DTC P0A93-346: Inverter Cooling System Performance [10/2014 - 10/2015]: Procedure

1. Make sure that the front side of the radiator grille is not blocked with anything.
2. Ask the customer if the front side of the radiator grille was blocked with anything.

   Result

   Result	Proceed to
   Not blocked.	A
   Is/was blocked.	B

   HINT: 

   If the radiator grille is blocked, the inverter coolant temperature will increase and this DTC may be stored.

Result: 

B 

IF EQUIPPED, EXPLAIN TO CUSTOMER THAT OPTIONAL COVER WILL BE REMOVED 

Result: 

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
4. Check for DTCs.

   Result

   Result	Proceed to
   P0A93-346 only is output, or DTCs except 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 stored due to a malfunction which also causes DTCs in the preceding table to be stored. 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.

Result: 

B 

GO TO DTC CHART (HYBRID CONTROL SYSTEM) 

(Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2014 - 10/2015] )

Result: 

A 

See step  3

Refer to PROCEDURE - Step 4

Result: 

NG 

CONNECT SECURELY 

Result: 

OK 

See step  4

Refer to PROCEDURE - Step 3

Result: 

B 

ADD HV COOLANT 

Result: 

C 

INSPECT FOR HV COOLANT LEAK AND ADD HV COOLANT 

Result: 

A 

See step  5

Refer to PROCEDURE - Step 4

Result: 

NG 

CORRECT THE PROBLEM 

Result: 

OK 

See step  6

Refer to PROCEDURE - Step 5

Result: 

NG 

CHECK COOLING FAN SYSTEM 

(Refer to Cooling Fan Circuit [10/2014 - 10/2015] )

Result: 

OK 

See step  7

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 / Hybrid Control / Data List / Inverter Coolant Water Temperature, Inverter Temp (MG2), Cnv Tmp (Upper), Cnv Temp (Lower), Inverter Temp (MG1).
5. Read the Data List.

   Result

   Result	Proceed to
   Other than below.	A
   "Inverter Coolant Water Temperature" value is higher than the displayed temperature of any other Data List item by 20°C (36°F) or more.	B

   NOTE:

   The lower limit temperature that can be displayed for "Inverter Temp (MG1)", "Inverter Temp (MG2)", "Cnv Tmp (Upper)" and "Cnv Temp (Lower)" is 15°C (59°F). The lower limit temperature for "Inverter Coolant Water Temperature" is -40°C (-40°F). The "Inverter Coolant Water Temperature" value displayed on the Techstream may be lower than the others, but this is not a malfunction.

6. Turn the power switch off.

Result: 

B 

REPLACE INVERTER WITH CONVERTER ASSEMBLY 

(Refer to COMPONENTS [10/2014 - ] )

Result: 

A 

See step  8

Refer to PROCEDURE - Step 6

Result: 

B 

REPLACE INVERTER WATER PUMP ASSEMBLY 

(Refer to COMPONENTS [10/2014 - ] )

Result: 

A 

See step  9

Refer to PROCEDURE - Step 7