BMW G30 530e coolant pump for low temperature coolant circuit:) Missing error

Joined
7 Nov 2010
Messages
2
Reaction score
0
Country
United Kingdom
Hi
I have a BMW 530e G30 2.0 Petrol Hybrid (B48B20A) with 60k mileage 2018. Whilst doing a service, I performed a diagnostic which returned 2 errors on the vehicle.
- 1B830A | LIN, communication (coolant pump for low temperature coolant circuit
smile.gif
Missing
Existent: Yes
- 80436C Auxiliary coolant pump: Short circuit to positive terminal or open circuit
Existent: No
On the dash there is no errors present (ISTA says no error message will be displayed on dash). Using ISTA I performed guided fault finding. Activating the pump via ISTA did not result in the coolant pump switching on. No readings of coolant pump speed were relayed back to ISTA which was stuck on 255. Firstly, I checked ALL fuses in boot, driver footwell and passengers footwell which were fine. I was getting nominal voltage of 0.02v at wire harness which suggested power was being relayed. I checked the LIN cable which runs to the ECU from the cable harness and there was continuity present so cable looks good. Finally, I went on to replace the pump with a new pump and still this error message is present.
Has anyone come across this error? Any ideas on what I may have missed?
Many thanks in advance.
 

Attachments

  • 20221020_195455.jpg
    20221020_195455.jpg
    155.2 KB · Views: 77
  • 20221020_195644.jpg
    20221020_195644.jpg
    137.2 KB · Views: 49
  • 20221030_162919.jpg
    20221030_162919.jpg
    134.3 KB · Views: 62
  • Coolant Pump.PNG
    Coolant Pump.PNG
    375.8 KB · Views: 92
Sponsored Links
You should taks notice of what you have been told on another forum.

Some very knowledgeable people and advice on there
 
There are 2 pumps. Did you replace the right one? Unplug each pump and see which error is to do with which pump.
 
Sponsored Links
you verified any test voltages at the pump wiring?
the connector for the pump has 3 wires, positive, lin, neutral. Lin and neutral are working. the postive cable does not provide any voltage (0.02v) hence the pump is not working.

I am trying to locate the fuse for the aux pump but have been unable to. Ive checked the 3 fuse boxes in the car (boot, passengars footwell and drivers footwell) non are for the pump.

Where is the BDC located in this? ive checked driver footwell on the side and its not there
 
Back
Top