Problems starting engine in heat

[The Tall Luthier]

I’m wondering if anyone else has had a problem starting the Cali on very hot days.

On three separate hot days, turning the key has had zero affect on the camper van, no lights, no clicks and certainly no engine. Once the sun goes down and things cool off the van starts again, no problems.

The battery has been tested by a battery shop, they refused to replace it.

We used Carista and downloaded all of the errors and uploaded the file to AI to filter out for the days where we had issues starting.

We then chatted to AI about the errors and hot days and it suggested that the Body Control Module, hidden behind the fuse box, behind the headlight switch that could be at fault.

It suggested that perhaps there is a weak connection that becomes too weak because of expansion and contraction in some of the joints.

So my question is I guess, has this happened to you? What was the solution?

 

[sidepod]

As a very basic check you can confirm most of the CAN bus/modules are ok by simply locking/unlocking the door.

Using the remote, unlock the van.
Watching carefully check the rear lights flash.
Check the indicator repeaters flash on the wings
Check the dash board, indicator green arrows flash.
Check the fuel pump starts running.

This pretty much confirms the various modules are healthy and communicating along the whole length of the vehicle.

In your case pay particular attention to the dash as this may confirm lack of activity on the module you mentioned.

Also post your readout here.

 

[Baldrick]

Sorry, no, not suffered nor heard of that before, although perhaps you might be able to lower the in cab temperature by unlocking and holding down the unlock remote fob button to lower the windows either a crack or completely depending on where you are (driveway/carpark etc). Pulling down all the blinds and an internal silver screen car windscreen cooler (common on the continent) might minimise the heat enough so it doesn’t happen. Sorry, very frustrating

 

[Roger Boeken]

To find the faulty component you can use a can of cold spray.
The reason can be defective component or bad soldering or even tear in printed circuit board .