Hybrid Vehicle Control System

DTC P3115 System Main Relay Malfunction

CIRCUIT DESCRIPTION
The HV ECU checks that the system main relay (No.1, No.2, No.3) is normally operating and detects malfunction.

HINT:
- When using an OBD II scan tool other than TOYOTA hand-held tester, check all the steps.
- When using TOYOTA hand-held tester, confirm the information code and check it.

Detecting Condition:

Wiring Diagram:

Step 1 - 2:

INSPECTION PROCEDURE

CIRCUIT DESCRIPTION
If the system main relay is deposited, it might be impossible to shut down the high voltage system. Therefore, the HV ECU checks the system main relay and stops the system if malfunction is detected.

Detecting Condition:

INSPECTION PROCEDURE
If any of these information codes is output, replace the system main relay.
If one of the information codes above and any of the information codes 224-229 are recorded at the same time, also replace the HV ECU.