DTC P0555: Brake booster pressure circuit
caution
Whenever ECU is replaced, ensure that the CAN bus lines are normal.
DTC SET CONDITIONS
The PHEV-ECU sets DTC P0555 when the brake fluid pressure signal is abnormal.
PROBABLE CAUSES
Malfunction of CAN bus line.
Malfunction of the hydraulic unit (integrated with ASC-ECU).
Malfunction of the PHEV-ECU.
DIAGNOSIS
1.
Using scan tool (M.U.T.-IIISE), check whether the other DTC is set.
Check whether the ASC-ECU related DTC is set or not (Refer to GROUP 35C - Diagnostic Trouble Code Chart
).
2.
Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
If the DTC is set, replace the PHEV-ECU DTC (Refer to
).
![[Previous]](../../../buttons/fprev.png)
![[Next]](../../../buttons/fnext.png)
).).