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Thread: Inertia switch

  1. 1st November 2025, 10:30 AM #1
    Paul R
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    Inertia switch

    I have a 2007 DiscoveryTDV6 with a Fault code B1A55-14 (AF) Crash record output circuit short to ground or open. This is supposed to be fixed by resetting the Intertia switch. I cannot for the life of me find this thing and I've taken most of the passenger side behind the glovebox apart. The wiring diagram does not show an inertia switch. Can anyone please tell me if there is one and where the hell it is exactly. If not how to I reprogram ECU.
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  2. 9th November 2025, 08:04 AM #2
    Paul R
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    FYI found a fix in GAP tool to reset Pump. See Service test : PCM Engine: Fuel lift pump reset.

    One down more to go ?
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  3. 10th November 2025, 08:04 PM #3
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    DiscoDB
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    Nicely done - I guess the inertia switch trips the pump, but how did you work out that was the reset needed?
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