Volkswagen Workshop Service and Repair Manuals

Note:

If the throttle valve potentiometer (G69) has been removed and installed or renewed, the automatic gearbox control unit (J217) and the throttle valve potentiometer must be matched to one another .

Special tools, testers and auxiliary items

• ◆ Fault reader V.A.G 1551 with cable V.A.G 1551/3

Test conditions

• ● Throttle valve potentiometer voltage supply OK, checking => Page 24-15 , Item 12 .

Test sequence

• ‒ Connect fault reader V.A.G 1551 and select engine electronics control unit (address word 01); selection is carried out with ignition switched on => Page 01-3 .

• ‒ Input 08 for "Read measuring value block" function and confirm with Q.

• ‒ Input 03 for display group 03 and confirm with Q.

Note:

If something different is indicated on the display:

=> Fault reader operating instructions

• ‒ Check throttle valve angle on idling speed stop, in display zone 3.
       Specification: 5...19 <°
• ‒ Slowly open throttle valve fully and observe angle displayed in display zone 3.
  The figure must increase uniformly over
       the complete range.
• ‒ Check throttle valve angle at full throttle stop in display zone 3.
       Specification: 90...101 <°
• ‒ Press ⇒ button.
• ‒ Input 06 for "End output" and confirm with Q.

If the specifications are not attained or do not increase uniformly:

• ‒ Carry out electrical check, test step 21
  => Page 24-15 , item 12 .