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Thread: D4 GEARBOX FAULT P0928-13 GEARSHIFT LOCK SOLENOID - OPEN/CIRCUIT

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    D4 GEARBOX FAULT P0928-13 GEARSHIFT LOCK SOLENOID - OPEN/CIRCUIT

    Hi guys, would appreciate any input on the above. Gearshift solenoid has locked the shifter and when hitting the brake doesn't actuate, if I overide the solenoid and use the release under the cup holder its harsh going into reverse and then driving its stuck in 3rd. Checked gearshift solenoid plug #9 positive and #10 neutral and have 10 volts regardless of brake pedal pushed ignition on or off. Plug to mechatronics is in correctly and wiring is all good. Vehicle has done 140,000ks.
    Any ideas and does anyone know what the 13 represents after the fault code? P0928-13
    Cheers Greg.

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    Hi Greg,

    I have just had this issue with an 8 speed TCS (transmission control switch), my fault code was;
    P176C-11 "Transmission Range Selector Lock Control Error - General Electrical Failure - Circuit Short to Ground"

    In short, I managed to fix mine and create a work around if it ever fails again, I intend on writing up a quick recovery guide for the 8 speed sticky forum.

    Cheers
    Marc

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    Hi Greg,

    What year model is your D4? I thought you might have had an 8 speed with the dial, but I'm guessing you have a 6 speed with a lever?

    Cheers
    Marc

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    Hi Greg.

    The "13" means Open Circuit, "14" would mean Short Circuit or Short to Ground.

    The 8 speed shift lock solenoid is labeled as 9V, so I would assume 10V in enough to operate if it's the same/ similar as the 6 speed.

    Are you able to disconnect the cable where you measured the 10V, and measure the resistance of the solenoid itself? The 8 speed solenoid is roughly 6 ohms.

    I suspect your solenoid has failed.

    Cheers
    Marc

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    Quote Originally Posted by Mattblack59bus View Post
    In short, I managed to fix mine and create a work around if it ever fails again, I intend on writing up a quick recovery guide for the 8 speed sticky forum.
    I’m keen to see what you’ve worked out and done with this Marc. Sounds like something worth knowing.

    Cheers,
    Scott
    D4 TDV6 MY14 with Llams, Tuffant Wheels, Traxide DBS, APT sliders & protection plates, Prospeed Winch Mount w/ Carbon 12K, Mitch Hitch & Drifta Drawers
    Link to my D4 Build Thread
    D3 2005 V8 Petrol
    Ex '77 RRC 2 door. Long gone but not forgotten.

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    Hi guys, yes it's a shifter 2010. Unfortunately I think I'm going to have to remove the solenoid and ohms test. It is looking like the culprit. Not an easy task by the looks... would like to hear from anyone whos accessed one? The loom plug so deep down so impossible to do in-car.
    Will keep you posted. Thanks all for the input

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    Solenoid test

    Quote Originally Posted by Mattblack59bus View Post
    Hi Greg.

    The "13" means Open Circuit, "14" would mean Short Circuit or Short to Ground.

    The 8 speed shift lock solenoid is labeled as 9V, so I would assume 10V in enough to operate if it's the same/ similar as the 6 speed.

    Are you able to disconnect the cable where you measured the 10V, and measure the resistance of the solenoid itself? The 8 speed solenoid is roughly 6 ohms.

    I suspect your solenoid has failed.

    Cheers
    Marc
    Hi Marc thanks for your input I really do appreciate it. Well I pulled the shifter out and got into the solenoid, it is 12v different to yours. Anyhow did a ohms test and at 2K on the DMM 0.021 or if I change the scale to 200 I got 20.9 ohms. So to me and going by yours you'd think its stuffed??? Well while totally unplugged I powered it from a car battery and no probs worked immediately!!! Whats your thoughts on it now Marc?
    Went back to wiring and red #9 which goes to solenoid has only 2.9v but unplugged 10.5v. Makes no difference if brake on or off. That was using the car as and earth. If I use #10 yellow the neutral wire to the solenoid I get nothing.
    Thinking TCM as have tried a different brake switch already.
    Whats your thoughts?
    Cheers to all
    Greg
    Attached Images Attached Images

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    Additional fault code

    Quote Originally Posted by gregstevens67 View Post
    Hi Marc thanks for your input I really do appreciate it. Well I pulled the shifter out and got into the solenoid, it is 12v different to yours. Anyhow did a ohms test and at 2K on the DMM 0.021 or if I change the scale to 200 I got 20.9 ohms. So to me and going by yours you'd think its stuffed??? Well while totally unplugged I powered it from a car battery and no probs worked immediately!!! Whats your thoughts on it now Marc?
    Went back to wiring and red #9 which goes to solenoid has only 2.9v but unplugged 10.5v. Makes no difference if brake on or off. That was using the car as and earth. If I use #10 yellow the neutral wire to the solenoid I get nothing.
    Thinking TCM as have tried a different brake switch already.
    Whats your thoughts?
    Cheers to all
    Greg
    Hi Guys put it all back together and ran scan tool again and got same fault plus a new P0929-14 Gearshift lock solenoid circuit range performance.
    Really appreciate any input???

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    Quote Originally Posted by gregstevens67 View Post
    Hi guys, would appreciate any input on the above. Gearshift solenoid has locked the shifter and when hitting the brake doesn't actuate, if I overide the solenoid and use the release under the cup holder its harsh going into reverse and then driving its stuck in 3rd. Checked gearshift solenoid plug #9 positive and #10 neutral and have 10 volts regardless of brake pedal pushed ignition on or off. Plug to mechatronics is in correctly and wiring is all good. Vehicle has done 140,000ks.
    Any ideas and does anyone know what the 13 represents after the fault code? P0928-13
    Cheers Greg.
    Just a thought, there’s also a reverse solenoid in the valve body, plus a solenoid for each gear of course At 140K kms have you flushed the transmission? It could be that one of the solenoids in the VB has failed or is blocked up with gunk. The TCM will limit gear selection to protect the clutch packs from incomplete gear selection

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    Yes I have flushed it out over several times approximately 32 litres now and pan filter conversion.

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