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Question about a wheel speed sensor on VX Berlina LS1?

Discussion in 'VT - VX Holden Commodore (1997 - 2002)' started by scrano, Sep 15, 2012.

  1. scrano

    scrano Member

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    Hi guys, I've been having that problem that a lot of guys on here have been having, where every now and then, the Traction Control Off light is coming on, and I can't turn it on or off, until I re-start the car.

    From all of the reading that I've done on here, it sounds as though it's a faulty wheel speed sensor, and a couple of weeks ago when it happened, I did why someone had suggested in another thread, about faulty ABS modules, and possible faulty wheel speed sensors, and I physically unplugged the ABS wiring loom when it happened (whilst the car was still running), too see if it corrected the light/button issue, and it did, and it went away as soon as I unplugged the loom, and then plugged it back in, but I wanted too know, if there's a way that I can find out for myself, which wheel speed sensor is faulty?

    I'm assuming that it's just 1 of the wheel speed sensors, because I haven't been getting any other sort of warning lights coming on at all, just the Traction Control Off light, and most guys that have had faulty ABS modules, have reported a bunch of various ABS related warning lights coming on, when it was the module itself.

    I don't mind replacing the sensor myself, I just need too know, whether there's a way that I can find out which one is faulty?

    Also, are they just called wheel speed sensor's, because I did a search on eBay on Holden Wheel Speed Sensor, and a few different other variations of that, like VX Speed Sensor, LS1 Wheel Sensor, and stuff like that, on eBay, and I couldn't find much listed for some reason.

    Thanks in advance guys
     
  2. Brett_jjj

    Brett_jjj Well-Known Member

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    Bridge pins 5 and 12 in the diagnostic connector under the dash and turn the ignition switch to ON, this will flash up any logged ABS error codes on the ABS dashlight, very similar to flashing up the diagnostic ECU codes on the check engine light on older commys.
    Code 12 shows theres no ABS error codes logged. I have a complete list of the various ABS error codes for VX models if you post up what codes you get, if any.
     
  3. scrano

    scrano Member

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    Thanks mate, I didn't think that you could actually bridge the pins to bring up error codes, with an LS1/Gen 3 powered VX at all, I thought that you could only do it with the V6's. I thought that you had to do it via a scan tool, but wasn't absolutely sure. I'll have a look tomorrow and see what comes up

    Thanks again
     
  4. scrano

    scrano Member

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    Is there a thread on here somewhere, about how too read/interpret the ABS dash lights, as they flash. I'm assuming that it's similar to what you'd do with the V6's, where a certain amount of flashes, corresponds to a certain fault code, but I'm not sure whether it's exactly the same flash reading sequence, like the 6's. I just wanna be sure that I interpret the light flashing sequence right.

    Also, I'm assuming that it'll be pin 5 from the top left of the ALDL connector, and continue on to the bottom left to right for the second row of pins, is that right?

    Again thanks
     
  5. scrano

    scrano Member

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    I just came across this thread, on reading ABS error codes http://forums.justcommodores.com.au/holden-commodore-how-tos/56087-abs-error-codes.html, with a VR/VS, but it looks as though it's the same procedure for VT/VX's, so I just wanted too make sure that it'll work with a VX that's powered by an LS1/Gen 3?

    And I also found this thread about reading error codes for V6 powered VT/VX's http://forums.justcommodores.com.au/holden-commodore-how-tos/23665-checking-error-codes-vt-vx.html, but I just wanted too make sure that it's the same flash sequence, so I read/interpret the error codes correctly (I know it won't work for reading engine error codes, but I'm hoping that it'll work for reading the abs error codes)

    Thanks mate
     
  6. Brett_jjj

    Brett_jjj Well-Known Member

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    The VT to VZ workshop manual says that bridging pins 5 and 12 in the diagnostic connector will flash up the ABS fault codes on all VT and VX models. Theres a big list of ABS codes, theyre read just the same as normal ECU codes were read on older commys,
    eg- 1 flash, followed by 2 quicker flashes, equals code 12 etc.
     
  7. scrano

    scrano Member

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    Thanks mate, I appreciate that, I really do. I'll give it a go tomorrow, and see what error codes come up. I might send you a PM tomorrow with the list of codes that come up, because I've found a list of some of them, but I don't think its the complete list, just the main ones. That's if you don't mind mate
     
  8. Brett_jjj

    Brett_jjj Well-Known Member

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    Na, not a problem mate, glad to help out if I can.
     
  9. scrano

    scrano Member

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    Thanks mate, it's appreciated. I'm looking at a VT/VX workshop manual here, and I'm trying too find a complete list of all of the ABS error codes, and I can't find them, but I have found the codes for the wheel speed sensors. It looks as though 28 is for a general/unknown wheel speed sensor fault code, 21, 25 are for the front sensors, and 31, and 35 are for the rears, but then further down it says that 23, and 27 are for front wheel speed sensors, and 33 and 37 are for rear wheel speed sensors, so it's sort of unclear, because it doesn't even break it down into which code is for which sensor, and it obviously lists 2 sets of codes for the front, and the rear (21, and 25 for the front, or 23, and 27, and then 31, and 35 for the rear, and also 33 and 37). So it's a little confusing
     
  10. scrano

    scrano Member

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    Just a question, why can't I find wheel speed sensor's when I'm searching for them on eBay? I must be using the wrong search phrase or something?? I've tried a bunch of variation's, using Holden, gen 3, LS1, and even dropping both wheel, and speed from the search phrase, and I'm not finding anything.

    I don't know whether they have another specific name that they go by, or whether I'm just using the wrong search phrases. I just wanted too see what they're worth, but I can't even find an eBay listing, under the search phrases that I'm using, so I'm obviously doing something wrong
     
  11. Brett_jjj

    Brett_jjj Well-Known Member

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    Only one I could find on ebay was this one.

    COMMODORE / CALAIS VR to VT ABS BRAKE WHEEL SENSOR. NEW GEN.HOLDEN | eBay

    I thought I had a copy of the ABS/ETC error codes on my desktop somewhere, and I just found them,

    Heres a list of ABS/ETC error codes for VT to VY, but these codes can only be flashed up by bridging the terminals 5 and 12 in the diagnostic connector on VT and VX models, for other models, you will need a suitable scantool to read these codes.

    Code 12= Start up code/ system ok.
    Code 21= Front right wheel speed sensor faulty signal.
    Code 23= Front right wheel speed sensor short or open circuit.
    Code 25= Front left wheel speed sensor faulty signal.
    Code 27= Front left wheel speed sensor short or open circuit.
    Code 28= Front wheel speed sensor frequency incorrect.
    Code 31= Rear right wheel speed sensor faulty signal.
    Code 33= Rear right wheel speed sensor short or open circuit.
    Code 35= Rear left wheel speed sensor faulty signal.
    Code 37= Rear left wheel speed sensor short or open circuit.
    Code 41= Front right inlet valve solenoid.
    Code 42= Front right outlet valve solenoid.
    Code 45= Front left inlet valve solenoid.
    Code 46= Front left outlet valve solenoid.
    Code 47= Priming valve solenoid.
    Code 48= Switching valve solenoid.
    Code 51= Rear right inlet valve solenoid.
    Code 52= Rear right outlet valve solenoid.
    Code 55= Rear axle inlet valve solenoid/Rear left inlet valve solenoid.
    Code 56= Rear Rear axle outlet valve solenoid/Rear left outlet valve solenoid.
    Code 61= Pump motor or relay faulty.
    Code 62= RPM signal incorrect.
    Code 63= Valve solenoid relay circuit faulty.
    Code 67= Stop light switch circuit faulty.
    Code 71= Control module internal fault.
    Code 72= Data fault.
    Code 73= Requested torque circuit fault.
    Code 74= Actual torque circuit fault.
    Code 78= Incorrect optional coding.
    Code 85= Voltage too low.

    Code 58 for gen 111= Throttle relaxer PWM interface fault.
    Code 62 for gen 111= RPM signal fault.
    Code 64 for gen 111= Throttle relaxer control module position fault.
    Code 65 for gen 111= Throttle relaxer motor fault.
    Code 66 for gen 111= Throttle relaxer control fault.
     
  12. scrano

    scrano Member

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    Thanks for posting those fault codes, because that's a fair bit more detailed than what I had. That link that you posted from eBay, is the only one that I could find too, which had me thinking that they might actually have different name for some stupid reason (even though it's the same thing)

    I wasn't sure about that eBay listing when I came across it, because it says that it's everything through to VT, so I didn't know whether there was a design change for the VX at all???
     

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