Electric issue

[ajl]

Hey all,

I have a weird electric issue in my Boxster 987 II.
When I start the car in the morning regardless of the temperature outside the front fans start working.
When I drive the car and stop a 7.5 fuse blows (see image attached) and it's the same one all the time. Then an error "Drive off assist failure" shows on the dashboard. (I learned that this particular fuse is responsible for drive assist, air con and some other functions in the car)
At first, I thought it was a faulty USB cable I used and once removed everything was okay for a while but now it happens again.

Does anyone have any idea what can be the cause?

Thanks,
Avy

 

[richardjjs1]

Check for water ingress into the cabin
Water behind seats indicates tat the drain holes behind the hood are blocked
Damage to Control Unit

Water in foot wells indicates blocked drain holes by battery
AND/OR possible your air-condition pipe that runs down the inside of the passenger footwell has come out
Have a look at these first

 

[Motorhead]

Avy,

According to this fuse listing (albeit for a 2007 Cayman S) Row 3 Fuse 2 covers a number of items including the Klimatronic Control Unit (and the Refrigerant Pressure Sensor?) which may be responsible for your problem.

https://www.porscheclubgb../forum/tm.aspx?m=721338

As with most electrical problems I think you're going to need a Porsche-specific diagnostic check to find the source of the issue.

Jeff

 

[ajl]

richardjjs1 Thank! I'll look into it. To be honest I didn't notice any wet areas in the car but, it make sense, when it's no raining and the car is dry it drives with no issue.

 

[ajl]

Avy,

According to this fuse listing (albeit for a 2007 Cayman S) Row 3 Fuse 2 covers a number of items including the Klimatronic Control Unit (and the Refrigerant Pressure Sensor?) which may be responsible for your problem.

https://www.porscheclubgb../forum/tm.aspx?m=721338

As with most electrical problems I think you're going to need a Porsche-specific diagnostic check to find the source of the issue.

Jeff

Thanks Jeff,
I'll try Richard's idea and if it's not that I will probably take it to Ninemeister to be checked.

 

[richardjjs1]

Fuses on 987 seem to vary even on model year and Boxster/Caymen.
Check behind the passenger seat for water. A friend had this problem recently and is booked in tomorrow for a new ECO (Climate Control) and 2 keys at OPC Wolvs. 900.00. Good price
Easy fix but I had the air con drain pipe problem on my 987 (2007) when I got the Air Conditioning working

 

[ajl]

Fuses on 987 seem to vary even on model year and Boxster/Caymen.
Check behind the passenger seat for water. A friend had this problem recently and is booked in tomorrow for a new ECO (Climate Control) and 2 keys at OPC Wolvs. 900.00. Good price
Easy fix but I had the air con drain pipe problem on my 987 (2007) when I got the Air Conditioning working

I checked behind the passenger seat and underneath it and it looks dry. I've also looked at the hood water drain holes and they don't seems blocked.
The fuse box area is dry as well and the battery surrounding is fairly dry too.
The air con is off so I don't think is that either.

 

[Motorhead]

Avy,

Since you've turned off the aircon I wouldn't expect the fans to be running immediately on start-up. It does sound as though it's an electronic climate control module problem if the fuse keeps blowing - Ninemeister should be able to sort it out for you.

Good luck..!

Jeff

 

[ajl]

Avy,

Since you've turned off the aircon I wouldn't expect the fans to be running immediately on start-up. It does sound as though it's an electronic climate control module problem if the fuse keeps blowing - Ninemeister should be able to sort it out for you.

Good luck..!

Jeff

Why the fans should be running immediately on start-up? the AC is off.
The truth is I have no idea whats wrong. I replaced the blown fuse with a new one, started the car with AC off, PCM off and set in the car for 10-15 mins nothing happened. I drove the car for less then 1 min and the fan start running again. I stoped the car and the fuse is blown! Is it possible that something wrong with the ABS/PSM control unit?

Thanks

 

[Motorhead]

Avy,

I assume you have climate control rather than the standard manually controlled aircon? I've no idea what's happening but I would imagine that the electronic climate control module is "live" even if you switch off the aircon and the auto aircon function.

It's a bit pointless speculating; you're just going to have to bite the bullet and run some diagnostics to find what's at fault. Ninemeister should have the necessary diagnostic equipment to sort you out but, as Richard has pointed out, don't expect any Porsche electronic module to come cheap..!

Hope you get it sorted.

Jeff