DTC P3000-603: HV Battery Malfunction: Procedure

CHECK DTC OUTPUT (HV)

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

Check if DTCs are output.

Result

Result	Proceed to
P3000-603 only is output.	A
DTCs other than P3000-603 are also output.	B

B → See step 4

A: Go to next step

REPLACE HYBRID VEHICLE CONTROL ECU
1. Replace the hybrid vehicle control ECU. Refer to COMPONENTS .
  HINT:
  
  If DTC P3000-603 is output, replace the HV battery. This code indicates that an HV battery cooling system problem exists, and this problem will result in deterioration of the battery due to high temperatures.
NEXT → See step 3
REPLACE HV BATTERY ASSEMBLY. Refer to COMPONENTS
GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART