Relative compression test, make the car crank but not start

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   #1  

TregR5

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I have a 2005 Touareg with R5 engine and I want to perform a relative compression test. Therefore I need to make the car crank but not start. Is it possible to do something in VCDS to prohibit the car from starting?
 
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TregR5

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Oh hello, sorry, was maybe a little fast posting my question without any introduction. A little info about me: I have cars and motorbikes as a hobby and are interested in car/motorcycle diagnostics. I have now put my VCDS serial number, in my profile. I dont need to scan my car, but are interested if VCDS are able to prohibit my car from starting when cranking it. Do you know if it is possible and if so, what the procedure is? I am going to take a relative compression test with my oscilloscope so therefore i need to crank for some seconds. Thanks.
 
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Viking

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The requirement for an autoscan is so that people know what hardware and such related stuff your particular car has. One answer for one person may not be relevant to another person with a similar car.
 
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TregR5

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The requirement for an autoscan is so that people know what hardware and such related stuff your particular car has. One answer for one person may not be relevant to another person with a similar car.
Thanks for the information. I will do the auto scan tomorrow and post the result.
 
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DGMotors

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Unplug crank/cam sensors or unplug the PD injector loom where it goes into the cylinder head - it will throw fault codes but you have VCDS to remove them after.
 
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TregR5

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I got a bit delayed with the job but now I have performed it.
Unplug crank/cam sensors or unplug the PD injector loom where it goes into the cylinder head - it will throw fault codes but you have VCDS to remove them after.
I did unplug the PD injector loom and was then able to crank for as long as needed, thank you! The concern I have is a P0304 fault code which was the initial reason I wanted to perform a relative compression test. Is this cylinder no.4 or is it cylinder no.4 in the firing sequence (which is cylinder no.5)? Does anyone have an idea what might set this fault code? The results from the relative compression test seems ok, but I have not performed it a lot of times. I notice that the engine starts vibrating, which off course seems natural since one of the cylinders does not fire properly, when the fault code is set. It seems that this happens when engine are "semi warm", not at cold state and not at fully warm state. Attached is the report from the auto-scan.


Code:
Sunday,12,May,2019,16:26:23:46421
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 18.9.1.0 (x64)
Data version: 20190114 DS296.0
www.Ross-Tech.com


VIN: WVGZZZ7LZ5D001609   License Plate: 
Mileage: 196740km-122248mi   Repair Order: 



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


Chassis Type: 7L (7L - VW Touareg (2003 > 11/2006))
Scan: 01 02 03 05 06 08 09 11 13 15 16 17 18 19 1C 22 29 32 34 36
          37 39 3C 46 47 55 56 57 64 65 68 69 6C 6D 6E 75 76 77
 
VIN: WVGZZZ7LZ5D001609   Mileage: 196740km-122248miles
-------------------------------------------------------------------------------
Address 01: Engine        Labels: Redir Fail!
   Part No SW: 070 997 016 E    HW: 028 101 125 8
   Component: R5 2,5L EDC G001AG  9769  
   Revision: 12345678    Serial number: VWZ3Z0D1205352
   Coding: 0011175
   Shop #: WSC 31414 000 00000
   VCID: 1C37968EDC1E92AA21-515E

2 Faults Found:
16502 - Engine Coolant Temp. Sensor (G62) 
            P0118 - 000 - Signal too High - Intermittent
             Freeze Frame:
                    RPM: 1554 /min
                    Torque: 202.5 Nm
                    Speed: 44.0 km/h
                    Load: 31.0 %
                    Voltage: 14.36 V
                    Bin. Bits: 00001000
                    Temperature: 47.7°C
                    Temperature: 36.9°C

16688 - Cylinder 4 
            P0304 - 000 - Misfire Detected
             Freeze Frame:
                    RPM: 756 /min
                    Torque: 102.5 Nm
                    Speed: 0.0 km/h
                    Load: 0.0 %
                    Voltage: 13.91 V
                    Inj. Quantity: 2.96 mg/str
                    Temperature: 51.3°C
                    (no units): 0.0

Readiness: 0 0 0 X 1 

-------------------------------------------------------------------------------
Address 02: Auto Trans        Labels: 09D-927-750.clb
   Part No: 09D 927 750 BP
   Component: AL 750 6A           0560  
   Coding: 0004136
   Shop #: WSC 31414 000 00000
   VCID: 7DF1BB0A27443BA2B6-515E

No fault code found.

-------------------------------------------------------------------------------
Address 05: Acc/Start Auth.        Labels: 3D0-909-13x-05.lbl
   Part No SW: 3D0 909 135 J    HW: 5WK 470 21
   Component:    Kessy            6400  
   Coding: 0000232
   Shop #: WSC 31414 000 00000
   VCID: 2C57464E8CBE622A51-515E

   Subsystem 1 - Part No: 4E0 905 852 D
   Component: ELV                 1834

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 7L6-907-040.clb
   Part No: 7L6 907 040 H
   Component: CLIMAtronic R/L   X 3716  
   Coding: 0000030
   Shop #: WSC 31414 000 00000
   VCID: 3561632A5FF423E23E-5140

3 Faults Found:
02193 - Supply Voltage for Regulator for Fresh Air Blower 
            010 - Open or Short to Plus
00353 - Function Return Message from Fresh Air Blower Regulator 
            002 - Lower Limit Exceeded - Intermittent
             Freeze Frame:
                    Voltage: 14.40 V
                    Voltage: 11.83 V
                    Voltage: 0.00 V
                    Voltage: 14.00 V

01592 - Air Quality Sensor (G238) 
            014 - Defective
             Freeze Frame:


-------------------------------------------------------------------------------
Address 09: Cent. Elect.        Labels:. 7Lx-937-049-V1.clb
   Part No: 7L6 937 049 K
   Component:                     2703  
   Coding: 0103677
   Shop #: WSC 00795 218 05193
   VCID: 44870EEE042E8A6AB9-515E

1 Fault Found:
00907 - Intervention load Management 
            000 -  - 

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 3D0-909-601.lbl
   Part No: 3D0 909 601 E
   Component: 0B Airbag 8.4E+ H10 0951  
   Coding: 0012354
   Shop #: WSC 31414 000 00000
   VCID: 2541B36AEF5453628E-5140

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 7L6-953-549.lbl
   Part No: 7L6 953 549 D
   Component: Lenksäulenmodul     3301  
   Coding: 0000031
   Shop #: WSC 31414 000 00000
   VCID: 408F02FE1036964A9D-5140

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 7L6-920-xxx-7LA.lbl
   Part No: 7L6 920 880 M
   Component: KOMBIINSTRUMENT RB8 2935  
   Coding: 0005111
   Shop #: WSC 00795 218 92423
   VCID: 418907FA1B3C9F4292-5140

No fault code found.

-------------------------------------------------------------------------------
Address 18: Aux. Heat        Labels: 7L6-819-008.clb
   Part No: 7L6 815 071 B
   Component: Standheizung  E1MAC 0235  
   Coding: 0000000
   Shop #: WSC 00000 000 00000
   VCID: 3169573AAB9C0FC262-5140

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels: 6N0-909-901-19.lbl
   Part No: 6N0 909 901 
   Component: Gateway K<>CAN      0101  
   Coding: 0000006
   Shop #: WSC 31414 000 00000
   VCID: 70EF923E601646CA2D-5140

No fault code found.

-------------------------------------------------------------------------------
Address 22: AWD        Labels: None
   Part No: 0AD 927 755 BE
   Component: TRANSFERCASE        0122  
   Shop #: WSC 00000 000 00000
   VCID: 7F0D41022D4829B2A4-5140

No fault code found.

-------------------------------------------------------------------------------
Address 29: Left Light        Labels: 3D0-909-157.lbl
   Part No: 3D0 909 157 
   Component: EVG GDL+AutoLWR(l)  0001  
   Coding: 0000003
   Shop #: WSC 31414 000 00000
   VCID: 66C3F46652D2987A47-5140

No fault code found.

-------------------------------------------------------------------------------
Address 34: Level Control        Labels: 7Lx-907-553-34.clb
   Part No: 7L0 907 553 F
   Component: LUFTFDR.-CDC- 3C3P1 3081  
   Coding: 0015521
   Shop #: WSC 31414 000 00000
   VCID: 3663642642F228FA37-5140

No fault code found.

-------------------------------------------------------------------------------
Address 36: Seat Mem. Drvr        Labels: None
   Part No: 7L0 959 760 
   Component: Sitzverstellung     0702  
   Shop #: WSC 00000 000 00000
   VCID: 77FDA922057811F2EC-5140

No fault code found.

-------------------------------------------------------------------------------
Address 37: Navigation        Labels: 7L6-919-887-CD.lbl
   Part No: 7L6 919 887 B
   Component:      Navigation     0629  
   Coding: 0000002
   Shop #: WSC 31414 000 00000
   VCID: 458113EA0F14B362AE-5140

No fault code found.

-------------------------------------------------------------------------------
Address 39: Right Light        Labels: 3D0-909-158.lbl
   Part No: 3D0 909 158 
   Component: EVG GDL+AutoLWR(r)  0001  
   Coding: 0000003
   Shop #: WSC 31414 000 00000
   VCID: 67DDF96255D881727C-5140

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels: 7L0-959-933.lbl
   Part No: 7L0 959 933 G
   Component: 1N HSG              3213  
   Coding: 0000065
   Shop #: WSC 00490 218 186825
   VCID: 408F02FE1036964A9D-4AE8

   Subsystem 1 - Part No: 7L0 959 701 A
   Component: Tuersteuergeraet FS 0201

   Subsystem 2 - Part No: 7L0 959 702 A
   Component: Tuersteuergeraet BF 0201

   Subsystem 3 - Part No: 7L0 959 703 
   Component: Tuersteuergeraet HL 0201

   Subsystem 4 - Part No: 7L0 959 704 
   Component: Tuersteuergeraet HR 0201

   Subsystem 5 - Part No: 7L0 907 719 
   Component:    Neigungssensor   0020

   Subsystem 6 - Part No: 7L6 951 171 
   Component: A  Innenraumsensor  0019

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio        Labels: 7L6-035-186-CD.lbl
   Part No: 7L6 035 186 A
   Component:        Radio        0629  
   Coding: 0007447
   Shop #: WSC 31414 000 00000
   VCID: 3169573AAB9C0FC262-5140

2 Faults Found:
00878 - Connection to Speaker Front Left 
            012 - Electrical Fault in Circuit
00881 - Connection to Speaker Rear Right 
            012 - Electrical Fault in Circuit

-------------------------------------------------------------------------------
Address 68: Wiper Electr.        Labels: 7L0-955-119-V1.clb
   Part No: 7L0 955 119 F
   Component: Front Wiper         2416  
   Coding: 0000004
   Shop #: WSC 31414 000 376832
   VCID: 377D692245F8D1F22C-515E

No fault code found.

-------------------------------------------------------------------------------
Address 76: Park Assist        Labels: None
   Part No: 7L0 919 283 E
   Component: 0E Einparkhilfe     0907  
   Shop #: WSC 00000 000 00000
   VCID: 387F6A1E48E6DE8A25-515E

No fault code found.

-------------------------------------------------------------------------------
Address 77: Telephone        Labels: Redir Fail!
   Part No: 7L6 035 729 E
   Component: CIB PAH  HW 202 SW  0307  
   Coding: 0000372
   Shop #: WSC 31414 000 00000
   VCID: 387F6A1E48E6DE8A25-515E

No fault code found.

End-------------------------(Elapsed Time: 08:22)--------------------------
 
   #8  

PetrolDave

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I would suggest fixing the G62 fault first and then see again whether the misfire is still present.
 
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   #9  

TregR5

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I am working on the G62 now, the sensor seems to give a stable resistance and it is increasing with decreasing temperatur. Anyone know how likely it could it be that the sensor itself could be intermitently working? I am also very open for suggestions regarding the misfire since I suspect that these two faults codes are separate issues, even though I think it is a good idea to focus on the G62. Thank you.
 
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