17072/P0688/001672

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Contents

17072/P0688/001672 - ECM Power Relay Load Circuit: (J271): Open Circuit

Possible Symptoms

  • Engine Coolant Fan running at full Speed while Ignition is OFF and Engine is COLD (could lead to discharged Battery)

Possible Causes

  • Fuse(s) faulty
  • Power Supply Relay for Engine Control Module (J271) faulty
    • Terminal 87 faulty/hanging
  • Wiring between Engine Control Module (J220) and Power Supply Relay for Engine Control Module (J271) faulty

Possible Solutions

  • Check/Replace Power Supply Relay for Engine Control Module (J271)
  • Check Wiring between Engine Control Module (J220) and Power Supply Relay for Engine Control Module (J271)
  • Check/Replace Engine Control Module (J220)

Special Notes

  • When found in a 2005 through 2007 2.5L NAR (North American Region) (1K) Jetta check the T121/62 (Red/Black) traced power wire to the ECM. If power is missing or a voltage drop is present that wire may be damaged anywhere between 6" and 18" from the connector itself. This will result in no communication in addition to a no-start.



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