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Audi a3 8p - The counter does not work, the car does not start

robsonwrc88 34914 14
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  • #1 16758255
    robsonwrc88
    Level 10  
    Hello,

    Colleagues, I have this problem

    After the night I enter the car and here the counter does not work, I turn the knob to dark, nothing is displayed. The air-conditioning panel display also does not work, but the air is coming. The car starts and goes off right away. I checked the fuses, everything was ok. After two days I wanted to disconnect the plug from the meter and here, as if nothing else works auto burns hmm?

    I connected the Vag and the mistakes themselves were made.


    Do you have any ideas What happened? Thanks.
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  • #2 16758265
    spinacz
    Level 42  
    Something with mass or power, you need to look carefully.
  • #3 16759409
    Jamrug
    Level 17  
    I would start with fuses.
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  • #4 16759969
    robsonwrc88
    Level 10  
    The fuses have been checked.
  • #5 16759981
    spinacz
    Level 42  
    Well, now mass and power, if the failure of the same does not work climate panel. It looks like there is no power supply from the key.
  • #6 16760719
    robsonwrc88
    Level 10  
    Today, however, the km / dates and fis display does not work, but the meter's lights are on. Now the air conditioning is working normally. I have not checked the mass and power yet
  • Helpful post
    #7 16760723
    spinacz
    Level 42  
    This indicates possible damage to the meter or cold February.
  • #8 16760941
    robsonwrc88
    Level 10  
    Well, that's how I bet. Now I do not know whether to look for a new one or give this meter a check?

    spinacz wrote:
    It looks like there is no power supply from the key.

    The meter should start after opening the door km / data and Fis after the key
  • Helpful post
    #9 16761059
    adam7009

    Level 41  
    Probably a damaged meter, this one can be repaired or another need, a matter of taste. There may be something on the can, because without it you will not start, but you would have to read the mistakes.
    Company Account:
    AUTO-ELELEKTRONIK AB
    Linowiec, Lisewo, 86-230 | Tel.: 697XXXXXX (Show)
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  • #10 16763372
    robsonwrc88
    Level 10  
    Today everything worked again ... I am looking for someone who will take in the counter, check it.
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  • Helpful post
    #11 16763814
    adam7009

    Level 41  
    Counter without a car is hard to check, because as I wrote without can not light up, and communication will be, you can only prophylactically repair what is usually raining and testing.
    Company Account:
    AUTO-ELELEKTRONIK AB
    Linowiec, Lisewo, 86-230 | Tel.: 697XXXXXX (Show)
  • #12 16792703
    robsonwrc88
    Level 10  
    Witam, Od tamtej pory jak na razie wszystko działa miałem oddać auto do elektryka ale wyjechać i na razie czekam.
    Dołączam autoscan.

    01-Engine -- Status: Malfunction 0010
    03-ABS Brakes -- Status: Malfunction 0010
    04-Steering Angle -- Status: OK 0000
    08-Auto HVAC -- Status: Malfunction 0010
    09-Cent. Elect. -- Status: Malfunction 0010
    15-Airbags -- Status: Malfunction 0010
    16-Steering wheel -- Status: Malfunction 0010
    17-Instruments -- Status: Malfunction 1010
    19-CAN Gateway -- Status: Malfunction 0010
    25-Immobilizer -- Status: Sporadic communication error 1000
    37-Navigation -- Status: Malfunction 1010
    42-Door Elect, Driver -- Status: Malfunction 0010
    44-Steering Assist -- Status: Malfunction 0010
    46-Central Conv. -- Status: OK 0000
    47-Sound System -- Status: OK 0000
    52-Door Elect, Pass. -- Status: Malfunction 0010
    56-Radio -- Status: Malfunction 1010
    62-Door, Rear Left -- Status: OK 0000
    72-Door, Rear Right -- Status: Malfunction 0010

    -------------------------------------------------------------------------------
    Address 01: Engine Labels: 03G-906-021-BLS.lbl
    Part No SW: 03G 906 056 N HW: 03G 906 021 AB
    Component: R4 1,9L EDC G000SG 3039
    Revision: --H11--- Serial number: AUX7Z0I4FNP0EN
    Coding: 0000071
    Shop #: WSC 14246 000 1048576
    VCID: 326F1EFBD6EF

    2 Faults Found:
    005712 - Powertrain Data Bus: Missing Message from Instrument Cluster
    P1650 - 000 - - - Intermittent
    Freeze Frame:
    Fault Status: 00100000
    Fault Priority: 3
    Fault Frequency: 7
    Mileage: 0 km
    Time Indication: 0

    Freeze Frame:
    RPM: 0 /min
    Speed: 0.0 km/h
    Load: 0.0 %
    Voltage: 12.16 V
    Bin. Bits: 11101100
    Torque: 0.0 Nm
    Torque: 119.6 Nm

    053273 - Control Module for Instrument Cluster: Missing Signal for Oil Level/Temperature
    U1019 - 000 - - - Intermittent
    Freeze Frame:
    Fault Status: 00100000
    Fault Priority: 3
    Fault Frequency: 5
    Mileage: 0 km
    Time Indication: 0

    Freeze Frame:
    RPM: 0 /min
    Speed: 0.0 km/h
    Load: 0.0 %
    Voltage: 12.16 V
    Bin. Bits: 11101100
    Bin. Bits: 00000000
    (no units): 0.0

    Readiness: 0 0 0 0 1

    -------------------------------------------------------------------------------
    Address 03: ABS Brakes (-----) Labels: 1K0-907-379-60EC1F.lbl
    Part No SW: 1K0 907 379 AN HW: 1K0 907 379 AN
    Component: ESP MK60EC1 H45 0107
    Revision: 00H45001
    Coding: 11422012092200FB880B04E5902000413800
    Shop #: WSC 00046 412 00000
    VCID: 7EF7FACB5237

    2 Faults Found:
    01317 - Control Module in Instrument Cluster (J285)
    004 - No Signal/Communication - Intermittent
    Freeze Frame:
    Fault Status: 00100100
    Fault Priority: 3
    Fault Frequency: 1
    Reset counter: 23
    Mileage: 1048575 km
    Time Indication: 0

    Freeze Frame:
    Count: 0
    Count: 0
    Count: 12288
    Count: 8208
    Count: 43264
    Count: 64768
    Count: 0
    Count: 0

    00474 - Control Module for Immobilizer
    004 - No Signal/Communication - Intermittent
    Freeze Frame:
    Fault Status: 00100100
    Fault Priority: 2
    Fault Frequency: 1
    Reset counter: 23
    Mileage: 1048575 km
    Time Indication: 0

    Freeze Frame:
    Count: 2
    Count: 0
    Count: 12288
    Count: 8211
    Count: 41984
    Count: 0
    Count: 0
    Count: 0


    -------------------------------------------------------------------------------
    Address 08: Auto HVAC Labels: 8P0-820-043.lbl
    Part No SW: 8P0 820 043 BK HW: 8P0 820 043 BK
    Component: KlimavollautomatH09 0130
    Revision: 000216 Serial number: 8P0820043BK
    Shop #: WSC 00000 000 00000
    VCID: 76E7E2EB7A07

    2 Faults Found:
    01317 - Control Module in Instrument Cluster (J285)
    008 - Implausible Signal - Intermittent
    Freeze Frame:
    Fault Status: 00101000
    Fault Priority: 3
    Fault Frequency: 1
    Reset counter: 63
    Mileage: 0 km
    Time Indication: 0

    Freeze Frame:
    ON

    00716 - Air recirculation Flap Positioning Motor (V113)
    003 - Mechanical Failure - Intermittent
    Freeze Frame:
    Fault Status: 00100011
    Fault Priority: 3
    Fault Frequency: 2
    Reset counter: 63
    Mileage: 231742 km
    Time Indication: 0
    Date: 2017.10.12
    Time: 03:39:29

    Freeze Frame:
    Voltage: 12.10 V
    Temperature: 28.0°C
    (no units): 135.0
    (no units): 194.0
    Temperature: 21.5°C


    -------------------------------------------------------------------------------
    Address 09: Cent. Elect. (J519) Labels: 8P0-907-063.lbl
    Part No SW: 8P0 907 063 A HW: 8P0 907 063 A
    Component: BCM PQ35 M 104 0541
    Revision: 00104 AG
    Coding: 06000A2FF0051AC0207040E00100815C477229AA116DC129E40008800040
    Shop #: WSC 00046 412 00000
    VCID: 326F1EFBD6EF

    Subsystem 1 - Part No SW: 8P1 955 119 F HW: 8P1 955 119 F
    Component: Wischer AU350 H10 0040
    Coding: 00DD13

    Subsystem 2 - Part No SW: 8K0 910 557 HW: 8K0 955 559 A
    Component: REGENLICHTSEN H04 0003
    Coding: 024C2D

    4 Faults Found:
    01317 - Control Module in Instrument Cluster (J285)
    004 - No Signal/Communication - Intermittent
    Freeze Frame:
    Fault Status: 00100100
    Fault Priority: 6
    Fault Frequency: 2
    Reset counter: 63
    Mileage: 231742 km
    Time Indication: 0

    Freeze Frame:
    Term 15 On
    Voltage: 12.10 V
    ON
    ON
    Term 50 Off
    OFF
    OFF

    00834 - Signal for Activation of Heated Rear Window
    009 - Open or Short to Ground - Intermittent
    Freeze Frame:
    Fault Status: 00101001
    Fault Priority: 5
    Fault Frequency: 1
    Reset counter: 63
    Time Indication: 0

    Freeze Frame:
    Term 15 Off
    Voltage: 12.20 V
    OFF
    ON
    Term 50 Off
    OFF
    OFF

    01800 - Light Switch (E1)
    008 - Implausible Signal
    Freeze Frame:
    Fault Status: 01101000
    Fault Priority: 3
    Fault Frequency: 1
    Reset counter: 23
    Mileage: 231742 km
    Time Indication: 0

    Freeze Frame:
    Term 15 Off
    Voltage: 12.40 V
    OFF
    ON
    Term 50 Off
    OFF
    OFF

    02195 - Dimmer Switch Instrument Panel & Switch Lighting (E20)
    002 - Lower Limit Exceeded
    Freeze Frame:
    Fault Status: 01100010
    Fault Priority: 5
    Fault Frequency: 1
    Reset counter: 23
    Mileage: 231742 km
    Time Indication: 0

    Freeze Frame:
    Term 15 Off
    Voltage: 12.35 V
    OFF
    ON
    Term 50 Off
    OFF
    OFF


    -------------------------------------------------------------------------------
    Address 15: Airbags (J234) Labels: 8P0-959-655-10.lbl
    Part No SW: 8P0 959 655 P HW: 8P0 959 655 P
    Component: Airbag AU1042 H06 0140
    Revision: -------- Serial number: 003FB00106VO
    Coding: 30314238303830303035554A304C38503053
    Shop #: WSC 00046 412 00000
    ASAM Dataset: EV_Airba10AURB4 001001
    ROD: EV_Airba10AURB4.rod
    VCID: 4FA9770FA51D

    Driver's Airbag Crash Sensor:
    Serial number: 3572DRB400006864D22R

    Passenger Side Airbag Crash Sensor:
    Serial number: 3582DRB400008BC0798%

    Driver's Rear Airbag Crash Sensor:
    Serial number: 35128RB400004D897A5V

    Passenger's Rear Airbag Crash Sensor:
    Serial number: 35228RB400004D1AEF5

    Driver's Front Airbag Crash Sensor:
    Serial number: 35547RB400004CE67BE5

    Passenger's Front Airbag Crash Sensor:
    Serial number: 35647RB400004CE672C

    1 Fault Found:
    12670208 - No Communication with Instrument Cluster
    U0155 00 [008] - -
    Freeze Frame:
    Fault Status: 00000001
    Fault Priority: 6
    Fault Frequency: 1
    Reset counter: 63
    Mileage: 0 km
    Date: 2000.00.00
    Time: 00:00:00


    -------------------------------------------------------------------------------
    Address 16: Steering wheel Labels: 8P0-953-549.lbl
    Part No SW: 8P0 953 549 K HW: 8P0 953 549 K
    Component: J0527 H37 0070
    Coding: 0003042
    Shop #: WSC 00046 412 00000
    VCID: 4687522B4A67

    Part No: XXXXXXXXXXX
    Component: E0221 H02 0030

    3 Faults Found:
    01317 - Control Module in Instrument Cluster (J285)
    004 - No Signal/Communication - Intermittent
    01303 - Telephone Transceiver (R36)
    004 - No Signal/Communication
    01304 - Radio
    004 - No Signal/Communication - Intermittent

    -------------------------------------------------------------------------------
    Address 17: Instruments Labels: 8P0-920-xxx-17-MY8.lbl
    Part No SW: 8P0 920 932 C HW: 8P0 920 932 C
    Component: KOMBIINSTR. VDO H02 0980
    Revision: D0H02002 Serial number: 2244I002003082
    Coding: 0004128
    Shop #: WSC 80093 222 69422
    VCID: 346318E32CFB

    2 Faults Found:
    00447 - Function Limitation due to Over-Voltage
    001 - Upper Limit Exceeded - Intermittent
    Freeze Frame:
    Fault Status: 00100001
    Fault Priority: 4
    Fault Frequency: 1
    Reset counter: 63
    Mileage: 231742 km
    Time Indication: 0
    Date: 2017.10.12
    Time: 03:39:52

    00532 - Supply Voltage B+
    001 - Upper Limit Exceeded - Intermittent
    Freeze Frame:
    Fault Status: 00100001
    Fault Priority: 4
    Fault Frequency: 1
    Reset counter: 63
    Mileage: 231742 km
    Time Indication: 0
    Date: 2017.10.12
    Time: 03:40:27


    -------------------------------------------------------------------------------
    Address 19: CAN Gateway Labels: 1K0-907-530.lbl
    Part No SW: 1K0 907 530 AA HW: 1K0 907 951
    Component: J533 Gateway H16 0222
    Revision: H16 Serial number: 4040K09509834A
    Coding: E9807F06500202002102
    Shop #: WSC 00046 412 00000
    VCID: 66C7B2AB2AA7

    4 Faults Found:
    00474 - Control Module for Immobilizer
    004 - No Signal/Communication - Intermittent
    Freeze Frame:
    Fault Status: 00100100
    Fault Priority: 2
    Fault Frequency: 3
    Reset counter: 63
    Mileage: 0 km
    Time Indication: 0

    01317 - Control Module in Instrument Cluster (J285)
    004 - No Signal/Communication - Intermittent
    Freeze Frame:
    Fault Status: 00100100
    Fault Priority: 2
    Fault Frequency: 3
    Reset counter: 63
    Mileage: 0 km
    Time Indication: 0

    01300 - Control Module for Navigation with CD-Rom (J401)
    004 - No Signal/Communication - Intermittent
    Freeze Frame:
    Fault Status: 00100100
    Fault Priority: 2
    Fault Frequency: 1
    Reset counter: 63
    Mileage: 231742 km
    Time Indication: 0

    01304 - Radio
    004 - No Signal/Communication - Intermittent
    Freeze Frame:
    Fault Status: 00100100
    Fault Priority: 2
    Fault Frequency: 1
    Reset counter: 63
    Mileage: 231742 km
    Time Indication: 0


    -------------------------------------------------------------------------------
    Address 25: Immobilizer Labels: 1K0-920-xxx-25.lbl
    Part No SW: 8P0 920 932 C HW: 8P0 920 932 C
    Component: KOMBIINSTR. VDO H02 0980
    Revision: D0H02002 Serial number: AUX7Z0I4FNP0EN
    Shop #: WSC 00000 000 00000
    VCID: 346318E32CFB

    No fault code found.

    -------------------------------------------------------------------------------
    Address 37: Navigation Labels: 8E0-035-192-RNSE.lbl
    Part No SW: 8E0 035 192 C HW: 8E0 035 192 C
    Component: RNS-E HIGH EU H44 0750
    Revision: 03S Serial number: AUZBZ7D0010087
    Coding: 0205155
    Shop #: WSC 63481 512 00000
    VCID: 2443E8A39C1B

    2 Faults Found:
    16352 - Control Module - Electrical Error
    014 - Defective - Intermittent
    Freeze Frame:
    Fault Status: 00101110
    Fault Priority: 5
    Fault Frequency: 1
    Reset counter: 41
    Time Indication: 0
    Date: 2012.08.25
    Time: 17:03:02

    01317 - Control Module in Instrument Cluster (J285)
    004 - No Signal/Communication - Intermittent
    Freeze Frame:
    Fault Status: 00100100
    Fault Priority: 5
    Fault Frequency: 1
    Reset counter: 63
    Mileage: 0 km
    Time Indication: 0


    -------------------------------------------------------------------------------
    Address 42: Door Elect, Driver Labels: 8P0-959-801-MIN3.lbl
    Part No SW: 8P0 959 801 N HW: 8P0 959 801 N
    Component: Tuer-SG H04 0100
    Coding: 0000252
    Shop #: WSC 00046 412 00000
    VCID: 4687522B4A67

    1 Fault Found:
    01317 - Control Module in Instrument Cluster (J285)
    004 - No Signal/Communication - Intermittent

    -------------------------------------------------------------------------------
    Address 44: Steering Assist Labels: 1Kx-909-14x-44.lbl
    Part No: 1K0 909 144 E
    Component: EPS_ZFLS Kl. 232 2501
    Revision: 00H15000
    Shop #: WSC 02069 000 90108
    VCID: 2C530083F4CB

    2 Faults Found:
    01317 - Control Module in Instrument Cluster (J285)
    004 - No Signal/Communication - Intermittent
    Freeze Frame:
    Fault Status: 00100100
    Fault Priority: 3
    Fault Frequency: 1
    Reset counter: 73
    Time Indication: 0

    Freeze Frame:
    Voltage: 12.13 V
    DD
    Temperature: 14.0°C
    RPM: 0 /min
    Speed: 0.0 km/h
    Speed: 0.0 km/h
    Count: 0

    00750 - Warning Lamp
    013 - Check DTC Memory - Intermittent
    Freeze Frame:
    Fault Status: 00101101
    Fault Priority: 2
    Fault Frequency: 1
    Reset counter: 50
    Time Indication: 0

    Freeze Frame:
    Voltage: 12.25 V
    DD
    Temperature: 21.0°C
    RPM: 0 /min
    Speed: 0.0 km/h
    Speed: 0.0 km/h
    Count: 0


    -------------------------------------------------------------------------------
    Address 47: Sound System Labels: 8Px-035-382.lbl
    Part No SW: 8P4 035 382 E HW: 8P4 035 382 E
    Component: AB2 SUBWOOFERBOXH07 0180
    Revision: 00006 Serial number: 92158949035940
    Shop #: WSC 00000 000 00000
    VCID: 366722EB3A87

    No fault code found.

    -------------------------------------------------------------------------------
    Address 52: Door Elect, Pass. Labels: 1K0-959-702-MIN3.lbl
    Part No SW: 8P0 959 802 N HW: 8P0 959 802 N
    Component: Tuer-SG H04 0100
    Coding: 0000252
    Shop #: WSC 00046 412 00000
    VCID: 47995F2F4D6D

    1 Fault Found:
    01317 - Control Module in Instrument Cluster (J285)
    004 - No Signal/Communication - Intermittent

    -------------------------------------------------------------------------------
    Address 56: Radio Labels: 8E0-035-192-RNSE.lbl
    Part No SW: 8E0 035 192 C HW: 8E0 035 192 C
    Component: RNS-E HIGH EU H44 0750
    Revision: 03S Serial number: AUZBZ7D0010087
    Coding: 0205155
    Shop #: WSC 63481 512 00000
    VCID: 2443E8A39C1B

    2 Faults Found:
    16352 - Control Module - Electrical Error
    014 - Defective - Intermittent
    Freeze Frame:
    Fault Status: 00101110
    Fault Priority: 5
    Fault Frequency: 1
    Reset counter: 41
    Time Indication: 0
    Date: 2012.08.25
    Time: 17:03:02

    01317 - Control Module in Instrument Cluster (J285)
    004 - No Signal/Communication - Intermittent
    Freeze Frame:
    Fault Status: 00100100
    Fault Priority: 5
    Fault Frequency: 1
    Reset counter: 63
    Mileage: 0 km
    Time Indication: 0


    -------------------------------------------------------------------------------
    Address 62: Door, Rear Left Labels: 8P4-959-801.lbl
    Part No SW: 8P4 959 801 F HW: 8P4 959 801 F
    Component: Tuer-SG H04 0050
    Coding: 0000216
    Shop #: WSC 00046 412 1012544
    VCID: 428F4E3B664F

    No fault code found.
  • #13 16795262
    rosak
    Car dashboards specialist
    Hello, would a friend adam7009 be so kind and share information, what is usually raining in these meters? I got one for repair yesterday (8P0920980P), supposedly dead, I have not checked yet because I have several others in the queue. I was hoping to move it as a standard VAG-COM, and I saw a frame for firing 0x575 07 00 somewhere in the forum. Thanks in advance for your help.

    Added after 17 [hours] 51 [minutes]:

    I was able to fire the counter on the table without a problem.

    Audi a3 8p - The counter does not work, the car does not start

    The meter is alive, so probably the problem lies somewhere else, unless "he repaired himself when I opened it" in what I doubt. Unfortunately, I have no contact with the client
    .
    Does anyone know how to run a meter test? I tried VAG CAN PRO but it does not communicate, I do not know if it does not have to have a gateway to it. There is a movie on YT but of course without information



  • #14 19476452
    Amo34
    Level 6  
    Hello, could I ask for a diagram of how to connect such a counter on the table? I have a similar problem and I do not know if the fault is on the car's side or the clock itself has died. Regards, I mean the one with 1 blue cube
  • #15 20494705
    skorpion201
    Level 9  
    Hi.
    can you tell me what was? because I have the same in A3 8P ...

    >>16758255

Topic summary

✨ The discussion revolves around an Audi A3 8P experiencing issues with the instrument cluster and air conditioning panel, where the counter does not work, and the car starts but shuts off immediately. Initial checks included fuses, which were found to be intact. Participants suggest investigating power supply and grounding issues, as the climate control panel also exhibited problems. The author later reports intermittent functionality of the meter and expresses uncertainty about whether to repair or replace it. Diagnostic scans reveal multiple malfunctions across various systems, indicating potential issues with the CAN bus or the meter itself. Some users share experiences with similar problems and inquire about testing methods for the meter.
Generated by the language model.

FAQ

TL;DR: On this A3 8P case, 11 control modules reported “No Signal/Communication” with the instrument cluster (J285). “No Signal/Communication” errors point to cluster power/ground/CAN faults. Car may start, then stall, or run with the cluster unplugged. [Elektroda, robsonwrc88, post #16792703]

Why it matters: If J285 drops off the CAN bus, immobilizer handshakes fail and drivability and safety features go dark.

Who this is for: Audi A3 8P owners and techs troubleshooting dead cluster, HVAC display loss, or intermittent no-start.

Quick Facts

What usually causes an Audi A3 8P to start and immediately die when the cluster is dead?

Loss of communication with the instrument cluster J285 breaks immobilizer validation. The engine fires, then shuts down. One expert noted the car will not start without the cluster present on CAN. That points to a cluster fault, its power/ground, or CAN wiring. [Elektroda, adam7009, post #16761059]

How can I quickly triage this fault at home?

Do a basic three-step check: 1) Scan all modules and note J285 communication faults. 2) Verify ignition-switched power and grounds at the cluster connector. 3) As a functional test, unplug the cluster and try starting; if it then runs, the cluster or its feed is implicated. [Elektroda, robsonwrc88, post #16758255]

Which DTCs in this thread point to a power or spike issue at the cluster?

The instrument cluster logged 00447 “Function Limitation due to Over-Voltage” and 00532 “Supply Voltage B+ Upper Limit Exceeded.” Freeze frames captured around 12.10–12.40 V battery voltage, indicating transient spikes rather than a flat overcharge. [Elektroda, robsonwrc88, post #16792703]

Is this problem intermittent or constant?

Intermittent. The original poster reported that everything worked again temporarily, then faults returned. Intermittent operation suggests marginal connections, cracked solder joints, or temperature-sensitive electronics in the cluster or its feeds. [Elektroda, robsonwrc88, post #16763372]

What is CAN bus, and why does J285 matter here?

The CAN bus is the car’s data backbone. J285 (instrument cluster) exchanges security and status data over CAN. When J285 drops, many modules log “No Signal/Communication,” and immobilizer authorization can fail. “Without it you will not start.” [Elektroda, adam7009, post #16761059]

How many modules complained about the cluster in this case?

At least 10 separate control modules reported “No Signal/Communication” with J285, including ABS, Airbag, Steering Assist, Doors, Radio, and HVAC. That breadth points to a cluster-side outage rather than a single downstream module fault. [Elektroda, robsonwrc88, post #16792703]

Does unplugging the cluster really let the car run?

In this case, yes. The OP noted the car would start and stay running when the cluster connector was removed, which helps isolate the fault toward the cluster or its power path. [Elektroda, robsonwrc88, post #16758255]

What did forum experts suggest as first checks?

“It looks like there is no power supply from the key.” Check ignition-switched feeds, grounds, and related fuses before condemning the cluster. Wiggle-test the harness while monitoring live data to catch drops. [Elektroda, spinacz, post #16759981]

Can I bench‑test an A3 8P cluster?

Yes. One member powered an 8P0 920 980P cluster on the bench and confirmed it was alive. They referenced CAN frame 0x575 to wake it. Communication may require a gateway on the bench for full output tests. [Elektroda, rosak, post #16795262]

How do I run a quick 3‑step bench test on this cluster?

  1. Provide stable 12 V and ground to the correct pins. 2. Send the wake frame (e.g., 0x575) on CAN to light the unit. 3. Observe the display/needles; some tools won’t talk without a gateway present. [Elektroda, rosak, post #16795262]

My dimmer and light switch show faults. Are they related?

Yes, they can be collateral symptoms. The scan showed 01800 Light Switch “Implausible Signal” and 02195 Dimmer “Lower Limit Exceeded.” These appear alongside J285 communication faults, indicating shared power or bus disruptions. [Elektroda, robsonwrc88, post #16792703]

What is the edge case to watch for with over‑voltage codes here?

Over‑voltage DTCs can set even when captured battery voltage looks normal (12.10–12.40 V). That suggests brief alternator spikes or internal regulator glitches that the logger missed in the freeze frame. [Elektroda, robsonwrc88, post #16792703]

How should I interpret the HVAC behavior in this thread?

HVAC initially had a blank display while airflow worked, then returned to normal. Later, HVAC logged an intermittent J285 implausible signal and a recirculation flap motor fault. Treat HVAC symptoms as secondary to the cluster/bus issue. [Elektroda, robsonwrc88, post #16792703]

I have the one‑blue‑plug cluster. How do I wire it on the table?

You need 12 V, ground, and CAN High/Low to the proper pins, plus a wake frame if required. A member confirmed bench firing but did not post a full pinout. Use a lab supply and CAN tool. [Elektroda, rosak, post #16795262]

Was a final fix posted for this car?

No confirmed root‑cause or repair was posted. Years later, another member asked for the resolution, indicating the thread remained open-ended. Plan your own diagnostics rather than waiting on a closure. [Elektroda, skorpion201, post #20494705]

What tools were used or mentioned in this thread?

VCDS/VAG‑COM for autoscan, and VAG CAN PRO for attempted output tests on the bench. A CAN frame (0x575) was referenced for wake‑up during bench checks. [Elektroda, rosak, post #16795262]
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