Where does this blue connector goes to?

[aslan]

I noticed this unused connector under my steering. It's not the CEM's connector as the CEM has all its connectors accounted for.

Tracing this connector, it joins into the same harness that connects to the accelerator pedal sensor. The accl pedal sensor is seen in the pic - at 2 o'clock.



I have a few error messages on the XC and not sure if this is related. It's difficult to see down there but I can't see any obvious point where it's supposed to go to.

Thanks

[SwissXC90]

Originally Posted by aslan

I have a few error messages on the XC and not sure if this is related.

What are the errors?

What is the recent history leading up to the event where the connector mysteriously appeared hanging down from the dash?
Was any work done? What? Where?

How many pins on the connector?
How man rows? pins per row?
This helps identify it with the wiring diagram.

What model year XC90? To look things up on the wiring diagram we need to know what MY.

Without the information above I can only rely on guesswork, and my guess is it is the connector for the optional CAN-bus controlled coffee machine that integrates with the dashboard.

[aslan]

Originally Posted by SwissXC90

What are the errors?

What is the recent history leading up to the event where the connector mysteriously appeared hanging down from the dash?
Was any work done? What? Where?

How many pins on the connector?
How man rows? pins per row?
This helps identify it with the wiring diagram.

What model year XC90? To look things up on the wiring diagram we need to know what MY.

Without the information above I can only rely on guesswork, and my guess is it is the connector for the optional CAN-bus controlled coffee machine that integrates with the dashboard.

Hi. Thanks very much for the reply. My model is a 2009, same year as yours but yours is a R. We didn't get any R over here.

Sorry for not giving any intro. It's a bit longish. I had an issue with my wiper. CEM was faulty and I removed it to send it over to Xemodex. I reinstalled the repaired CEM. Wiper issue is now resolved. I feel like kicking myself for not noticing this connector when removing the CEM. But I removed it at night as I was rushing to have it couriered over to Canada the next morning.

Anyway, I've verified that all connectors to the CEM are in place. Two above. One at the back - similar blue but longer. And two at the front.

I'm having a few error messages I'm trying to sort out

'gear selector service required' TCM 0094
http://www.volvoforums.org.uk/showthread.php?t=251419

'SRS service' no communication with front sensors
http://www.volvoforums.org.uk/showthread.php?t=96421

'brake service required' CEM-1A5F communication with BCM control module signal missing
This I think is due to a dead ABS module and pump as I've had the brake service message intermittently for a few months before the CEM repair. And the day before removing the CEM the 'brake failure' message was permanently on for a whole day. I have power from CEM going to the BCM.

And an alarm system service which is due to the siren. This is of low priority as I had a similar issue with my old S80. Probably a dead siren battery.

Here's a pic of the connector. I showed this to my usual shop. They said it may be a connector to the on board Nav that pops up out of the dash. (I don't have it)

[SwissXC90]

Facts:

36p grey connector
Located under steering wheel
Wire colours noted:
Green with orange stripe
Green
Green with white stripe
Grey

Reading the Connectors section of the Wiring diagram, we find the following 36p connectors:

54/3.1 36-pin gray From Passenger compartment harness to Engine compartment harness

This is the only 36p connector in the entire vehicle

The connector carries signals to and from the engine, front airbag sensors, brake control module, body stability module, gear selector module, transmission control module and more.
There must be a connecting point on the firewall

With this connector unplugged I expect you would have a multitude of errors

The connector can be verified if you remove the shell, identify the pin numbering, and note the wire colours of the first row of pins.
This will allow for 100% positive identification.

Example for pins 1-5 on connector 54/3.1:
Pin 1 Orange to 7/179 front crash sensor
Pin 2 Orange/Black to 7/179 front crash sensor
Pin 3 Orange to 7/178 front crash sensor
Pin 4 Green/Orange to 7/178 front crash sensor
Pin 5 Green/White to 4/28 Transmission control module

etc

[SwissXC90]

The nav display 16/46 Multimedia display has a blue 5p connector for power and ground, and a 10p brown connector for video and data signals

[aslan]

SwissXC90, heaps of thanks!!

You've nailed it spot on. After spending many minutes under the dash looking finally found where it's supposed to go to. It was pretty obvious but the Xemodex youtube vid I used as reference lacked that connector. (actually it's there in the vid but not connected)

https://youtu.be/U8UozG9qLvM

When I removed the CEM this was what it looked it.



The blue connector to that gray side connector wasn't there. Probably knocked loose as I was manipulating the CEM out.

This is with the new CEM. The mating connector above. Staring at my face ...



Plugged it in tonight



I haven't had the time yet to connect VIDA but so far these messages have disappeared

Brake system service
Alarm system service
Gear selector service

What's still present are the SRS message and a new Engine Malfunction.

[aslan]

Just one last piece of mystery. I discovered another connector. It's on the same harness with the 36-pin. The terminals looks like for a relay but I may be wrong.





The wires to it are short and nothing close by I could see matches it. Now where does this goes to?

[SwissXC90]

Originally Posted by aslan

I haven't had the time yet to connect VIDA but so far these messages have disappeared

Brake system service
Alarm system service
Gear selector service

What's still present are the SRS message and a new Engine Malfunction.

It is a credit to Volvo's engineering that you still managed to run the vehicle with the engine loom connector disconnected!

The SRS message does not automatically clear, you need to clear it in VIDA

Your next steps are to clear all errors in VIDA and see what returns when you run the engine and drive around the block.

[SwissXC90]

Originally Posted by aslan

Just one last piece of mystery. I discovered another connector. It's on the same harness with the 36-pin. The terminals looks like for a relay but I may be wrong.
The wires to it are short and nothing close by I could see matches it. Now where does this goes to?

Looks like a relay socket for some option.

Please identify the wire colors or take a photo showing the wire colours, then I can trace the wires on the wiring diagram and tell you what it is.

It is possible it is taped back to the loom because it is unused. (In which case you don't need to worry about the connector)
You can cut the tape to give you more room to move the connector for a good photo, and then i can identify it for you.

[aslan]

Originally Posted by SwissXC90

Looks like a relay socket for some option.

Please identify the wire colors or take a photo showing the wire colours, then I can trace the wires on the wiring diagram and tell you what it is.

Thanks