View source for 17069/P0685

== 17069/P0685 - ECM Power Relay Control Circuit (J271): Open Circuit ==

==== Possible Symptoms ====

* Malfunction Indicator Light (MIL) ON
* Engine doesn't start


==== Possible Causes ====

* Voltage supply issue for ECM
* Faulty ECM Relay (J271)


==== Possible Solutions ====

* Test voltage supply to ECM
** Check wiring and fuses
* Replace Faulty ECM Relay (J271)

====  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.
** Based on 2.5L Jetta feedback over the years a majority look like [http://wiki.ross-tech.com/wiki/images/4/48/Damaged_T121-62_2007_Jetta_2.5L_BGQ_ECM.jpg  this example] however some are damaged further away per this example: [http://wiki.ross-tech.com/wiki/images/4/4c/Damaged_T121-62_2006_Jetta_2.5L_ECM.jpg with the close-up and distant views].
* When found in a Canadian Market (1J) chassis City Golf using engine code BEV, make sure that the B474 splice which powers T121a/62 (''Red/Green'') traced power wire to the ECM isn't corroded.

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[[Category:Fault Codes]]