Testing the system Page 1 of 4 Testing the system Vehicle diagnostic, testing and information system -VAS 5051B- Test sequence Coolant temperature at least 80 °C. Vehicles with automatic gearbox: selector lever in position P or N – Connect vehicle diagnostic, testing and information system -VAS 5051B- and select vehicle system “01 - Engine electronics” from list. Engine must be idling. WARNING Test equipment must always be secured on the rear seat and operated from that position by a second person. If test and measuring instruments are operated from front passenger's seat and the vehicle is involved in an accident, the person sitting in this seat could be seriously injured when the airbag is triggered. Display on -VAS 5051B-: – From list -1- select diagnostic function “04 - Basic setting”. Display on -VAS 5051B-: 1 - Enter display group – Using the keypad -2-, enter “094” to select “Display group 094” and confirm entry with the Q key. vw-wi://rl/A.en-GB.A04.5636.29.wi::37889621.xml?xsl=3 14.01.2014 Testing the system Page 2 of 4 – Activate basic setting by touching key A . Display on -VAS 5051B-: – Increase the engine speed to above 2000 rpm for approx. 10 seconds. – Check specifications in display zones -3- and -4-. Display zones 1234 Display group 94: variable valve timing, bank 1 (right-side) and bank 2 (left-side) Display xxxx rpm --- --- --- Readout Engine speed Variable valve timing Variable valve timing Variable valve timing bank 1 bank 2 Range CS-ctrl ON Test OFF Test OFF CS-ctrl OFF Test ON Test ON Syst. OK Syst. OK Syst. n. OK Syst. n. OK Specification More than 2000 rpm Syst. OK Syst. OK If specified value “Syst. OK” is NOT attained: – Touch the ← key twice. Display on -VAS 5051B-: – From list -1- select diagnostic function “08 - vw-wi://rl/A.en-GB.A04.5636.29.wi::37889621.xml?xsl=3 14.01.2014 Testing the system Page 3 of 4 Read measured value block”. Display on -VAS 5051B-: 1 - Enter display group – Use keypad -2- to enter “090” for “Display group number 090” and confirm by touching the Q key. Display on -VAS 5051B-: Test condition Engine running at idling speed. – Check specifications in display zones -3- and -4-. Display zones vw-wi://rl/A.en-GB.A04.5636.29.wi::37889621.xml?xsl=3 14.01.2014 Testing the system Page 4 of 4 1234 Display group 090: variable valve timing at idling speed Display xxx rpm --- °CA °CA Readout Engine speed Variable valve timing Variable valve timing Variable valve timing bank 1 bank 2 (cylinder bank right- (cylinder bank left- side) side) Specification xxxx rpm CS-ctrl OFF -3...6 °CA -3...6 °CA – Perform test drive. – Check specifications in display zones -3- and -4-. Display zones 1234 Display group 090: variable valve timing when driving Display xxxx rpm --- °CA °CA Readout Engine speed Variable valve timing Variable valve timing Variable valve timing bank 1 bank 2 (cylinder bank right- (cylinder bank left- side) side) Specification xxxx rpm CS-ctrl ON 16...25 °CA 16...25 °CA – Press the ← key to exit from the function “08 - Read measured value block”. If the specifications are not obtained: – Check the camshaft control valves → Chapter. Note If the readout only shows a value between 6.0° CA (crankshaft angle) and 16.0° CA during the test drive, this indicates that the electrical camshaft control valve is working correctly and feeding the oil pressure to the camshaft adjustment mechanism, but the mechanism is not able to reach its end position (possibly because it is not moving freely). vw-wi://rl/A.en-GB.A04.5636.29.wi::37889621.xml?xsl=3 14.01.2014.