G62 Coolant temp Instrument c luster!

[Speedparts]

Hello guys ! Merry X-mas !!

I have a problem with an instrument cluster (maybe ? ) ,thats why I want your lights

The car is Ibiza 6L FR 20vt . The coolant needle goes up and down some times from 70 to 90 degrees. VCDS displays

1 Fault Found:
16500 - Engine Coolant Temp. Sensor (G62)
P0116 - 35-00 - Implausible Signal
Readiness: 0010 1101

In engine module .Changing G62 didnt help at all. When DTC is present the needle will hop up and down. When I delete it , it goes normal ?!?!?! .After a test drive in the city everything ok , when driving in highways the needle starts 70-90.

While logging I noticed that in instruments cluster it displays 60-70 degrees but in engine module it displays 89-90 as it should..

I thought the signal is from the same sensor ? Maybe the Instument cluster is fried and gets the signal wrong so it displays 70 ?
Then why when deleting the DTC , instrument cluster works ok ??

We also swaped ECU just in case.. your lights pleaseeeeee thanks !

HAPPY NEW 2015 !!

 

[DrPeter]

Hello,

It would be most helpful to post a complete vehicle Auto-Scan, that way we can see the vehicle details and exactly what engine and instrument cluster your vehicle has.

http://www.ross-tech.com/vcds/tour/autoscan.html

How to - Auto-Scan video

Thank you,

drpeter

 

[Speedparts]

Friday,09,January,2015,09:59:49:29510
VCDS -- Windows Based VAG/VAS Emulator
VCDS Version: 14.10.0.0 (x64)
Data version: 20141022

Dealer/Shop Name: SPTunes
Workshop Code: 000 12349 000000

VIN: VSSZZZ6LZ7R039685   License Plate:IBIZAFR
Mileage: 151830km-94342mi   Repair Order: 



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type: 6L (6L - Seat Ibiza/Cordoba (2002 > 2009))
Scan: 01 02 03 08 09 15 17 19 25 37 44 46 55 56
 
VIN: VSSZZZ6LZ7R039685   Mileage: 151830km-94342miles
-------------------------------------------------------------------------------
Address 01: Engine        Labels: None
   Part No: 06A 906 032 QN
   Component: 1.8I R4/5VT         0020  
   Coding: 11500
   Shop #: WSC 78384  
   VCID: 7AFB252366AC1FF121F-5140
   VSSZZZ6LZ7R039685     SEZ7Z0F3536515

1 Fault Found:
16500 - Engine Coolant Temp. Sensor (G62) 
            P0116 - 35-00 - Implausible Signal
Readiness: 0010 1101

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 6R0-907-37x-ASR80.lbl
   Part No SW: 6Q0 907 379 AG    HW: 6Q0 907 379 AG
   Component: MABS 8.0 front  H05 0002  
   Revision: 00000000    Serial number: 00000000000000
   Coding: 0002241
   Shop #: WSC 06402 785 00200
   VCID: 020B5DC35E7C573179F-5140

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: None
   Part No: 6L0 820 043 E
   Component: CLIMAtronic PQ24    3805  
   Shop #: WSC 00000 000 00000
   VCID: 285F2F6B98805D6107B-5140

1 Fault Found:
00457 - Control Module for Network (J519) 
            013 - Check DTC Memory

-------------------------------------------------------------------------------
Address 09: Cent. Elect.        Labels: 6Qx-937-049-C.lbl
   Part No: 6Q1 937 049 D
   Component: 0000 BN-SG.         1S34  
   Coding: 16524
   Shop #: WSC 06402  
   VCID: 3C77E33B2C18E1C1733-5140

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 6Q0-909-605-VW5.lbl
   Part No: 6Q0 909 605 AE
   Component: 0H AIRBAG VW5  0C   0010  
   Coding: 12360
   Shop #: WSC 06401  
   VCID: 7AFB252366AC1FF121F-5140

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 6L0-920-xx3-17.lbl
   Part No: 6L0 920 823 G
   Component: KOMBIINSTRUMENT VDO V01  
   Coding: 00101
   Shop #: WSC 00000  
   VCID: 3169C20FFB5A1CA9D05-5124

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels: 6N0-909-901-19.lbl
   Part No: 6N0 909 901 
   Component: 0068 GATEWAY CAN    1S34  
   Coding: 00014
   Shop #: WSC 06402  
   VCID: 70EF070B30D055A19FB-5140

No fault code found.

-------------------------------------------------------------------------------
Address 25: Immobilizer        Labels: 5J0-920-xxx-25.clb
   Part No: 6L0 920 823 G
   Component: IMMOBILIZER VDO V01  
   Coding: 00101
   Shop #: WSC 00000  
   VCID: 3169C20FFB5A1CA9D05-5124
   VSSZZZ6LZ7R039685     SEZ7Z0F3536515

No fault code found.

-------------------------------------------------------------------------------
Address 44: Steering Assist        Labels: 6Q0-423-156.clb
   Part No: 6Q0 423 156 AB
   Component: LenkhilfeTRW        V270  
   Coding: 10121
   Shop #: WSC 06402  
   VCID: 6FED04772DEE4A59861-5140

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels: 6Q0-959-433.lbl
   Part No: 6Q0 959 433 E
   Component:    Komfortgerát     0002  
   Coding: 00016
   Shop #: WSC 06402  
   VCID: 3D71EE3F3702E8C944D-4AE8

No fault code found.

End-------------------------(Elapsed Time: 02:54)--------------------------

 

[Speedparts]

So Any thoughts ?? maybe thermostat

 

[Santos]

Did you replace the sensor with a Factory part? I had something similar with a customer that used an aftermarket coolant temp sensor.

 

[Uwe]

I have my doubts that an issue with the thermostat would cause an "implausible signal" DTC from the temperature sender.

How fast does the needle move when you describe it as "hop up and down"?

-Uwe-

 

[DrPeter]

Hello,

So Any thoughts ?? maybe thermostat

- Yes, maybe a failed thermostat.

1) Have a look at the 01-Engine, Measuring Value Block Group [004] field [3], this will display the engine coolant temperature, value comes from the G62-Coolant Temp Sensor.
- Start the engine, should be could and see if the G62 reading increases with the coolant temperature, if the sensor fails to show the real temperature of the engine, suspect a failed G62 or wiring/connections concerns.

2) Verify the coolant temperature remains above 80'C and with the engine running when fully warm, if not suspect the thermostat.

Note: When in doubt, I replace both


Hope this helps,

drpeter

 

[Speedparts]

Guys! Thanks for the answers , it turns out to be a thermostat afterall...

I didnt excpect that , because the Insturment cluster was showing Wrong Coolant Temp but the ECU ,correct coolant temp ?!? I thought if it was thermostat ,both would be low or up .
Do they read from different sensors ?