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Old 5th June 2016, 17:22   #1
Ravinder
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Default Broken down - Inertia switch? (UPDATE)

Hi guys

I quickly popped out in the car. When reversing the car just cut out and hazards came on and I got a message on the display saying Inertia switch. Now, the car won't start at all. Can anyone help me diagnose the issue and how to fix it? Many thanks.

Last edited by Ravinder; 9th June 2016 at 10:48.. Reason: update
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Old 5th June 2016, 17:25   #2
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Hi guys

I quickly popped out in the car. When reversing the car just cut out and hazards came on and I got a message on the display saying Inertia switch. Now, the car won't start at all. Can anyone help me diagnose the issue and how to fix it? Many thanks.
open the passenger foot well fuse box cover, up on the left in the inner door post is the switch, a small black jobbie... push in the button on top...
Also check the lead going in is good and tight....
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Old 5th June 2016, 17:46   #3
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Thanks. I can't seem to find the switch. I've got the black panel half off but struggling to see up it. I'll keep looking.
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Old 5th June 2016, 18:27   #4
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Thanks. I can't seem to find the switch. I've got the black panel half off but struggling to see up it. I'll keep looking.
If you take put the glove box it will be easier
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Old 5th June 2016, 18:29   #5
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It's exactly where have been told, once you reset it you might find the UBP has failed I had it myself one night..
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Old 5th June 2016, 18:35   #6
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If it's on your diesel Rav, check your plenum isn't flooded
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Old 5th June 2016, 19:08   #7
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Thanks. Plenum was clear when checked about a week or so ago. Still can't find it and I have no tools. I've called the AA now. I hope the fuel pump hasn't gone.

What would cause the inertia switch to trigger, if that's what it is? And is it likely to happen again? I want to prevent this from happening in future. Thanks.

Last edited by Ravinder; 5th June 2016 at 19:18..
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Old 5th June 2016, 19:22   #8
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Thanks. Plenum was clear when checked about a week or so ago. Still can't find it and I have no tools. I've called the AA now. I hope the fuel pump hasn't gone.

What would cause the inertia switch to trigger, if that's what it is? And is it likely to happen again? I want to prevent this from happening in future. Thanks.
its designed to cut off the fuel pump in case of a crash, it is reset easily enough although you may need thin arms to get up the left side of the glovebox...

if the plug comes loose then it will also cut out and show as failed...
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Old 5th June 2016, 19:29   #9
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After fault finding an electrical fault a few weeks back I too struggled to see anything in the fusebox in the passenger dark foot well, There's now an LED torch in my glove box
Hope it's an easy fix & get it sorted Ravinder.
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Old 5th June 2016, 20:18   #10
Ravinder
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Hi guys

AA man has just left. He has checked the inertia switch and it is already down position and hasn't tripped.

He then checked the under bonnet fuel pump and he suspects this is the issue. He also plugged his diagnostic machine in and its coming up with an error regarding fuel pump and pressure.

So, is it likely that the under Bonnet fuel pump is the culprit? Could it be the other pump at the rear?

Many thanks.
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