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Home >> Audi >> 2017 >> RS 3 >> Repair and Diagnosis >> External Pages >> Different car >> Section 36 (GENERIC SCAN TOOL [CNTA, CNTC, CNSB] (5 Of 5) -- (A3 SEDAN)) >> Generic Scan Tool >> Diagnosis And Testing >> Diagnostic Procedures >> Can-Bus Terminal Resistance, Checking >> Test Procedure

Test Procedure

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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 
  • IGNITION: OFF.
  • DISCONNECT: Data Bus On Board Diagnostic Interface -J533- harness connector.
  • The Engine Control Module -J623- must remain connected for the following step.
  • CHECK: Data Bus On Board Diagnostic Interface -J533- harness connector terminals 6 to 16 for resistance.
  • SPECIFIED VALUE: 60 - 72 Ω (@ approx. 20° C)  .
-- Was Value obtained?		 -- YES:
  • CONDITION: May be intermittent.
  • 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.
-- NO:
  • GO TO: Step 3.
3 
  • REMOVE: Engine Control Module - J623-. Refer to appropriate Service Information.
  • CHECK: Data Bus On Board Diagnostic Interface -J533- harness connector terminal 6 to the Engine Control Module - J623- harness connector T91 / 80 for resistance.
  • CHECK: Data Bus On Board Diagnostic Interface -J533- harness connector terminal 16 to the Engine Control Module - J623- harness connector T91 / 79 for resistance.
  • SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). 
-- Were Values obtained?		 -- YES:
  • REPLACE: Engine Control Module -J623-. Refer to appropriate Service 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: Data Bus On Board Diagnostic Interface -J533- harness connector for any damaged, pushed-out pins.
  • REPAIR: As necessary.
  • If all electrical connections are OK:
  • REPLACE: Data Bus On Board Diagnostic Interface -J533-. Refer to appropriate Service 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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