Problem with 406 alarm

[ph12]

A couple of time recently on unsetting the alarm first thing in the (cold) morning the LHS indicators have remained on. Setting and unsetting the alarm has cleared it THIS TIME. Anyone know what to look for? Sticking relay perhaps?

TIA

Peter

 

[Jim Mason]

A couple of time recently on unsetting the alarm first thing in the (cold) morning the LHS indicators have remained on. Setting and unsetting the alarm has cleared it THIS TIME. Anyone know what to look for? Sticking relay perhaps?

Sticking relay in alarm ECU. You will pay over £200 for a new circuit board which has about twenty components on it.

It is known fault with the ECU in early 406/306 alarms. It may get worse. My 306's box seem to be ok for a year and now the problem is back big style. In the 306 3 door the box is situated behind the drivers door pillar behind the panel and could be cleared by slapping the rear wing - now even that doesn't work :-(

Does anyone know if the faulty relay can be unsoldered so that the indicators don't flash but still leave the alarm system working?

Got a price second hand of £37 from http://www.sniffydog.co.uk but I'm not sure if these ECU's have to be programmed.

Jim

 

[Fraser (archive)]

Does anyone know if the faulty relay can be unsoldered so that the indicators don't flash but still leave the alarm system working?

Don't see why not, the chances are that the only thing it is used for is the lights, as the relay is used to isolate the alarm from the light circuit. Would need to take a look at the board or schematics to know for sure and see if it's doing anything else (which it might be, esp. if it's an double-pole one).

A better option would be to remove the relay and replace it with the same or a similar one. A normal electronics repair place should be able to do this for you, provide the relay is purchaceable.

I've also cleaned relays in the past and got them working again. Pop of the lid and clean the contacts as well as all moving parts. Use some sort of alcohol electrical cleaning fluid. This might not be possible, depending on how it was made.

Good luck!

Fraser.

 

[Jim Mason]

Don't see why not, the chances are that the only thing it is used for is the lights, as the relay is used to isolate the alarm from the light circuit. Would need to take a look at the board or schematics to know for sure and see if it's doing anything else (which it might be, esp. if it's an double-pole one).

I suspect this relay is used only to flash the indicators.

A better option would be to remove the relay and replace it with the same or a similar one. A normal electronics repair place should be able to do this for you, provide the relay is purchaceable.

I can't find anything that relates to the numbers on the relay so a replacement doesn't look likely.

I've also cleaned relays in the past and got them working again. Pop of the lid and clean the contacts as well as all moving parts. Use some sort of alcohol electrical cleaning fluid. This might not be possible, depending on how it was made.

The relay is tiny and totally sealed so I am going to have a go at removing it and see what happens.

Jim

 

[Jim Mason]

I suspect this relay is used only to flash the indicators.

I can't find anything that relates to the numbers on the relay so a replacement doesn't look likely.

The relay is tiny and totally sealed so I am going to have a go at removing it and see what happens.

Problem solved for now!

Took the box back out and decided to carefully cut open the top of the relay I suspected was causing the problem. This was a very simple relay inside and right away I knew I was in the wrong one. It is a simple single pole on-off without any facilty to supply power independently to near and offside indicators.

The other relay which IS causing the problem is made by Siemens and carries the numbers V23072 - G1061 - A208 and SZY4HD. A quick search on the net revealed a possible replacement at www.relays-r-us.co.uk (the WJ201W).
Data sheet at

http://www.relays-r-us.co.uk/webpages/products/rrus_cat/wj201.htm

I'll check RS Components or Maplin to see if they carry a replacement.

However two or three light taps on the sealed unit seems to have freed it off and it is functioning perfectly. Disconnecting the relay would appear not to be an option as whilst I was refitting the box the alarm started sounding a bleep every 30 seconds. When I checked this out it appears one of the connectors wasn't fully located and wasn't supplying power to the off-side indicators so this is likely to happen if the relay is unsoldered from the board.

Further info on the alarm ECU is that it is manufactured by Texton and carries the following number on the box 962239040-80 and the non-faulty relay 166NC D012-WB44 9508 A and has a fancy letter `F` on the bottom r/h corner.

Jim

 

[Jim Mason]

Problem solved for now!

Took the box back out and decided to carefully cut open the top of the relay I suspected was causing the problem. This was a very simple relay inside and right away I knew I was in the wrong one. It is a simple single pole on-off without any facilty to supply power independently to near and offside indicators.

The other relay which IS causing the problem is made by Siemens and carries the numbers V23072 - G1061 - A208 and SZY4HD.

Further to that RS Components has an almost exact match

http://makeashorterlink.com/?P2B912F36

It mentions a snap-off pin on the top of the relay on the data sheet. The resolution isn't great but i'm sure this hole can be used for washing - is this correct?

Jim

 

[ph12]

Further to that RS Components has an almost exact match

http://makeashorterlink.com/?P2B912F36

It mentions a snap-off pin on the top of the relay on the data sheet. The resolution isn't great but i'm sure this hole can be used for washing - is this correct?

Jim

I feel a bit of a fraud asaking a question and then disappearing for several days leaving everyone else to do the work.....Thanks Jim. Thats very useful. I wouldn't have thought it was a good idea to wash in situ though....how would the fluid get out again? I'd take the immersion cleanable to mean that they are sealed to prevent ingress of anything that would impair the operation of the relay

Peter

 

[Jim Mason]

I feel a bit of a fraud asaking a question and then disappearing for several days leaving everyone else to do the work.....Thanks Jim. Thats very useful. I wouldn't have thought it was a good idea to wash in situ though....how would the fluid get out again? I'd take the immersion cleanable to mean that they are sealed to prevent ingress of anything that would impair the operation of the relay

I can't answer that but I know mine is working correctly know simply with a couple of knocks of the offending relay.

Jim