Go Back   The 75 and ZT Owners Club Forums > The 75 and ZT Owners Club Forums > Technical Help Forum
Register FAQ Image Gallery Members List Calendar Mark Forums Read
Notices

Reply
 
Thread Tools Display Modes
Old 8th January 2017, 12:31   #1
drewbie
Loves to post
 
drewbie's Avatar
 
Rover 75 Club SE 1.8T 03 plate.

Join Date: Jan 2009
Location: Tenterden
Posts: 277
Thanks: 28
Thanked 41 Times in 37 Posts
Default Air bag light

Approximately one in every twenty starts my air bag light will remain on. In the past when it has been permanently on I have cut out all the under seat connectors and crimped them together and have also replaced the clock spring. Can anyone suggest what would be best to look at next, side impact sensors connections maybe?
drewbie is offline   Reply With Quote
Old 8th January 2017, 12:40   #2
SD1too
Doesn't do things by halves
 
SD1too's Avatar
 
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model.

Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,265
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
Default

Soldering is more reliable than crimping Andrew. Failing that, ask a club T4 owner to call in. In about fifteen minutes you'll find out exactly where the problem lies (mine was a surprise: a wire shorting to earth due to insulation damage).

Simon
__________________
"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.
SD1too is offline   Reply With Quote
Old 8th January 2017, 13:45   #3
drewbie
Loves to post
 
drewbie's Avatar
 
Rover 75 Club SE 1.8T 03 plate.

Join Date: Jan 2009
Location: Tenterden
Posts: 277
Thanks: 28
Thanked 41 Times in 37 Posts
Default

Thanks for your answer SD1too, in your case was it one of the wires under the seats that was damaged?
drewbie is offline   Reply With Quote
Old 8th January 2017, 17:21   #4
SD1too
Doesn't do things by halves
 
SD1too's Avatar
 
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model.

Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,265
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
Default

No, it was in the passenger footwell behind the carpet just beside the door opening. The T4 reported a short circuit and Phil eliminated all the components which just left the wiring.

Simon
__________________
"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.

Last edited by SD1too; 8th January 2017 at 17:24..
SD1too is offline   Reply With Quote
Old 8th January 2017, 21:25   #5
kc13661
I really should get out more.......
 
Freelander Td4

Join Date: Jan 2013
Location: Gateshead
Posts: 2,332
Thanks: 704
Thanked 909 Times in 419 Posts
Default

Sorry if this does not sound helpful, but I had Brian (marinabrian) around my house tonight, and whist he was pottering with his T4 he mentioned his wife's car had the Airbag light on, so he plugged his T4 into the car and ran a diagnostic on the Airbag system, this took less than two minutes, the result was it told him exactly which connector was at fault, this coincided with a job he had recently done on the car

So Brian went straight to the indicated sensor, pulled them apart, cleaned and re-assembled, all in less than 5 minutes

Really what I am trying to say to people, is the club has T4 guys, if you have one local.... use him saves a lot of work and unnecessary guessing
__________________
-------------------------------------------------------------------

Growing old is compulsory.... Growing up is Optional
kc13661 is offline   Reply With Quote
Old 9th January 2017, 07:11   #6
drewbie
Loves to post
 
drewbie's Avatar
 
Rover 75 Club SE 1.8T 03 plate.

Join Date: Jan 2009
Location: Tenterden
Posts: 277
Thanks: 28
Thanked 41 Times in 37 Posts
Default

I do take your point Kc, but surely even a T4 is not going to find a fault if at the time its not manifesting.
drewbie is offline   Reply With Quote
Old 9th January 2017, 09:41   #7
SD1too
Doesn't do things by halves
 
SD1too's Avatar
 
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model.

Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,265
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
Default

In many cases a fault code is stored in the vehicle's memory Andrew even though the problem might be intermittent. Why not send a PM to Chris in Portsmouth and ask?

Simon
__________________
"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.
SD1too is offline   Reply With Quote
Old 9th January 2017, 13:12   #8
genpk
Posted a thing or two
 
Rover 75 Saloon MGZT

Join Date: Jul 2012
Location: Perth, AUSTRALIA
Posts: 1,662
Thanks: 3
Thanked 461 Times in 299 Posts
Default

Only ever had the airbag light on twice,both in different cars.
I found the car which had a light that came on and off at different times was the connectors under the drivers seat.
The other one where the light was on constantly was the airbag sensor under the carpet, under the front drivers seat.
This sensor gets affected if the car has had some sort of water leak in the floor area.
Took the seat out,cleaned the connectors and all fixed.
Appears these are the sensors that seem to cause the most issues.
genpk is offline   Reply With Quote
Old 9th January 2017, 20:21   #9
marinabrian
 
marinabrian's Avatar
 
MG ZT

Join Date: Jan 2011
Location: Newcastle Upon Tyne
Posts: 20,151
Thanks: 3,565
Thanked 10,837 Times in 5,718 Posts
Default

Quote:
Originally Posted by drewbie View Post
I do take your point Kc, but surely even a T4 is not going to find a fault if at the time its not manifesting.
It does, as the stored fault events are there for all time until cleared, even if the system is fully operational and fault free at the time of reading the SRS DCU memory.

In the case of intermittent faults, the fault memory can be cleared, and then once the fault reoccurs, the SRS DCU can be read to see what the latest fault cause is.

In the case of my wife's car, it was the driver's side thoracic airbag, or to be more exact my size eight steel toecaps poked under the seat and knocking the connector for six when removing the rear seat cushion to mop out the water from the boot leak.

This is the first SRS malfunction in over four years, when I installed the PPD leather seats.

Brian
marinabrian is offline   Reply With Quote
Old 16th January 2017, 10:18   #10
drewbie
Loves to post
 
drewbie's Avatar
 
Rover 75 Club SE 1.8T 03 plate.

Join Date: Jan 2009
Location: Tenterden
Posts: 277
Thanks: 28
Thanked 41 Times in 37 Posts
Default

Does anyone know of any reader on the market, other than T4, that can interrogate our SRS DCU system. The hand held I have at the moment can only diagnose engine fault codes.
Just done a search and found this, pscan.eu, id be very interested to hear from anyone who's used one.

Last edited by drewbie; 16th January 2017 at 10:54.. Reason: Further info
drewbie is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 05:30.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright © 2006-2023, The Rover 75 & MG ZT Owners Club Ltd