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
- Euro4: The ECM illuminates the SVS indicator light. Refer to Action taken when DTC sets - Type C (Euro4).
- Except Euro4: The ECM illuminates the check engine warning light. Refer to Action taken when DTC sets - Type A (Except Euro4).
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC type definitions".
4. Condition for clearing DTC P0687
- Euro4: Refer to Condition for clearing the SVS indicator light/DTC - Type C (Euro4).
- Except Euro4: Refer to Condition for clearing the check engine warning light/DTC - Type A or Type B (Except Euro4).
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC type definitions".