LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Porsche >> 2004 >> Cayenne S >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> DME 7.1.1 Diagnosis (V8 & V8 Turbo) >> DTC P0686: ECM/PCM Power Relay Control Circuit Low >> ECM/PCM Power Relay Control Circuit Low >> Affected terminals
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Affected terminals

DME control module connector A, pins 23 and 3.

NOTE:
  • NO CLASSIC OUTPUT-STAGE DIAGNOSIS!!
  • The diagnosis compares the voltage used to activate the main relay with the voltage after the relay is activated.