Hello everyone as some of you know I had no communication with engine control module
on my 2003 str will that is finally sorted

But now the wifes 4.2 N/A had the same problem
It ended up being in the instrument cluster cold soldier joints but also the lcd back light is not working so very hard to see mileage
dose any one know where to get replacement lcd display from or can you charge the back light
Thinking you
Darrol

 

There are probably firms who fix such.

Or buy a used cluster and take parts from it.

 

Hi Darrol, what was the key to finally solve your STR ECM issue, which seemed to be unsolvable?

 

Hi Peter
After All the headaches it turned out the cluster was not sending a wake-up signal to ecm
As last Resort I decided to send cluster to a company called asco instruments
it ended up having Moisture damage but only enough to disturb ecm wake up signal and a couple of cold soldier joints
but even when they were testing cluster all functions were working fine
thanks Darrol

 

hi cluster is at the company who fixed my str cluster
There supplier,s can not find the lcd display
yes could get a used one but then you run the risk of purchasing one with same problem
Thanks

 

So, after all, the cause for all the problems in the first place was not, that the battery-power of the apprentice's computer at the car-electricians ran out, while meddling with your S-Type software?
That was just a pure coincidence for that to happen, while the cluster had moisture-damage and cold solder points?

 

Good find and with age those cold solder joints will be a more common problem in the future.
Hope more companies start repairing these type of failures as they are hard to diagnosis!
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Hi Peter to answer this there are two answers
YES AND NO
this is what was explained in me
From the condition of the soldier joints they looked fine but under xray they were not there could have been a problem for a few years but left undisturbed cluster will work perfectly fine as long as you do not discharge the circuit board capacitors it can still function and communicate with ecm as both cluster and ecm have Security code stored in memory even if you disconnect battery

so this is what they believe happened

When the apprentice when to program park-brake module
There system told him to reconfigure ecm
But they had no voltage Stabilizer connected to vehicle
Voltage dropped below 12.5 volts
And they lost communication with ecm and there system told them to disconnect battery for 1 minute and re connect
battery
Well this deleted all power from ecm when it was in the reconfigure stage
And deleted all stored data
Which then caused no communication between cluster and ecm
Even though cluster was not 100% working all vital data was stored between cluster and ecm which allowed vehicle to start as ecm still believed cluster was sending wake-up signal
so if they had not tried to reconfigure ecm
Vehicle would have still kept starting
So that why the answer to you question is
YES AND NO
Hopefully you can understand this because I'm still stumped
But str is going now so I'm happy
Thanking you
Darrol

 

yes true
But what I have found out is even if cluster has cold solder joints if left alone cluster can still function normally
Depending on what circuit is affected
thanks
Darrol

 

Again and again and again! You MUST use SDD with the proper DC power supply. Which is NOT a battery charger. This is just one of dozens of disasters because people refuse to follow JLR's recommendation for the power supply.

So some idiot in a shop attempted programming without ANYTHING hooked up to the car? That shop must not have any experience with modern cars!
Terrible work by incompetent people. It's a shame you got caught up in this too. So sorry to hear it!
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excellent take club. I bet the shop bricked the original ecm and the replacement tested fine but really could not pass the necessary voltage at the weak solder joints. Reminds me of iffy coils on my car glitching at high power demands and affecting the tcm but not the ecm

 

So true i found that out the hard way 30 years ago
With my BMW that had a body control module problem
Back then one of my friend's had a bmw programer
but he used a 16 amp battery charger long story short
It all turned to ****

But when I purchased my BMW ICON A3 programer
that came with a battery voltage Stabilizer

So like you i don't understand why people dont use them
cheers
Darrol