volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

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Checking air mass meter potentiometer > < Checking coolant temperature sender

Passat (B3)

Digifant Injection and Ignition System
Digifant injection and ignition system
Checking intake air temperature sender
  • ‒ Connect fault reader V.A.G 1551 and select engine electronics control unit (address word 01); selection is carried out with engine idling.
 
→ Indicated on display:
Rapid data transfer     HELP
Select function XX
  • ‒ Input 08 for "Read measured value block" function and confirm with Q.
 
→ Indicated on display:
Read measured value block     HELP
Input display group number XX
  • ‒ Input 02 for display group 02 and confirm with Q.
 
→ Indicated on display:
(1...4 = Display zones)
Read measured value block 2     ⇒
     1     2     3     4

Note:

If something different is indicated on the display:

=> Fault reader operating instructions

  • ‒ Note intake air temperature figure in display zone 4.
 
V24-0911
  • ‒ → Lift air filter upper part, spray intake air temperature sender (G42) with commercial refrigerant spray and observe temperature reading. Temperature must
         drop.
  • ‒ Press ⇒ key.
  • ‒ In put 06 for "End output" and confirm with Q.

If the temperature figure does not change:

  • ‒ Carry out electrical check, test step 9
    => Page 01-16 , if necessary renew air mass meter for intake air temperature sender (G42) and perform idling check.

Checking air mass meter potentiometer > < Checking coolant temperature sender