[[email protected]]

the r has no boost and the water temp gauge is not movin. plenty of heat out of the vents. drives fine otherwise.

I tried restarting twice. no idiot lights or messages.

ideas?

 

[bschurr]

Re: no boost & no water temp gauge ([email protected])

Chris -
I would start with pulling the 6 & 23 fuses and if that doesnt work for the ECU reset check the other individual fuses. If still no luck I would look around for any loose wires, connectors or fittings...

After that it would be the ole code reader & trip to the dealer...

good luck http://********************/smile/emthup.gif

 

[R Salesman]

Re: no boost & no water temp gauge ([email protected])

The engine temperature coolant sensor is bad and needs to be replaced. It's telling the ECU that the engine is overheating, and thus the ECU sets the vehicle into limp-home mode.

Resetting the ECU may help . . . but then you're running the risk of potentially erasing a stored DTC that is there for a reason. If you erase it, the vehicle may run properly, but on a faulty signal from the ECT. In other words, there is the potential that the engine could be overheating, but the ECT is telling the ECU it's not . . . and that would obviously be a VERY bad thing.

Sometimes DIY isn't the best way to go. Take it to your retailer and let them fault trace it.

 

[JimLill]

Re: no boost & no water temp gauge (R Salesman)

The fact that there is no idiot lights at all points to something other than a sensor. I'd look at the CEM connectors.

 

[Our R]

Re: no boost & no water temp gauge (JimLill)

This post from me will be no help what so ever, it's just to make you laugh.

Maybe it's the mirror covers, the reflection from the sun is getting into your eyes, keeping you from seeing the idiot lights.

Installing the covers, you didn't pinch a wire, causing a fuse to blow, did you?

 

[blot]

I had my IAT sensor go screwy on me once. No check engine light or error messages in the DIM. All that happened was that the car just lost boost, accelerated very slowly and the radiator fan was running at full blast.

As I had may Auterra with me, it showed that a code was thrown. Basically, the IAT gave a max temp of 105degC and the ecu just cut back on everything to try to cool the car down. Once I had cleared the code, everything was back to normal. The code never re-appeared again... I chalked it down as one of those one-offs...

 

[R Salesman]

Re: no boost & no water temp gauge (JimLill)

Quote, originally posted by JimLill »

The fact that there is no idiot lights at all points to something other than a sensor. I'd look at the CEM connectors.

Although this is typically true (when a sensor fails, a warning light comes on), I've personally seen this situation occur on R's several times. So from previous experience with situations like what was described in the initial post, my educated guess is that it's the ECT sensor.

Also, it's entirely possible that a code has been stored, but it isn't something that the vehicle passes on to the consumer as a warning light. I see DTC's stored all the time that aren't visible to the consumer.

Anyways . . . we'll find out what the problem is soon enough.

 

[JimLill]

Re: no boost & no water temp gauge (R Salesman)

I interpreted it as NO idiots lights... at start up... thus CEM thought

 

[Our R]

Re: no boost & no water temp gauge (JimLill)

My other post was a joke but this is not.
The outside air temp sensor is in the mirror and the input from this is used for engine managment. Did a wire to that sensor get unhooked in your mirror cover install?

 

[[email protected]]

Re: no boost & no water temp gauge (Our R)

Quote, originally posted by Our R »

This post from me will be no help what so ever, it's just to make you laugh. Maybe it's the mirror covers, the reflection from the sun is getting into your eyes, keeping you from seeing the idiot lights. Installing the covers, you didn't pinch a wire, causing a fuse to blow, did you?

haha -- you know there were two small wires attached to the back of the mirror glass.

 

[[email protected]]

Re: no boost & no water temp gauge (R Salesman)

Quote, originally posted by R Salesman »

The engine temperature coolant sensor is bad and needs to be replaced. It's telling the ECU that the engine is overheating, and thus the ECU sets the vehicle into limp-home mode.

I spoke with my service advisor and he said the same thing. Mentioned they've had a few go bad.

Since the windows were tinted and I can't put them down for a couple days AND a certain someone at the house insisted I attend to her to do list this weekend, I dropped it off at the dealership for them to look at Monday.

 

[bschurr]

Re: no boost & no water temp gauge ([email protected])

so...
how's the baby?

 

[[email protected]]

Re: no boost & no water temp gauge (bschurr)

sensor is bad- part should be in Tues. AM

 

[Our R]

Re: no boost & no water temp gauge ([email protected])

Which sensor?

 

[pizzapizza]

Re: no boost & no water temp gauge (Our R)

YOU NEED SOFTWARE!!!!!

 

[JRL]

Re: no boost & no water temp gauge (pizzapizza)

Quote, originally posted by pizzapizza »

YOU NEED SOFTWARE!!!!!

You're a noobie who speaketh without knowledge of Volvo

 

[pizzapizza]

Re: no boost & no water temp gauge (JRL)

dare to place a wager???

 

[JRL]

Re: no boost & no water temp gauge (pizzapizza)

Quote, originally posted by pizzapizza »

dare to place a wager???

In THIS instance, yes

 

[pizzapizza]

Re: no boost & no water temp gauge (JRL)

I don't want to take your money......reference TNN 28-67.

 

[JRL]

Re: no boost & no water temp gauge (pizzapizza)

Quote, originally posted by pizzapizza »

I don't want to take your money......reference TNN 28-67.

I'll get back to you on this...