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Home >> Audi >> 2013 >> S7 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> 4.0L - Generic Scan Tool - Engine Code(S): CEUC & CRDB (Transmission DTC Table & Diagnostic Procedures) >> St Generic Scan Tool >> Diagnosis And Testing >> Diagnostic Procedures >> Fuel Tank Leak Detection Control Module -J909- & INTEGRATED Fuel Tank Pressure Sensor -G400-, CHECKING >> Test Procedure
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Test Procedure

Step Procedure Result / Action to Take
1
  • PERFORM: Preliminary Check to verify the customers concern. Refer to PRELIMINARY CHECK
-- Was concern verified?
-- YES:
  • GO TO: Step 2
-- NO:
  • Gather more Information from customer about the concern
2
  • IGNITION: OFF
  • DISCONNECT: Fuel Tank Leak Detection Control Module -J909- / Fuel Tank Pressure Sensor -G400- connector.
  • CHECK: Fuel Tank Leak Detection Control Module -J909- / Fuel Tank Pressure Sensor -G400- component connector terminals 1 to 2 for resistance.
  • SPECIFIED VALUE: 40 KΩ (± 10 KΩ @ approx. 20° C)
  • CHECK: Fuel Tank Leak Detection Control Module -J909- / Fuel Tank Pressure Sensor -G400- component connector terminals 3 to 2 for resistance.
  • SPECIFIED VALUE: 325 KΩ (± 20 KΩ @ approx. 20° C)
-- Were Values obtained?
-- YES:
  • GO TO: Step 3
-- NO:
  • REPLACE: Fuel Tank Pressure Sensor -G400-. Refer to appropriate repair information.
  • GO TO: Step 5
3
  • IGNITION: ON
  • CHECK: Fuel Tank Pressure Sensor -G400- / Fuel Tank Lead Detection Control Module -J909- connector terminals 1 to ground for voltage.
  • IGNITION: OFF
  • SPECIFIED VALUE: Battery voltage
-- Was Value obtained?
-- YES:
  • GO TO: Step 4
-- NO:
  • CHECK: wiring for open, high resistance, short or connector for damage, corrosion, loose or broken terminals
  • REPAIR: faulty wiring or connector
  • REPLACE: any open Fuses
  • GO TO: Step 5
4
  • CHECK: Fuel Tank Pressure Sensor -G400- connector terminal 2 to Engine Control Module -J623- connector terminals T91 / 89 for resistance.
  • CHECK: Fuel Tank Pressure Sensor -G400- connector terminal 3 to Engine Control Module -J623- connector terminals T91 / 69 for resistance.
  • SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω)
-- Was Value obtained?
-- YES:
  • REPLACE: Engine Control Module -J623-. Refer to the Repair Information.
  • GO TO: Step 5
-- NO:
  • CHECK: wiring for open, high resistance, short or connector for damage, corrosion, loose or broken terminals
  • REPAIR: faulty wiring or connector
  • REPLACE: any open Fuses
  • GO TO: Step 5
5
  • Final Procedure
  • Perform a road test to verify repair.
  • Do any DTC's return:
-- YES: -- NO:
  • Repair is complete, Generate readiness code. Refer to READINESS CODES .
  • Return vehicle to Customer