A4 TDI engine measuring blocks/groups

MOGolf

Top Post Dawg
Joined
Jun 27, 2001
Location
underneath something
TDI
2001 Golf GLS TDI Reflex silver, rough road suspension and steel skid plate, 2004 Passat Variant, Candy White, rough road suspension and geared balanced shaft module, and much, much more. 2016 LR RR HSE TD6.
Based on the Bentley CD but includes other groups not documented there. Actual labels/values displayed may vary.

Group 000 measuring blocks

From left to right

Engine idle speed: range 42 - 45 = 870-950
Start of injection: range 12 - 75 = 2 degrees ATDC - 3 degress BTDC
Throttle position: 0 = 0 %
Injection quantity: 11 - 45 = 2.2 - 9.0 mg/stroke
Manifold Absolute Pressure
Atmospheric pressure
Engine coolant temperature: 80 - 35 = 80 - 110 degrees C
Intake Manifold Temperature: 182 - 50 = 10 - 110 degrees C
Fuel Temperature: 91 - 201 = 20 - 80 degrees C
Air mass: 69 - 111 = 230 - 370 mg/H

These are valid ranges only when the EGR is switched on, engine at idle and at least 80C (176F) coolant temp.

Group 001 (injected quantity)

Engine RPM: 870 - 950
Injected quantity: 2.2 - 9.0 mg/H
Modulating piston displacement sensor voltage: 1.450 - 2.000 V
Engine coolant temperature sensor: 80 - 110 C

If below 2.2 - injection is running too rich
If above 9.0 - injection is running too lean, or the engine is cold

If below 1.450 volts - injection too rich
If above 2.000 volts - injection is too lean, or engine is cold

Group 002 (idle speed)

Engine rpm: 870 - 950
Throttle position: 0 = 0
Operating condition: 010
Engine coolant temperature: 80 - 110 C

Throttle should go 0 - 100 depending on pressure applied to "go" pedal
Operating condition left digit: 1 = idle increased because AC is on
Operating condition middle digit: Closed throttle position switch is closed (foot not on pedal)
Operating condition right digit: AC compressor switched on

Group 003 (EGR)

Engine rpm: 870 - 950
Air mass drawn in (specified): 230 - 370 mg/H
Air mass drawn in (actual): 230 - 370 mg/H
EGR vacuum solenoid duty cycle: 40 - 75 %

If air mass specified is above 370, engine too cold.
If air mass actual is below 230 mg/H, excessive EGR or an air leak.
If air mass actual is above 370 mg/H, engine is cold, insufficient EGR, or bad MAF sensor
(Note: EGR is turned off after approximately 2 minutes of idle. Reading should be within that time period.)
If a DTC is present, air mass actual will have a constant value of approx. 550mg/H over the complete RPM and load range.

Group 004 (Start of injection)

Engine rpm: 870 - 950
Start of injection (specified): 2 ATDC - 3 BTDC
Start of injection (actual): 2 ATDC - 3 BTDC
Cold start injector duty cycle: 3 - 80%

If start of injection (specified) is earlier than 3 BTDC, engine too cold.
If start of injection (actual) is before 3 BTDC, engine too cold, injection pump set too advanced, or cold start injector inoperative.
If start of injction (actual) is later than 2 ATDC, injection pump is set too retarded, injection adjustment blocked, or cold start injector inoperative.

Group 005 (starting conditions)

Engine speed
Starting quantity
Start of injection (actual)
Engine coolant temperature

This is not useful for troubleshooting.

Group 006 (test with ignition switch on)

Speed
Brake pedal monitor
Cruise control system
Cruise control system (indicates if activated, 0 = activated but switched off, 1 = activated, swtiched on, 255 = not activated)

Cruise control system left digit: Clutch switch closed (clutch not depressed) = 0, 1 = clutch depressed
Cruise control system middle digit: CC/DFI brake pedal switch open (brake pedal depressed) = 1, 0 = pedal not depressed
Cruise control system right digit: brake light switch depressed pedal = 1, not depressed = 0

Right cruise control system 6 digit display has a 1, left to right, when:
Clutch operated
Brake pedal operated
Resume speed operated on the switch
Acceleration operated on the switch
Cruise control and memory switched off
Cruise controll system switched on

Group 007 (Temperatures)

Fuel Temperature
Nothing
Air intake temperature
Engine coolant temperature

If the car has been sitting overnight (for example) these should all equate to approximately ambient air temperature. If not a sensor may be bad.

If fuel temp indicates -5.4C, there is a short circuit or the sensor is bad/inoperative.
If air temp indicates approx. 136.8C (275F) the air temp sensor is bad/inoperative. Check for a DTC.
If coolant temp sensor indicates a large deviation from ambient temp, there may be a short circuit or the ECT sensor is bad/inoperative.

Group 008

Injection limitation when warm/full throttle/3rd gear @ 3000 RPM

Engine rpm (2900-3100)
Injection quantity requested mg/R (40.0-42.0)
Injection quantity rpm limit mg/R (35.5-36.5)
Injection quantity MAF limit mg/R (36.0-39.0)

Group 009 (injection quantity limitation)

Engine rpm
Injection quantity (cruise control system active)
Injection quantity limit signal from automatic transmission controler during gear change
Nothing

Group 010
Air system warm/full throttle/3rd gear @ 3000 RPM

MAF sensor: 800-1000
Barometric pressure
MAP (boost): 1700-2080
Throttle position %: 100

Group 011
Charge pressure control warm/full throttle/3rd gear @ 3000 RPM

Engine rpm
Specified MAP: 1850-1950
Actual MAP: 1700-2080
MAP Valve DC: 45-95

Group 012

Glow Status
Glow period
Suply voltage from ECM
Engine coolant temperature

Not useful for troubleshooting.

Group 013

This group shows the smooth running control injected quantity cylinder 1 - 4, left to right. Values expected -2.0 - + 2.0 mg/R

This is showing how the ECM is balancing the power for each cylinder at idle to account for variations in component tolerances, jet sizes, compressions, etc.).

Group 015 (fuel consumption)

Engine rpm
Injected quantity (actual)
Fuel consumption
Injection requirement (as indicated by the go pedal)

Group 016 (additional heater)

Generator loading
Additional heater
Activation of heater elements
Voltage supply from ECM

Additional heater display is 8 digit number where, left to right, 1 =
nothing
nothing
ECT sensor inoperative
engine started within the last 10 seconds
engine speed below 870 rpm
battery voltage below 9 volts
generator inoperative
ECT exceeds 70 C-80C (158F - 176F), or intake air temp exceeds 5C (41F)

Activation of heater elements is a 2 digit number. Left digit = 1 when high heat output relay is on. Right digit = 1 when low heat output relay is on.

Group 017 readiness code

Not relevant
binary code: x000xxxx
Not relevant
binary code: 0xxxxxxx

These may represent ready (0) for "Comprehensive component", "Misfire", and "Fuel system" in the first code and "EGR system" in the second. I have not verified.

Group 018

Speed
binary bits: 00
nothing
nothing

Group 019 (Quantity adjuster)

Voltage from modulating piston displacement sensor: 0.500 - 0.970 V
Voltage from piston displacement sensor: 4.150 - 4.740 V
nothing
nothing

If specfied values are out of tolerance, possible malfunction of the injection pump quantity adjuster.

Group 020

Ignition timing
Absolute pressure
Speed
Load

Group 021

Fuel Temperature
Intake Air Temperature
Absolute pressure
Load

Group 022

Binary bits
Unknown
Binary bits
Binary bits

Group 026

An undocumented field

Groups 027-040

nothing in any field

Groups 041-079

Not valid

Group 080

Jibberish

Group 081-085

Nothing in any field

Group 086-124

Not valid

Group 125 CAN bus communiation status

Auto. trans. controller: Transmission 1
ABS status: ABS 1
Instrument status: Instruments 1
Airbag status: Airbag 1

Group 126-129

Nothing in any field

Group 130-255

Not valid

(edited to add undocumented-on-the-CD groups)

<small>[ February 20, 2003, 20:06: Message edited by: MOGolf ]</small>
 

Harvieux

Vendor , w/Business number
Joined
Aug 15, 1998
Location
Whittier,CA-USA
TDI
06 A5 Pkg.2 w/navi & ASEP
Hi MOGolf, Very well done, my friend. This will assist many here, including myself. Later!
 

wolfsburg_de

Ross-Tech AssociateVendor , w/Business number
Joined
Mar 18, 2001
Location
Lansdale, PA USA
TDI
2012 Passat TDI 6MT
Great list!!! Any idea what the undocumented groups are?

I logged groups 008 and 011 on a 2001 Golf TDI and got some interesting fuel and boost readings.
 

MOGolf

Top Post Dawg
Joined
Jun 27, 2001
Location
underneath something
TDI
2001 Golf GLS TDI Reflex silver, rough road suspension and steel skid plate, 2004 Passat Variant, Candy White, rough road suspension and geared balanced shaft module, and much, much more. 2016 LR RR HSE TD6.
With the aid of the latest VAG-COM, I have updated the list for the "missing" groups.

[ August 18, 2002, 18:57: Message edited by: MOGolf ]
 

diesel des

Veteran Member
Joined
Aug 19, 1999
Location
Belfast,NI
Hi thanks for the info. I am haveing problems with trying the adaption in my car. I log in as 12233 and then want to mod the injection timing. I can mod blocks 1,2,3 and 5 but 4 the one I need says its not available. What am I doing wrong? I realise that this could damage my engine etc.. Thanks, Des.
 

therabbittree

Veteran Member
Joined
Feb 20, 1999
Location
Red Hook, NY USA
TDI
B4 passat, 2000 Golf, 2003 Allroad tdi
what about "normal " setting s and "basic setting like in vw tool ? we just did a A4 t belt and using vw in basic setting group or block 00 for 2 and 9 the #2 block reads 0 seems very strange when i switch to "normal setting" it shows a value etc just not in basic it s getting frustrating ha we've adjusted the pump sprocket few times with no change in goup / block 2 from 0..any ideas? its pretty drastic you can have the engine run nice and smooth in normal then switch to basic setting and it smokes white smoke liek cray and idels much rough and stumbles a little so something is fishy...
thanks
deo
 

seaman_12

Member
Joined
Dec 13, 2003
When I get my VAG-COM software next week, I want to perform a tune-up on my '01 Jetta. What are the optimum settings that I should use for this car such as idle speed, timing, etc? I assume these can all be set using the OBDII tool. Are these settings posted elsewhere on this board?

Thanks, Scott
 

Nash_TDI

Veteran Member -TDIClub Enthusiast
Joined
Sep 3, 2002
Location
Louisville, ky
TDI
2000 Silver Jetta TDI
Do you know anything else about measuring block 006. The second digit reads like it should and the third digit always reads 1 no matter if the brake is depressed or not. I have been having trouble forever.
 

ukguy

Veteran Member
Joined
Jul 27, 2004
Location
Manchester, UK
TDI
VW Golf MK6 1.6 TDI Bluemotion Match
we just did a A4 t belt and using vw in basic setting group or block 00 for 2 and 9 the #2 block reads 0 seems very strange when i switch to "normal setting" it shows a value etc just not in basic...
I am having exactly the same thing show up as above, did anyone come up with any explanation for this please. My engine is working fine apart from hesitant cold starts in the mornings!

Many Thanks,

Adam
 

thortdi

Veteran Member
Joined
Sep 28, 2004
Location
Munich, Germany
TDI
2006 Octavia Wagon
Hi,

is there any difference between the values

* "Air intake temperature" Group 7, Value 3
* "Intake Air Temperature" Group 21, Value 2

.. ?

Or better, is there any Measurement block showing the temperature of the charged (turbo) and subsequently cooled (IC) air in the intake manifold ?


I would like to measure how efficient my TDI's intercooler still is.

Thanks !
 

MOGolf

Top Post Dawg
Joined
Jun 27, 2001
Location
underneath something
TDI
2001 Golf GLS TDI Reflex silver, rough road suspension and steel skid plate, 2004 Passat Variant, Candy White, rough road suspension and geared balanced shaft module, and much, much more. 2016 LR RR HSE TD6.
They are the same reading.
There is no sensor between the turbo and the intercooler. Therefore the differential is not known.
 

VWannabe

Veteran Member
Joined
Nov 2, 1999
Location
Lawrenceville, GA USA
On my car, a 1997 Jetta TDI with a 1Z engine, measuring block 13 only shows values for blocks 1, 2, and 3. I am assuming the #4 block is the reference block. Is this correct? Mine are all with the -/+ 2mg value, but the newest injectors I installed are not as close as my old ones were, which was -/+ 0.1 of one another. I am debating on getting them balanced. Is it worth it?
 

MOGolf

Top Post Dawg
Joined
Jun 27, 2001
Location
underneath something
TDI
2001 Golf GLS TDI Reflex silver, rough road suspension and steel skid plate, 2004 Passat Variant, Candy White, rough road suspension and geared balanced shaft module, and much, much more. 2016 LR RR HSE TD6.
ScotterTDI, these are for an ALH. I have gathered data from a PD ECM, but I'm still trying to figure out what some of the blocks mean. I can't seem to find doc on all of them. The North American ECM does not match a European ECM entirely.

VWannabe, the 1Z is an 'A3' chassis. Group 13 does only show 3 blocks for that chassis. 'Worth' is a relative term. You'll have to decide.
 

Torben_DK

New member
Joined
Oct 6, 2003
Location
Denmark - Europe
TDI
Golf 115HK 2000 DarkBlue
Hi MOGolf
Thank you very most for the list, it has started me of with some VASG-COM testing...
I have a Golf TDI PD 115HP, motor code AJM,(in Europe) and most of the reading I get is as in you list. However in Group 000 block two "Start of injection" I get 129.
Does this means that the injection starts all to soone?
Thanks for reply, and sorry for my poor english.
Torben
 

MOGolf

Top Post Dawg
Joined
Jun 27, 2001
Location
underneath something
TDI
2001 Golf GLS TDI Reflex silver, rough road suspension and steel skid plate, 2004 Passat Variant, Candy White, rough road suspension and geared balanced shaft module, and much, much more. 2016 LR RR HSE TD6.
The PD has a different injection system. The numbers related to injection on a ALH engine do not apply to the AJM.
 

Torben_DK

New member
Joined
Oct 6, 2003
Location
Denmark - Europe
TDI
Golf 115HK 2000 DarkBlue
OK thank you for the answer.
Were do I find the data for my car? I have seached the Internet without any luck. Do I need the Bentley CD? were can I get that?
Thanks for answer.
Torben
 

Airliner

Veteran Member
Joined
Jan 15, 2005
TDI
Audi A4 1.9TDi Avant Quattro 2001 silver
The AJM (and ATJ) engine, group 000 block two, the readings should be between 120 and 132, so you are within limits.
 

cmc

Veteran Member
Joined
May 9, 2002
Location
seattle, wa
I think I may have figured this one out.

1) figure out the part number of your PD ECU. i think the program will simply display it.. my car has a ECU number of 038-997-016-C. The VAG-COM program does not have a .lbl file with this designation so it makes a guess as to what .lbl file best matches your US PD100 ECU. It ends up displaying values that don't seem to match the labels.

2) You will find that VAG COM expects a PD 100 to have a ECU id of 038-906-019-?? and has an elaborate system to match it to the correct label file 038-906-019-100.lbl. The US PD100 has a different ECU number and does not end up getting matched to the above. You need to intervene and tell it.

3) To make a long story short, do the following:

- Go to the VAG-COM "labels" subdirectory on your computer where you installed the program.

- Copy or link 038-906-019-100.lbl to 038-997-016-C.lbl

- Description of all the block values are in the file itself

- If your ECU is different from the one I listed, just substitute yours in.

- US PD100 only.. and my ECU may even have a different ID from other US PDs because of several reflashes.

I think this is what the VAG-COM folks would like people to do and then report it back to them with new ECU numbers. Anyway I tried it and I seem to get much more meaningful numbers than before I tried this trick.

ScotterTDI, these are for an ALH. I have gathered data from a PD ECM, but I'm still trying to figure out what some of the blocks mean. I can't seem to find doc on all of them. The North American ECM does not match a European ECM entirely.

VWannabe, the 1Z is an 'A3' chassis. Group 13 does only show 3 blocks for that chassis. 'Worth' is a relative term. You'll have to decide.
 

MOGolf

Top Post Dawg
Joined
Jun 27, 2001
Location
underneath something
TDI
2001 Golf GLS TDI Reflex silver, rough road suspension and steel skid plate, 2004 Passat Variant, Candy White, rough road suspension and geared balanced shaft module, and much, much more. 2016 LR RR HSE TD6.
I have constructed a label file for the North American PD ECM, though the only ones I've seen are -H. It is not certified to be 100% accurate yet. The European ECM label files, though close for some measuring blocks, are for ECMs that are different than what is offered in North America.

I've sent the file to Ross-Tech for distribution with VAG-COM.
 

Beta

Veteran Member
Joined
Feb 7, 2005
Location
Bozeman, Montana
TDI
87 syncro westy alh
Is it possible to turn off the tcu databus controller and the abs controller with the ecu? My alh in vanagon conversion has neither and I always have these two fault codes. Much thanks.
 

Taggs

Active member
Joined
Nov 28, 2004
TDI
Jetta, 2001, Blue
I am looking at my measuring blocks for the first time. In block 13 I got readings the are not balanced at all. #1= .09, #2= .05, #3= .14, #4= .00. As I am new can you please tell me if this is normal. Thanks.
 

dieseldorf

Top Post Dawg
Joined
Oct 11, 2000
Location
MA
TDI
ex- 1996 wagon, ex-2000 Jetta
Taggs said:
I am looking at my measuring blocks for the first time. In block 13 I got readings the are not balanced at all. #1= .09, #2= .05, #3= .14, #4= .00. As I am new can you please tell me if this is normal.
Taggs, was your car FULLY warmed up when you grabbed those readings
 
Top