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Ecm Pcm Power Relay Control Circuit Open. How to repair P0685 Volkswagen code Engine Control Module Power Relay Control Circuit Open. Diagnostic Procedure with Diagnostic Trouble Code DTC DTC P0685 ECMPCM POWER RELAY CONTROL CIRCUITOPEN. How to repair P0685 code Engine Control Module Power Relay Control Circuit Open The powertrain relay is a normally open relay. ECMPCM Power Relay Control Circuit Open.
2 Remove the main relay. ECMPCM Power Relay Control Circuit Open. Learn what Engine Control Module Power Relay Control Circuit Open means location and how to repair. Learn what Engine Control Module Power Relay Control Circuit Open means location and how to repair. The other cause of the PCM relay malfunction is an open circuit between the PCM and the power relay. This type or relay usually uses five-wire design.
3 Disconnect the connector from ECM.
The PCM powertrain control module also known as ECM or engine control module in other vehicle makes comes with a power relay that provides battery voltage safely to the right PCM circuits. This diagnostic trouble code DTC is a generic powertrain code which means that it applies to all 1996-newer vehicles Honda VW Ford Dodge Chrysler Acura Audi GM etc. 2 Measure the voltage between ECM connector and engine ground. In order to work properly the PCM is supplied with power by a relay which uses a battery voltage signal a ground signal and an ignition switch input signal. The Engine Control Module ECM monitors the power inputs. Diagnostic Procedure with Diagnostic Trouble Code DTC DTC P0685 ECMPCM POWER RELAY CONTROL CIRCUITOPENGo to Step 3.