DTC P0A93-346: Inverter Cooling System Performance: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / EV / Trouble Codes.
4. Check if DTCs related to the EV control system are output.

   Result

   Result	Proceed to
   Only P0A93-346 is output, or DTCs other than the ones in the table below are also output.	A
   Any of the following DTCs are also output.	B

   DTC No.	Relevant Diagnosis
   P0A02-719	Motor Electronics Coolant Temperature Sensor Circuit Low
   P0A03-720	Motor Electronics Coolant Temperature Sensor Circuit High
   P0C73-776	Motor Electronics Coolant Pump "A" Control Performance
   P314A-828	Inverter Coolant Pump Speed Signal

   HINT: 

   P0A93-346 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.

5. Turn the power switch off.

B → See step   12 

A: Go to next step 

1. Check that the front bumper does not have a cover, etc. installed which could block the grill and ducts.

   HINT: 

   • If the grill and ducts of the front bumper are blocked, the inverter coolant temperature could rise and cause this DTC to be output.
   • If a cover, etc. is found when inspecting the vehicle, explain the situation to the customer and then remove the cover after getting the customer's permission.
   • If no cover is found on the vehicle, interview the customer to determine whether or not a cover had been installed previously. If a cover had been installed previously, explain to the customer that the grill and ducts of the front bumper should not be blocked.

NEXT: Go to next step 

NG → CONNECT SECURELY 

OK: Go to next step 

B → ADD EV COOLANT 

C → REPAIR COOLANT LEAK AND ADD COOLANT 

A: Go to next step 

NG → CORRECT THE PROBLEM 

OK: Go to next step 

NG → See step   13 

OK: Go to next step 

1. Turn the power switch off and leave the vehicle for at least 1 hour.
2. Connect the Techstream to the DLC3.
3. Turn the power switch on (IG).
4. Enter the following menus: Powertrain / EV / Data List.
5. Select "Inverter Coolant Water Temperature" and "Motor Inverter Temperature" in the Data List.
6. Read the Data List.

   Result

   Result	Proceed to
   The difference between "Inverter Coolant Water Temperature" value and "Motor Inverter Temperature" value is smaller than 20°C (36°F)	A
   The difference between "Inverter Coolant Water Temperature" value and "Motor Inverter Temperature" value is 20°C (36°F) or more.	B

7. Turn the power switch off.

B → See step   11 

A: Go to next step 

B → See step   10 

A: Go to next step 

NEXT → END