda Protege
    Replies: 2
    Last Post: 10-20-2007, 07:48 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •