DTC P0C3E-628: DC / DC Converter Temperature Sensor "B" Range / Performance; DTC P0C41-627: DC / DC Converter Temperature Sensor "B" Intermittent / Erratic: Procedure

WARNING: This page is about a different variant/trim than selected.

CHECK DTC OUTPUT (HV)

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

Check if DTCs are output.

Result

Result	Proceed to
P0C3E-628 or P0C41-627 is output.	A
Any of the following DTCs are also output.	B

DTC No.	Relevant Diagnosis
P0A93-346	Inverter Cooling System Performance
P0C73-776	Motor Electronics Coolant Pump "A" Control Performance
P314A-828	Inverter Coolant Pump Speed Signal

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.

Turn the ignition switch off.

B → See step 9

A: Go to next step

CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR). Refer to PROCEDURE - Step 4
NG → CONNECT SECURELY

OK: Go to next step
CHECK QUANTITY OF HV COOLANT. Refer to PROCEDURE - Step 3
B → See step 10

C → See step 11

A: Go to next step
CHECK COOLANT HOSE. Refer to PROCEDURE - Step 4
NG → CORRECT THE PROBLEM

OK: Go to next step
PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE ELECTRIC COOLING FAN). Refer to PROCEDURE - Step 5
NG → See step 12

OK: Go to next step
CHECK HV COOLANT (CHECK FOR CONDITIONS THAT MAY HAVE CAUSED FREEZING). Refer to PROCEDURE - Step 6
B → See step 13

A: Go to next step
REPLACE HV COOLANT. Refer to PROCEDURE - Step 7
NEXT: Go to next step
CHECK INVERTER WATER PUMP ASSEMBLY (W/ MOTOR). Refer to PROCEDURE - Step 8
NG → See step 14

OK → COMPLETED
GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART
ADD HV COOLANT. Refer to REPLACEMENT - Step 3
INSPECT FOR COOLANT LEAKS AND ADD COOLANT. Refer to REPLACEMENT - Step 4
CHECK COOLING FAN SYSTEM. Refer to Cooling Fan Circuit
REPLACE INVERTER WITH CONVERTER ASSEMBLY. Refer to REMOVAL
REPLACE INVERTER WATER PUMP ASSEMBLY (W/ MOTOR). Refer to REMOVAL