The secretive insides of the Heater Control Box.

The secretive insides of the Heater Control Box.

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Discussion

HellK9

Original Poster:

247 posts

126 months

Sunday 4th November
quotequote all
Wondered if anyone had cracked one of these things open before?

I've popped the caps on C7 C8. I realize that there will be other damage but I'm unable to see anything blatantly burned. I do however have a weird jumpered diode arrangement bridging the two halves of the control box. It looks to be standard, although one pin is snapped (I can't tell if it was done before hand, or it was me removing the hot glue holding everything together.It's an idiotic bridge if it's standard, given the leg of the diode has to bend with the twist of the cable.

I wondered if anyone had done any board level repairs on the heater control box before and had possibly seen the caps on c7 c8 burned on the voltage level shifter side? (boy am I stretching it).

Which brings me to a second question. Is the two layers of the board seriously held together with glue and some silly posts that don't fit the board? or again.. is this just someone, somewhere playing with my mind?






crypto

216 posts

177 months

Saturday 1st December
quotequote all
Just opened the same box because my rear window heating is not working. Everything looks very much in a prototype state. Nothing really fits and it looks like an unfinished tinkering project. The 2 separate wires bridging the pcb's are 1 kOhm resistors. I couldn't find any defects on my ecu but attached now proper stand-off bolts holding the sandwich together.

Replacing the caps seems easy, but I wonder what made them pop ?

What is actually the problem with your ECU ?

gruffalo

5,859 posts

162 months

Sunday 2nd December
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Capacitors age and therefore have a time limited life, they have probably popped due to age nothing more.


HellK9

Original Poster:

247 posts

126 months

Friday 7th December
quotequote all
crypto said:
Just opened the same box because my rear window heating is not working. Everything looks very much in a prototype state. Nothing really fits and it looks like an unfinished tinkering project. The 2 separate wires bridging the pcb's are 1 kOhm resistors. I couldn't find any defects on my ecu but attached now proper stand-off bolts holding the sandwich together.

Replacing the caps seems easy, but I wonder what made them pop ?

What is actually the problem with your ECU ?
I'm asking the same questions. I'm a module replacement guy and I don't have a hope of scoping it out. I will however replace the stupid stands with proper screw type standoffs (which is weird as it's something so very simple to do).
My cold fan simply didn't work.... had my auto sparky "send it away", plugged it in and now all relays are closed (as in both fans, and whatever else it drives is on). Caps are a consequence of whomever hacked it.... just don't know what they did to blow the caps.