VW Tech Tips

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TT 07-68
2006 Touareg V8 ONLY; A/C Not Blowing Cold
If the air conditioning is not blowing cold, an update is available for the Climatronic control module. Currently, this is available only through the Software Version Management (SVM) feature in Guided Fault Finding. Please use unit code “20B0” when entering the SVM. Any questions concerning update using the SVM please see TB 01-07-35 (ELSA instance 2014603).


TT 07-72
All Models; Software Updates
When performing a software update to a TCM or an ECM, the gearshift position selector must be in park. If you try to perform an update with the gearshift in the neutral position you will get an error message that reads” PRE CONDITIONS NOT MET / IMMOBILIZER IS NOT ENABLED”. To resolve this concern, be sure you have the vehicle in park and attempt the procedure again.

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TT 07-78
2008 Touareg – GFF NOT Available for TPMS
At this time Guided Fault Finding (GFF) does not have function tests for the 2008 Touareg Tire Pressure Monitoring System (TPMS). Until GFF is updated with CD version 79, use the 2007 Touareg TPMS function tests from the current CD.


TT 07-79
All Models – Motorola bluetooth Installations
Effective immediately Volkswagen of America will no longer provide technical support for the installation or repair of Motorola Bluetooth Hands-Free kits. Contact Motorola at 1-800-336-3998 ext. 250 or www.autocraft.com for assistance on remaining kits

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TT 07-81
2005-2008 Touareg - “Engine Hood Open” Warning Light
If the dash panel “Engine Hood Open” warning light illuminates, perform the hood latch adjustment procedure, closely following each step. In ElsaWeb, several steps are necessary to properly position the hood. Also, the hood switch wiring is in series with the radio anti-theft micro switch on non- navigation vehicles. Push in the radio to ensure it is locked into position tightly. Then check for the “Engine Hood Open” warning light

TT 07-87
2006 – 2007 Touareg – Scan Tool Update
With Scan tool update 10.77.00, some procedures may not run correctly. Try switching to “guided functions” and set up the vehicle as a 2005 model. All functions should then work properly. This issue will be corrected with the next brand update CD.

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TT 07-88
2004 – 2007 Touareg – Main/Primary Fuel Pump Location
The main/primary fuel pump location depends on the type of engine the vehicle is equipped with. On the V6 engine, the primary pump is located on the left (driver’s) side of the fuel tank. On the V8 engine, the primary pump is located on the right (passenger’s) side of the fuel tank. Location of the main fuel pump can also be determined by restarting the engine (if possible) then checking to see which pump continues to run after 30 seconds. The secondary pump will shut off after 30 seconds and will not run until needed. The main pump contains the pressure regulator and the secondary pump contains the fuel filter.

TT 07-90
2005 – 2008 All Models with Premium 7 Radio – Speed Dependent Volume Operation
Certain criteria need to be met in order for the speed dependent volume to operate properly:

* The speed dependent volume setting must be turned on.
* The radio volume needs to be at half of the adjustment level or higher
* The vehicle speed needs to be 60mph or faster.

When these conditions are met the radio will increase in volume. The amount of increased volume will depend on which setting is selected, a 1 being the least amount of boost, a 3 being the greatest.Please see the owner’s manual for speed dependent volume turn on and set up.

TT 07-91
2008 Touareg – Service Interval
Currently Service Interval “adaptation” has to be carried out through Vehicle Self Diagnosis. Enter address “17” for the instrument cluster then go into “adaptation”. Channel 40 is for the number of miles and channel 41 is for the number of days.

[Depiry]

TT 07-97
ALL Models – Transmission Fluid

Be advised there are currently five different types of transmission fluids currently used by Volkswagen. These fluids are NOT interchangeable and could cause internal damage if mixed. Please consult the latest workshop instructions listed in ELSA for proper fluid usage

TT 57-07-42
2008 Vehicles equipped with Keyless Entry
The instrument cluster will show a message stating multiple keys are in the vehicle if two or more keys are in the vehicle at one time. This is considered normal. At this time, no specific reference in the owner's manual states this. However, page 39 in the Controls & Equipment section, explains how the vehicle will lock if a key is left in the vehicle and whether or not the driver has a second key in his or her possession. It is not recommended to leave a key inside the vehicle.

TT DW-02-19
Diesel Vehicles, Fuel Filter Drainage
On TDI engines there is a fuel filter that contains an incorporated fuel and water separator, so whenever you do maintenance on such vehicles, always make sure to refer to the maintenance schedule about the draining periodicity. The total water capacity is very limited and should be drained periodically. This could avoid some injection pump failure and costly replacement.

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TT 87-07-93
2004>Touareg, Phaeton; 2006>Passat, Jetta, GTI; 2007 Rabbit, EOS - A/C Compressor Shut Off Codes
If the A/C compressor is commanded “off” by the control head for any reason, it may trigger a shut off code in a MVB. Check MVB 13 field 1 for Touareg and Phaeton systems and MVB 1 field 1 for all other vehicles listed. This includes 2006 and up Climatic systems. See chart below for explanation of these codes to aid with diagnosis of the system.
A/C cut-off Codes
0 = Compressor on (no shut-off requirement of the A/C compressor detected)
1 = Compressor off (refrigerant pressure was or is too high)
2 = Compressor off (blower motor circuit)
3 = Compressor off (refrigerant pressure was or is too low)
4 = Compressor off (display not currently intended)
5 = Compressor off (no engine start or no engine speed detected)
6 = Compressor off (A/C system switched off, ECON-mode activated)
7 = Compressor off (A/C system switched off, blower switch in position 0)
8 = Compressor off (outside temperature was less than 1.5°C and is still less than 2.5 °C)
9 = Compressor off (display not currently intended)
10 = Compressor off (Low voltage)
11 = Compressor off (display not currently intended)
12 = Compressor off (shut-off request from Engine Control Module (ECM) via CAN)
13 = Compressor off (voltage supply terminal 30 too high)
14 = Compressor off (Evaporator Temperature)
15 = Compressor off (display not currently intended)
16 = Compressor off (activation A/C Compressor Regulator Valve -N280- implausible)
17 = Compressor off (no signal or implausible signal from High Pressure Sensor -G65-)
18 = Compressor off (engine speed too high at standstill)
19 = Compressor off (shutoff request from Vehicle Electrical System Control Module via CAN)
20 = Compressor off (refrigerant loss-currently V8 Touareg only)
21 = Compressor off (Outside Temp < 2 degrees C, without recirc mode on)
22 = Compressor off (Outside Temp < 2 degrees C, Inside Temp. < 10 degrees C)

TT 24-07-104
All Vehicles - Fault Code 01314-No Communication With ECM
Fault code 01314 for ECM No Communication in other modules does not indicate a faulty ECM. This fault can occur due to poor connections at connectors, relays, fuses, fuse panels, ground points, etc. Using the proper wiring diagram supplied in Elsa Web, thoroughly check for these issues prior to replacing the ECM. Always remember to verify suspected issues using the volt-drop method rather than relying only on resistance measurements.

TT 90-07-92
2006>Passat, 2008 Touareg U.S. Vehicles – Odometer Display
Nov 30, 2007 - UPDATED
The odometer display will change from miles to km/h readings when the vehicle is in motion, then go back to miles when at a stop. This function can be toggled on or offfor the Passat and Touareg (U.S. vehicles equipped with the premium cluster). With the car running, on the cluster, hold the 0.0 reset button down until the odometer display briefly switches from miles to km/h (approximately. 5 seconds). Once the car is in motion, the odometer will switch to km/h. To turn it off, hold the 0.0 button until the odometer switches briefly from miles to km/h and back to miles (approximately. 6 seconds). NOTE: the trip meter will reset briefly to 0 and then go back to its previous value. If the 0.0 button is not held long enough to set the km/h or to turn it off, the trip meter will reset back to 0.

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TT 15-07-75
All Models with VR6 Engines – Upper Timing Chain Noise
In cases of engine noise that is traced to the upper timing chain, bleeding of the tensioner may correct the condition. To bleed the tensioner: (1) Remove tensioner from engine. (2) Submerge tensioner in oil. Ensure the oil feed hole is facing upwards. (3) Use a large pair of non-marring pliers to actuate the piston several times until no air is noticed escaping from the bleed hole. (4) Install tensioner immediately by hand and take care not to damage the chain ramp.



TT 15-01-37
TDI Valve Cover Gasket
The valve cover gasket on the TDI engine is bonded right to the valve cover, and not available separately. The valve cover should only be replaced in the event of a leak. It is possible to reuse the cover if the seal is in good condition.

TT 19-02-11
Coolants, Color Difference
You may have noticed some vehicles arriving at your dealerships with varying colors of coolant. The coolant may be pink, purple or yellow. In all cases only G12 coolant is to be used when adding or replacing coolant in these vehicles. It is important to be aware that the frost protection of these coolants must be measured with a refractometer. The VW tool number is T10007

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TT 87-07-95
2004-2008 Touareg-A/C Blows Colder in One Zone
For complaints regarding the A/C blowing colder in one zone than in another, be sure to check the refrigerant charge level first. A difference as small as 50 grams can cause this concern. After the charge is verified, continue with normal diagnostics if concern is still present

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TT 00-07-87
2006 – 2007 Touareg – Scan Tool Update
With Scan tool update 10.77.00, some procedures may not run correctly. Try switching to “guided functions” and set up the vehicle as a 2005 model. All functions should then work properly. This issue will be corrected with the next brand update CD

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TT 91-07-105
2008 Touareg - Radio Code (Pin) Number Retrieval
The radio pin (code) numbers for the Delphi radio are not located in Measured Value Block (MVB) 81. To obtain the pin (code) number, the radio’s serial number is required and can be retrieved from ElsaWeb by following the steps listed below:
-Enter Vehicle Self Diagnosis
-Select 56 Radio then forward arrow
-Select 001 Identification (Services $1A) Then forward arrow
-Select Expanded Identification Then forward arrow
You will find the serial number under Subassembly or series number. Then enter it in the Geko radio on line
inquiry to acquire the radio’s pin (code) number as out lined in Technical Bulletin 91-07-13.

TT DW-02-19
Diesel Vehicles, Fuel Filter Drainage
On TDI engines there is a fuel filter that contains an incorporated fuel and water separator, so whenever you do maintenance on such vehicles, always make sure to refer to the maintenance schedule about the draining periodicity. The total water capacity is very limited and should be drained periodically. This could avoid some injection pump failure and costly replacement