Thermo Time Switch

[teahead]

Well...I installed the new TTS and still, no power going to the cold start valve (CSV) while cranking.


Guess I gotta do more testing.

[jpringot]

Hello
In this thermo swich on ebay with connector
where is the w and the g? or on the connector ev1 red or black ?

[teahead]

Hello
In this thermo swich on ebay with connector
where is the w and the g? or on the connector ev1 red or black ?

You're talking about the switch 91161711700?

It's labelled.  Can't miss it.  As aforementioned, you take off those pegs that are on there and install the screw hole nuts.  Very easy.  W & G are labelled.

[Figoulu]

Hi gents

I'm having trouble with my TTS and puzzled about the prices of such a device

Searching on the net I found a possible part that could fit: https://vdo-webshop.nl/en/temperature-switches/825-vdo-temperature-switch-35c-m14-4103590689283.html
 
But as you may have seen only one connection is available while I have 2 cables
I was wondering wether the ground cannot be inserted between the washer and the thread ?
Would it work like that ?

Thanks !

[mnahon]

Hi Figoulu,

That switch is quite different in function. It will simply turn on or off at 35C.

The function of the TTS on our cars is more complicated. It's intended to energize the cold start valve for a duration of time. When the engine is cold, that duration is ~5-10 secs. The duration decreases as the coolant temperature increases. Eventually, at around 35C, the duration drops to zero.

You can find, in the technical manual, a more detailed description:
https://www.sl113.org/wiki/Restricted/Engine-starting-aid-tour

[Pawel66]

There were numerous threads about replacements of various types. Of course you can find original replacement, it will be horrifyingly expensive.

I used the modern Bosch Bosch replacement as shown on attachment. Part number will be e.g. F026 T030102. And connectors - at the bottom of the table.

[Figoulu]

Thanks Pawel
Still 130€ appeared high enough to find an alternative…
I understand it’s not really possible to spend less 😅

[Figoulu]

There were numerous threads about replacements of various types. Of course you can find original replacement, it will be horrifyingly expensive.

I used the modern Bosch Bosch replacement as shown on attachment. Part number will be e.g. F026 T030102. And connectors - at the bottom of the table.

Additionally Pawel, considering the small differences between 100, 101, and 102, can i freely go for one of these without any issues ?

[Pawel66]

I think indeed that it would be difficult to spend less...

They are the same in terms of dimensions. I do not remember which one I have, I think 102 and it works very well. It is important during hot start when you have your car tuned so that it does not run too rich, spark plugs being light tan. Then hot start may be an issue.

Just my opinion.

[Figoulu]

I think indeed that it would be difficult to spend less...

They are the same in terms of dimensions. I do not remember which one I have, I think 102 and it works very well. It is important during hot start when you have your car tuned so that it does not run too rich, spark plugs being light tan. Then hot start may be an issue.

Just my opinion.

Having read the starting aid topic, the right timing on my TTS is finally 9.5s
So 101 is the most accurate while the other ones are not totally out of the scope…

[Figoulu]

Found one on ebay

NOS for 110€ postage included…
Ref is 100 which apparently is equivalent to 102

[Pawel66]

Excellent!

I bought mine a couple of years ago form Bosch service nearby, just ordered via email.

[Figoulu]

Excellent!

I bought mine a couple of years ago form Bosch service nearby, just ordered via email.

I checked before all, but they are no more providing stocks on those refs

[Pawel66]

I checked before all, but they are no more providing stocks on those refs

I see, good to know...

[MarkCan]

It is with pleasure that I’m reading this thread. Finally something that I need for my rebuild is in the parts lot and appears to be in good working order. 👍

[Pawel66]

That is a money and trouble saver if so !

[Jean-Philippe Ringot]

Bonjour,

Je viens d'acheter le thermo time switch Réf.: F 026 T03 101 quelqu'un peut il me dire le branchement sur les cosses du fil rose/bleu et le fil rose ? Merci

[Peter van Es]

I have just bought the thermo time switch Ref.: F 026 T03 101 can someone tell me the connection to the terminals of the pink/blue wire and the pink wire? Thank you

Check this: https://www.sl113.org/wiki/Engine/ThermoTimeSwitch
Item 32 on the wiring diagram: https://www.sl113.org/wiki/Restricted/ColorWiringDiagrams
Pink (rose) goes to W
Pink/Blue goes to G

[Pawel66]

Bonjour,

Je viens d'acheter le thermo time switch Réf.: F 026 T03 101 quelqu'un peut il me dire le branchement sur les cosses du fil rose/bleu et le fil rose ? Merci

You have the drawing of the connectors of the new TTS in reply no. 31 in this thread.
Pink/blue to plus (G on the old TTs).
Pink to signal (switch symbol, W on the old TTS).

[Jean-Philippe Ringot]

Merci beaucoup ! J'ai pris le BOSCH F 026 T03 101 pour ma 280sl/8 1968 ! Ai je fais le bon choix pour ma pagode ? Merci

[mauro12]

Hi guys , just a quick word about this tts .
I was checking on eBay and the size seems to be higher and the probe smaller in size . There is no risk of touching the coolant pipe with the terminal connectors ? Can you post a picture of this sensor in your car ? Thank you

[mauro12]

Any help from somebody ? i guess this type of sensor is good but maybe some modifications are needed , like it seems to be much higher that the original and the wire connection is very close to the coolant pipe above . Any pictures ? thank you

[Figoulu]

Hi all

I'm about to plug my TTS but the electrical connector provided with the bosch part need to replug the original connector

Anybody knows the type of connector (Iso ?) that I need to purschase to match Bosch plug ?
Thanks

[BobH]

Hello, the part numbers for the connector are on this thread if you have a look back at earlier posts

There's a picture and instructions on here

https://www.sl113.org/wiki/Engine/ThermoTimeSwitch?action=download&upname=W113%20Cold%20Start%20Thermo%20Time%20Sensor%20Alternative%20rev%201.pdf

[Figoulu]

Hello, the part numbers for the connector are on this thread if you have a look back at earlier posts

There's a picture and instructions on here

https://www.sl113.org/wiki/Engine/ThermoTimeSwitch?action=download&upname=W113%20Cold%20Start%20Thermo%20Time%20Sensor%20Alternative%20rev%201.pdf

Ohhhh thanks and sorry 👍👍