U0155 and U0146

[stephan_porsche]

Greetings,

 

Need some help diagnosing to fault codes in my ECM Module.

 

2005 Porsche 997 Carrera S Cab

 

U0155: Lost communication with Instrument Cluster Control Cluster.

U0146: Lost communication with "Gateway A"

 

Searching Google only found two other Porsches with the same issue and they were undiagnosed. Now searching those faults individually found other vehicles had those faults when cracks developed in the Instrument Cluster solder joints, people disassembled their Instrument Clusters, resoldered all the joints and the fault went away.

 

Has anyone else had these faults or experience with them. I recently relocated from Arizona with glass smooth roads to the Los Angeles area and the roads are horrible!!! Just in the last 3-weeks my drivers door lock assembly failed and window goes up and down like crazy and difficult to lock door, I believe this failed due to the rough roads, these faults also developed at the same time, which leans me towards cracked solder joints in the Insteument Cluster. Car runs and drives fine, just have these faults now.

 

Sincerely,

 

Stephan

pellegrini_stephan@hotmail.com

Edited March 30, 2017 by stephan_porsche

[Loren]

U0146 Gateway control unit communication

Possible fault causes:
- No power supply for Gateway control unit
- Incorrect coding of Gateway control unit
- Short circuit or open circuit of CAN Drive
- Gateway control unit faulty (in most cases the cause is incorrect coding and not the Gateway control unit!)

 

U155 Instrument cluster, communication

Possible fault causes
- No power supply for instrument cluster
- Instrument cluster incorrectly coded
- Short circuit or open circuit in the CAN display
-J Instrument cluster faulty (in most cases the cause is not the instrument cluster but incorrect coding!)

[stephan_porsche]

22 minutes ago, Loren said:

U0146 Gateway control unit communication

Possible fault causes:
- No power supply for Gateway control unit
- Incorrect coding of Gateway control unit
- Short circuit or open circuit of CAN Drive
- Gateway control unit faulty (in most cases the cause is incorrect coding and not the Gateway control unit!)

 

U155 Instrument cluster, communication

Possible fault causes
- No power supply for instrument cluster
- Instrument cluster incorrectly coded
- Short circuit or open circuit in the CAN display
-J Instrument cluster faulty (in most cases the cause is not the instrument cluster but incorrect coding!)

 

How can verify the correct coding? And can I decode the module using Durametrics? I don't have a CAN Pin Out OBD Tester so can't check the CAN Bus. I am able to access all modules including Gateway and Instrument Cluster so not a power or ground issue.

[Loren]

Sorry, you will need a shop with a PIWIS to verify coding or re-program the module.

[stephan_porsche]

The problem is not coding then, I have owned the vehicle several years and have used Durametric on it 100+ times, those faults appeared when my door lock assembly became faulty. I am going to inspect the Instrument Cluster and wiring and then desolder the Instrument Cluster.


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[stephan_porsche]

From BAD TO WORSE. With Key Off I removed the Instrument Cluster to simply unplug and replug to rule out a lose or bad cluster connection and now my gauge cluster has gone haywire.

 

Short Test

Bosch Digital Motor Electronics Motronic 7.8.1

Current Fault Codes

U0155:

Lost communication with instrument cluster control module

U0146:

Lost communication with gateway "A"

Tiptronic Transmission for 997

No Faults Found

Porsche Stability Management - PSM

No Faults Found

All Wheel Drive - PTM

Porsche Active Suspension Management - PASM

No Faults Found

Tire Pressure Monitor - TPM

Instrument cluster - 9x7

Current Fault Codes

C141:

Communication PCM (display)

Vehicle Electrical System

No Faults Found

Airbag - POSIP

No Faults Found

Advanced Weight System - AWS

Steering Column Electronics

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file://C:\Program Files (x86)\Durametric Software Inc\Durametric 6\Data\HTML\ShortTes... 3/31/2017

No Faults Found

Air Conditioning

No Faults Found

Cornering Lights

Gateway

No Faults Found

Porsche Access System - PAS

No Faults Found

Front Body Module

No Faults Found

Rear Body Module

No Faults Found

Left Door Module

Current Fault Codes

8704:

Door h. button inner sh. stroke

Right Door Module

No Faults Found

Convertible Top

No Faults Found

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file://C:\Program Files (x86)\Durametric Software Inc\Durametric 6\Data\HTML\ShortTes... 3/31/2017

Targa Roof

Park Assist

Seat Memory

Sports Chronometer

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file://C:\Program Files (x86)\Durametric Software Inc\Durametric 6\Data\HTML\ShortTes... 3/31/2017

[stephan_porsche]

I took Cluster apart and found burnt ribbon to center Cluster.


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[stephan_porsche]

Sending Cluster out to be rebuilt.


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