P0C3E

HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM: P0C3E-628, P0C41-627: DC / DC Converter Temperature Sensor "B" Range / Performance
P0C41-627 - DC / DC Converter Temperature Sensor "B" Intermittent / Erratic

DESCRIPTION

The MG ECU located in the inverter with converter assembly detects the temperature of the boost converter using the temperature sensor built into the boost converter. If necessary, the MG ECU will limit inverter output to help prevent boost converter overheating. The power management control ECU (HV CPU) also detects malfunctions in the sensor based on the temperature sensor values. The inverter with converter assembly detects malfunctions in the boost converter temperature sensor and its wiring.





INSPECTION PROCEDURE

CAUTION:
- Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
- After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work Hybrid Control System: Precaution.
HINT
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

NOTICE:
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Service Precautions.

PROCEDURE

1. CHECK DTC OUTPUT (HYBRID CONTROL)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(d) Check if DTCs are output.

Result:









HINT
P0C3E-628 or P0C41-627 may be set due to a malfunction which also causes DTCs in the preceding table to be set. In this case, first troubleshoot the output DTCs in the preceding table. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.

(e) Turn the power switch off.

B -- GO TO DTC CHART (HYBRID CONTROL SYSTEM) Hybrid Control System
A -- Continue to next step.

2. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) P0343-747

NG -- CONNECT SECURELY
OK -- Continue to next step.

3. CHECK QUANTITY OF HV COOLANT P0A01

B -- ADD HV COOLANT

C -- INSPECT FOR COOLANT LEAK AND ADD COOLANT
A -- Continue to next step.

4. CHECK COOLANT HOSE P0A01

NG -- CORRECT THE PROBLEM
OK -- Continue to next step.

5. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE ELECTRIC COOLING FAN) P0A01

NG -- CHECK COOLING FAN SYSTEM Cooling Fan Circuit
OK -- Continue to next step.

6. CHECK HV COOLANT (CHECK FOR CONDITIONS THAT MAY HAVE CAUSED FREEZING) P0A01

B -- REPLACE INVERTER WITH CONVERTER ASSEMBLY Components
A -- Continue to next step.

7. REPLACE HV COOLANT P0A01

NEXT -- Continue to next step.

8. CHECK INVERTER WATER PUMP ASSEMBLY P0A01

NG -- REPLACE INVERTER WATER PUMP ASSEMBLY Components

OK -- COMPLETED