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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 >> MOTRONIC Engine Control Module Power Supply Relay - J271-, 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: -- NO:
  • GATHER more information from customer about the complaint.
  • IGNITION: OFF.
  • DISCONNECT: Motronic Engine Control Module Power Supply Relay -J271- from the Fuse box in the engine compartment.
  • IGNITION: ON.
  • CHECK: Motronic Engine Control Module Power Supply Relay -J271- socket terminals 1 and 3 to ground for voltage.
  • IGNITION: OFF.
  • SPECIFIED VALUE: Battery voltage.
-- Were Values obtained?
-- YES: -- NO:
  • CONNECT: Jumper wire Motronic Engine Control Module Power Supply Relay -J271- socket terminals 3 and 5.
  • IGNITION: ON.
  • CHECK: Engine Control Module -J623- harness connector T94 / 3, T94 / 5, and T94 / 6 to ground for voltage.
  • IGNITION: OFF.
  • SPECIFIED VALUE: Battery voltage.
-- Was Value obtained?
-- YES: -- NO:
  • REMOVE: Jumper wire Motronic Engine Control Module Power Supply Relay -J271- socket terminals 3 and 5.
  • CHECK: Motronic Engine Control Module Power Supply Relay -J271- socket terminal 2 to the Engine Control Module -J623- harness connector T94 / 69 for resistance.
  • SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω).
-- Was Value obtained?
-- YES: -- NO:
  • REMOVE: Jumper wire Motronic Engine Control Module Power Supply Relay -J271- socket terminals 3 and 5.
  • REMOVE: Appropriate fuse. Refer to the wiring diagram for correct fuse.
  • CHECK: Downstream (output) side of Appropriate fuse. Refer to the wiring diagram for correct fuse to Engine Control Module -J623- harness connector T94 / 3, T94 / 5, and T94 / 6 for resistance.
  • SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω).
-- Were Values obtained?
-- YES: -- NO:
Refer To The Final Procedure Below;