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Home › Audi › 2016 › A7 Quattro TDI Premium Plus › Repair and Diagnosis › Engine Performance › Engine Control Systems › Engine System & Transmission System (Diagnostics - TDI 3.0L - CPNB) › St Generic Scan Tool › Diagnosis And Testing › Diagnostic Procedures › Reducing Agent Metering System Control Module -J880-, CHECKING › Test Procedure

Test Procedure

Step Procedure Result / Action to Take
1
  • PERFORM: Preliminary Check to verify the customers complaint. Refer to PRELIMINARY CHECK .
-- Was Complaint verified?		 -- YES:
  • GO TO: Step 2
-- NO:
  • GATHER more information from customer about the complaint.
2 
  • DISCONNECT: Reducing Agent Metering System Control Module -J880- harness connector.
  • IGNITION: ON.
  • CHECK: Reducing Agent Metering System Control Module -J880- harness connector terminal 1 to 8 for voltage.
  • SPECIFIED VALUE: Battery voltage.
  • IGNITION: OFF.
-- Was Value obtained?		 -- YES:
  • GO TO: Step 3
-- NO:
  • PERFORM: Visual Inspection of wiring and component.
  • CHECK: Wiring for open, high resistance, short or harness connector for damage, corrosion, loose or broken terminals.
  • REPAIR: Faulty wiring or connector.
  • GO TO: Step 4
3 
  • DISCONNECT: Data Bus On Board Diagnostic Interface -J533-. Refer to appropriate repair information.
  • CHECK: For A6, A7, Reducing Agent Metering System Control Module -J880- harness connector T8 / 1 to the Data Bus On Board Diagnostic Interface -J533- harness connector T32 / 5 for resistance.
  • CHECK: For A6, A7, Reducing Agent Metering System Control Module -J880- harness connector T8 / 3 to the Data Bus On Board Diagnostic Interface -J533- harness connector T32 / 21 for resistance.
  • SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω).
-- Were Values obtained?		 -- YES:
  • REPLACE: Reducing Agent Metering System Control Module -J880-. Refer to appropriate repair information.
  • GO TO: Step 4
-- NO:
  • PERFORM: Visual Inspection of wiring and component.
  • CHECK: Wiring for open, high resistance, short or harness connector for damage, corrosion, loose or broken terminals.
  • REPAIR: Faulty wiring or connector.
  • GO TO: Step 4
4 
  • Final Procedure 
  • Perform a road test to verify repair.
-- Does the original DTC return?		 -- YES:
  • CHECK: Engine Control Module -J623- harness connector for any damaged, pushed-out pins.
  • REPAIR: As necessary.
  • If all electrical connections are OK:
  • REPLACE: Engine Control Module -J623-. Refer to appropriate repair information.
  • Clear the DTC's. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
  • Repair is complete. Generate Readiness Code. Refer to READINESS CODE .
  • Return vehicle to Customer.
-- NO:
  • Perform the diagnostic procedure for any DTC's.
  • If no DTC's return the repair is complete.
  • Return vehicle to customer.
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