Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
OPERATION
BSW-ECU (master) power supply is provided from the 12V starter battery via ETACS-ECU.
CHECK CONDITION
Electric motor switch is in the ON position.
DIAGNOSTIC FUNCTION AND TROUBLE JUDGMENT
When system voltage remains 16 volts or more, the BSW-ECU (master) will set DTC C2329.
TROUBLESHOOTING HINTS
12V starter battery failure
Malfunction of charging system
Malfunction of BSW-ECU (master)
DIAGNOSIS
1. Using scan tool (M.U.T.-IIISE), read the PHEV-ECU DTC (Check whether a DTC, which is associated with the on-board charger/DC-DC converter, is set in the PHEV-ECU. (Refer to GROUP 54Da - PHEV-ECU, Diagnostic Trouble Code Chart ).
2. Using scan tool (M.U.T.-IIISE), read the BSW-ECU (master) DTC again.
![[Previous]](../../../buttons/fprev.png)
![[Next]](../../../buttons/fnext.png)
).