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Home >> Audi >> 2007 >> A4 Base, 2D Convertible >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Fuel Supply System >> 20 - Fuel supply system >> Fuel supply system, vehicles with all wheel drive as of 11.04 >> Fuel Level Sensor 2 G169 , checking

Fuel Level Sensor 2 G169 , checking

Special tools, testers and auxiliary items required 

Fig 1: Portable Multimeter V.A.G 1526C
GW00000696Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig 2: Identifying Connector Test Set V.A.G 1594 C
GW00000525Courtesy of VOLKSWAGEN UNITED STATES, INC.

Test sequence 

Fig 3: Removing Cover Bolts For Locking Flange
GW00014428Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig 4: Disconnecting Electrical Harness Connector At Left Locking Flange
GW00018628Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig 5: Connecting Hand Multimeter V.A.G 1526 B Between Terminal For Resistance Measurement
GW00018617Courtesy of VOLKSWAGEN UNITED STATES, INC.
Sensor installed Sensor at lower stop Sensor at upper stop
Fuel Level Sensor 2 G169 275 to 296 Ω 47 to 65 Ω
NOTE:
  • If measured value is 0 Ω there is a short circuit. If measured value is ∞ Ω there is and open circuit in the wiring.
  • To check resistance values "tank full" or "tank empty" , the Fuel Level Sensor 2 G169 must be removed → Fuel Level Sensor 2 G169 , removing and installing  and the sensor floater must be placed in upper or lower end position.
  • With Fuel Level Sensor 2 G169 removed, the following values are obtained because of the greater deflection of the floater arm:
Sensor removed Sensor at lower stop Sensor at upper stop
Fuel Level Sensor 2 G169 295 to 305 Ω 45.5 to 48.1 Ω