DTC P0687 ECM Power Relay Control Circuit High (4JJ3 with DPD)

1. DTC P0687 description

The ECM main relay is energized in order to supply battery power to the ECM through the relay switch side when the ECM receives an ignition switch ON signal. When the ignition switch turns OFF, voltage application to the ECM main relay stops after a predetermined length of time has passed. If the ECM detects that the ECM main relay is still ON when the ECM main relay is commanded OFF, the DTC is set.

2. Condition for setting DTC P0687

Condition for setting the DTC

  • The ECM detects that the ECM main relay turns ON when the relay is commanded OFF.

3. Action taken when DTC P0687 sets

  • The ECM illuminates the SVS indicator light. Refer to Action taken when DTC sets - Type C.

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC type definitions".

4. Condition for clearing DTC P0687

  • Refer to Condition for clearing the SVS indicator light/DTC - Type C.

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC type definitions".

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