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Home >> Audi >> 2012 >> A5 2.0T Quattro, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Generic Scan Tool [CAEB] (Engine DTC Table) (Coupe) >> St Generic Scan Tool >> Diagnosis And Testing >> Diagnostic Procedures >> Fuel Tank Leak Detection Control Module -J909 - / Fuel Tank Pressure Sensor -G400-, Checking >> Test Procedure

Test Procedure

Step Procedure Result / Action to Take
  • PERFORM: Preliminary Check to verify the customers complaint. Refer to PRELIMINARY CHECK .
-- Was Complaint verified?
-- YES: -- NO:
  • GATHER more information from customer about the complaint.
  • REMOVE: Evaporative Canister. Refer to appropriate service information.
  • Plug or Cap off the Fuel Tank Pressure Sensor -G400- hose going to the vent filter.
  • CONNECT: Hand vacuum pump to the Fuel Tank Pressure Sensor -G400- and apply 0.700 bar and see if the vacuum holds.
-- Did the vacuum hold?
-- YES: -- NO:
  • DISCONNECT: Fuel Tank Pressure Sensor -G400- harness connector
  • CHECK: Fuel Tank Pressure Sensor -G400- component connector terminals 1 to 3 for resistance.
  • SPECIFIED VALUE: 18 - 30 Ω (± 5.0 Ω @ approx. 20° C)
-- Was Value obtained?
-- YES: -- NO:
  • IGNITION: ON.
  • CHECK: Fuel Tank Leak Detection Control Module -J909 - harness connector terminal 1 to ground for voltage.
  • IGNITION: OFF.
  • SPECIFIED VALUE: Battery voltage.
-- Was Value obtained?
-- YES: -- NO:
  • REMOVE: Engine Control Module - J623-. Refer to appropriate service information.
  • CHECK: Fuel Tank Leak Detection Control Module -J909 - harness connector terminal 2 to the Engine Control Module - J623- harness connector T94 / 54 for resistance.
  • CHECK: Fuel Tank Leak Detection Control Module -J909 - harness connector terminal 3 to the Engine Control Module - J623- harness connector T94 / 52 for resistance.
  • SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω).
-- Were Values obtained?
-- YES: -- NO:
Refer To The Final Procedure Below;