STEP 1. Voltage measurement at PHEV-ECU connector (terminal VCSP).
(1) Measure the PHEV-ECU connector side by backprobing.
(2) Measure the voltage between the PHEV-ECU connector (terminal VCSP) and body ground.OK: 4.9 - 5.1 volts (Power supply voltage)
Is the check result normal?
Replace the brake booster vacuum sensor (Refer to GROUP 35A - Master Cylinder Assembly and Brake Booster Assembly ). Go to Step 2.
STEP 3. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
Recheck the DTC.(1) Erase the DTC.
(2) Turn off the power supply mode of the electric motor switch.
(3) Turn on the power supply mode of the electric motor switch.
(4) Check the DTC.
Is the DTC set?
Replace the PHEV-ECU (Refer to ). The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).