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Topic: Tracing seat belt pre-tensioner fault (Read 746 times) |
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Lucien
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Electrics R Us!
Posts: 23
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Tracing seat belt pre-tensioner fault
« on: Sep 21st, 2011, 8:23pm » |
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We've got a four-flash airbag warning code which indicates a seat-belt pre-tensioner fault. The car is a late R-reg Ultima 24V with side airbags.
Is there a quick way to localise this fault or should I borrow a unit from the other car and test by substitution one at a time? Poking around this system with a multimeter is not recommended otherwise I'd compare the readings at the two connectors under the seats.
Maybe someone knows of a common problem that triggers this fault code?
Lucien
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My other other car is also a Scorpio
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Simmo
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I'm an OAP !
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Re: Tracing seat belt pre-tensioner fault
« Reply #1 on: Sep 22nd, 2011, 6:41am » |
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Have you checked the connections under the seat?. They can get disturbed by the feet of rear seat passengers. 
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Lucien
Newbie
Electrics R Us!
Posts: 23
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Re: Tracing seat belt pre-tensioner fault
« Reply #2 on: Sep 22nd, 2011, 8:38am » |
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Yes, they look OK, no sign of damage to the connectors or wiring loom that I've spotted so far. I wonder whether it's worth just taking the seats out for a closer look?
Lucien
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My other other car is also a Scorpio
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Lucien
Newbie
Electrics R Us!
Posts: 23
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Re: Tracing seat belt pre-tensioner fault
« Reply #3 on: Sep 23rd, 2011, 7:14pm » |
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Before I start swapping these pyrotechnics, please can anyone confirm whether the fault warning (4 flashes of airbag light) will clear by itself after x drive cycles, or whether it has to be reset manually. As I don't think I have any way of resetting it, that would be a problem as I wouldn't know whether I had swapped out the bad unit.
TIA
Lucien
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My other other car is also a Scorpio
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Mike H
Senior Member
Renault Clio
 
Posts: 2594
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Re: Tracing seat belt pre-tensioner fault
« Reply #4 on: Sep 24th, 2011, 1:55pm » |
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Have you tried pulling the under-seat connectors apart and putting them back? Might just be a bad contact.
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Mike H
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Lucien
Newbie
Electrics R Us!
Posts: 23
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Re: Tracing seat belt pre-tensioner fault
« Reply #5 on: Sep 25th, 2011, 12:17pm » |
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Yes, done that, nothing unusual found. Perhaps I should do the same at the control box end of the loom.
Still not sure whether any other steps are required to clear the fault code - any clues?
Lucien
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My other other car is also a Scorpio
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Tompion
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1997 2.3 Ultima estate.
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Re: Tracing seat belt pre-tensioner fault
« Reply #6 on: Sep 26th, 2011, 10:12pm » |
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I’ve had a code from a disconnected drivers airbag, I didn’t have to clear it when reconnected, so presumably the same applies to the pre-tensioner.
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ABS multiplug wheel sensor pins MK IV or MK 20
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