Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[Viral_Jim]

So, further multi-meter led diagnosis has been done and I am now as sure as I can be that its the rotary connector.  Today I have:

• Removed airbag unit, steering wheel and associated shrouds/trim
• Cleaned all contacts that were readily aaccessible
• Checked resistance to ECU from airbag plugs (results within 0.1 ohm of what the diagnostic computer states with airbag connected)
• Partial reassembly (left off shrouds)

So I can rule out the airbag as the issue on this basis. I have come back to the rotary connector as, looking at live resistance data while turning the wheel, resistance on the circuits seems to fluctuate between 2ohm and 5ohm, suggesting the fault lies there. I should have applied this test last time around, but I forgot that the data was live rather than a snapshot  .

A used replacement CIM has been ordered for £25 (new/refurbished ones are £250plus  ). I will report further on progress. 

[dave the builder]

do you have your "car pass" with the unlock code for the ECU 
IIRC Astra H CIMs are coded to the car ,along with many other modules ,fuse box etc
Also not sure if a replacement CIM has to be divorced before fitting 

[Viral_Jim]

So, this one had been 'divorced' ready to fit.

BUT, to save on coding costs, according to an astra H forum (same part number) you can disassemble the CIM, change the rotary connector and build it back up retaining the part of the CIM that pairs to the car.

[dave the builder]

So, this one had been 'divorced' ready to fit.

BUT, to save on coding costs, according to an astra H forum (same part number) you can disassemble the CIM, change the rotary connector and build it back up retaining the part of the CIM that pairs to the car.

That's hood then 
good luck with it

[Viral_Jim]

Finally got an hour this morning to have a play about.

I'm pleased to say that it was pretty straightforward to split the upper and lower parts of the CIM. The 'lid' does indeed contain the rotary connector and basically not a lot else. I was able to swap this over onto my CIM and reinstall with no complaints from the car.

So far so good after a test drive. Its second hand so it's lifespan is obviously unknown, but at £23 delivered its a cheap enough fix.

Thanks for the help all 

[STEMO]

Finally got an hour this morning to have a play about.

I'm pleased to say that it was pretty straightforward to split the upper and lower parts of the CIM. The 'lid' does indeed contain the rotary connector and basically not a lot else. I was able to swap this over onto my CIM and reinstall with no complaints from the car.

So far so good after a test drive. Its second hand so it's lifespan is obviously unknown, but at £23 delivered its a cheap enough fix.

Thanks for the help all 

It's good when something works out like that 

[TheBoy]

Great news.  And even if it doesn't last the life of the car, you'll know where to look first