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  #1  
Old 04-08-2023, 11:41 AM
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ISTA no communication to modules (egs,...)

Hi all,

New to the forum here, recently bought an bmw e53 4.8is from 2004. I'm working on the maintenance (zero status) and wanted to do a transmission oil change including the mechatronics seals.

To replace those i need to be able to readout the oil temp. in the gearbox.
I have connected the to ista and found many fault code related to "no communication"

I have checked the obd connection for a 12V supply on pin 16. which is present.

Can you guys please help what to check next?
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Old 04-08-2023, 12:25 PM
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What interface you are using, are pins 7 and 8 connected together?

These with metal sump it's quite easy to check by hand that temp is in the required 30-50 C range.
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Old 04-08-2023, 12:30 PM
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What do you mean connected together?
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Old 04-08-2023, 02:43 PM
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On the interface side those pins should be in same potential (shorted).
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Old 04-08-2023, 02:58 PM
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Quote:
Originally Posted by Clavurion View Post
On the interface side those pins should be in same potential (shorted).
With interface, you mean on the other side of the plug, right?
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Old 04-08-2023, 03:12 PM
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Quote:
Originally Posted by Jmol View Post
With interface, you mean on the other side of the plug, right?
The diagnostic cable you are using.
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Old 04-08-2023, 04:07 PM
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Quote:
Originally Posted by Clavurion View Post
The diagnostic cable you are using.
Just checked the interface cable, its the cable with a switch and 7 & 8 are bridged.

Btw, don't know if that matters but i see alot of People using the blue version cable..
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Old 04-08-2023, 04:59 PM
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bridging pins is needed on early X5's

Quote:
Originally Posted by Jmol View Post
Just checked the interface cable, its the cable with a switch and 7 & 8 are bridged.

Btw, don't know if that matters but i see alot of People using the blue version cable..
I bought a blue cable on Amazon, and it also has 7 & 8 bridged. Works fine on my 2001 X5 (K-line only), on INPA (using my Windows 11 laptop), or while running Torque Pro, OBDLink, or BimmerTool apps on my Android tablet.
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Old 04-09-2023, 05:14 AM
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Yes should be the same.

Anyone could help me solve the communication issues?
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Old 05-25-2023, 08:56 PM
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Check your windows firewall. You need to make sure it’s allowing communication with the cable/car. I disable mine altogether on my dedicated car laptop.
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