Corolla DCM communication module activation failed

[Farman]

On 4/29/2022 at 6:31 PM, flash22 said:

You need to bypass the microphone link pins 18 to 34 and 19 to 35

we are a UK based forum, it would be appreciated if you would post in English

Thanks dear you mean the same pin numbers as shown here ?

[flash22]

yes the same as you did for the speaker

[Farman]

15 minutes ago, flash22 said:

yes the same as you did for the speaker

That would be great but I have another problem my microphone has been removed from the roof headlight( beside SOS switch) I want to bypass wires there to simulate microphone , or connect other non toyota microphone to it.

Please if you have an idea let me know

[Mohd]

On 2/28/2022 at 4:40 PM, Farman said:

I have a problem telematics DCM with my toyota corolla 2020 LE made in USA.

Which is Iam outside USA using this car for 5 months. recently the problem appeared which is when i start the car i hear sound says "Communication module activation failed please make sure you are in area with good Cellular coverage and try again, if you continue hear this message plz contact the dealer".

Regarding LED indicator lights beside the SOS after some flickering Red will remain continously.

I don't know if related or not Previously Headunit Entune Wifi hotspot was not working but was trying to connect but now it says you need active subscription when i press the hotspot.
So is there any relation that it might be some kind of subscription that has been ended thats why even DCM is not connecting anymore?

Also RSA feature "Road sign assistant" has not worked since i purchased the car!.

Fo your knowledge, The DCM and SOS feature is not working outside USA and I dont want to connect it to data center just want to deactivate it without right front speaker being lost! Or make other problems to the car.

i have tried pulling out the 7.5A myday fuse but it bcz of the speaker lose cant be done. Also dont want to open DCM module and rewire it.

please anyone has knowledge how to deal with it from to fix it outside USA.

there is no authorized dealer here to visit them.

Can any one please help me to stop the voice of "Communication module activation failed please make sure you are in area with good Cellular coverage and try again, if you continue hear this message plz contact the dealer" in my Corolla car.

[Farman]

On 9/11/2022 at 5:39 PM, Mohd said:

Can any one please help me to stop the voice of "Communication module activation failed please make sure you are in area with good Cellular coverage and try again, if you continue hear this message plz contact the dealer" in my Corolla car.

Hello dear plz follow my steps it will solve your issue 100%

https://youtu.be/g7xS3uPCBJA

[Farman]

On 4/29/2022 at 6:31 PM, flash22 said:

You need to bypass the microphone link pins 18 to 34 and 19 to 35

we are a UK based forum, it would be appreciated if you would post in English

DEAR,

I have bypassed these 4 pins now bluetooth started to work but microphone still doesnt work any other idea? Can you put picture of correct diagram ?

Thanks

[flash22]

Didnt you say you did not have the mic installed, it needs to be the correct type

On 5/1/2022 at 12:25 PM, Farman said:

That would be great but I have another problem my microphone has been removed from the roof headlight( beside SOS switch) I want to bypass wires there to simulate microphone , or connect other non toyota microphone to it.

Please if you have an idea let me know

 

[Farman]

16 minutes ago, flash22 said:

Didnt you say you did not have the mic installed, it needs to be the correct type

 

Yes but we have tested in another vehicle 

18 & 34
19 & 35

Bypassed , alongside other two basic pins which were already bypassed in the first step.

Please have a look at the diagram.

Any other idea? 

 

[flash22]

same problem on both cars ?

[Farman]

Just now, flash22 said:

same problem on both cars ?

Plz look at this one too,

I think the above one pin numbers not true may be this one right one?

They are in different locations if you look at 18 ,19 ,34,35!

 

[flash22]

this one is the socket view or wire side of the plug

 

this is the view of the front of the plug (mirror image of the socket)

[Farman]

11 minutes ago, flash22 said:

this one is the socket view or wire side of the plug

 

this is the view of the front of the plug (mirror image of the socket)

 

 

 

So the above one is the one we work on it and bypassings are correct? 

So why mic didnt start to work? 

[flash22]

do you have a picture of the bypass on your car ?

[Farman]

10 minutes ago, flash22 said:

do you have a picture of the bypass on your car ?

Here is the bypassed on + the socket pins in the above comment

[flash22]

From that view

[Farman]

4 minutes ago, flash22 said:

From that view

I did the same with no chance!

Any how many many thanks for your help 

Appreciate so much

[flash22]

Check the mic in the roof

[Farman]

3 minutes ago, flash22 said:
Check the mic in the roof
I Its working if i reconnect DCM module,

I think there is other bypass that should be done might be in small pins i mean other cables.

Plz if you get any idea let me know 
https://www.tochr.net/379/terminals_of_ecu.html

[flash22]

I just checked the full wiring diagram

The mic is powered, on pin 33 that requires 4-6v

check the voltage on F133, pin 5, it should be 4.5-5.5v (ignition on) - if so link it to F134 pin 33

 

[Farman]

1 hour ago, flash22 said:

I just checked the full wiring diagram

The mic is powered, on pin 33 that requires 4-6v

check the voltage on F133, pin 5, it should be 4.5-5.5v (ignition on) - if so link it to F134 pin 33

 

Thats great idea , what about these sending and receiving voices

[flash22]

it's not required, it's the main mic that you need

[James NZ]

This might be a silly question, but I'm in uncharted waters here. When jumping pins in F134 for Mic and Speaker, I understand that the connector is left unplugged from the DCM.

If I need to run power from F133-5 to the Mic power supply at F134-33, do I also leave F133 unplugged from the DCM?

What about the other connectors (A, B, C)? Plugged or unplugged?

 

Thanks! James

[vi2aly235]

Hi. Any luck with Mic start working again?

[Farman]

On 10/13/2023 at 11:07 AM, vi2aly235 said:

Hi. Any luck with Mic start working again?

If you car has smart key system no.

But if it has normal start system yes there is a chance 

[James NZ]

On 10/15/2023 at 7:40 PM, Farman said:

If you car has smart key system no.

But if it has normal start system yes there is a chance 

Hi Farnan

I havent yet got round to unplugging and bypassing the Telematics unit, and jumping power for the mic, are you able to elaborate on the problem with the Smart Key? I have disabled the Telematics unit before by pulling the fuse, and don't think it affected the Smart Key system? ---Although I couldnt swear to it, as soon as I noticed the mic problem, which I anticipated, I reconnected the unit.

Cheers,

James