DTC P0A93-00: Inverter "A" Cooling System Performance [12/2018 - ]: Procedure

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

   Powertrain > Hybrid Control > Trouble Codes 

   Powertrain > Motor Generator > Trouble Codes 

   Powertrain > Engine > Trouble Codes 

   Result

   Result	Proceed to
   P0A93-00 only is output, or DTCs except the ones in the table below are also output.	A
   DTCs of hybrid control system in the table below are output.	B
   DTCs of motor generator control system in the table below are output.	C
   DTCs of SFI system in the table below are output.	D

   TABLE 1
   
   

   Malfunction Content	System	Relevant DTC
   Insulation malfunction	Hybrid control system	P1C7C-49	Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure
   		P1C7D-49	Hybrid/EV Battery Voltage System Isolation (Hybrid/EV Battery Area) Internal Electronic Failure
   		P1C7E-49	Hybrid/EV Battery Voltage System Isolation (Transaxle Area) Internal Electronic Failure
   		P1C7F-49	Hybrid/EV Battery Voltage System Isolation (Direct Current Area) Internal Electronic Failure
   		P1C80-49	Hybrid/EV Battery Voltage System Isolation (Rear Motor Area) Internal Electronic Failure

   TABLE 2
   
   

   Malfunction Content	System	Relevant DTC
   Sensor and actuator circuit malfunction	Hybrid control system	P0C73-96	Motor Electronics Coolant Pump "A" Component Internal Failure
   		P314A-31	Motor Electronics Coolant Pump "A" No Signal
   	Motor generator control system	P0A00-11	Motor Electronics Coolant Temperature Sensor Circuit Short to Ground
   		P0A00-15	Motor Electronics Coolant Temperature Sensor Circuit Short to Battery or Open
   System malfunction	SFI system	P059F-73	Active Grille Air Shutter "A" Actuator Stuck Closed
   		P05A0-72	Active Grille Air Shutter "A" Actuator Stuck Open
   		P05A0-74	Active Grille Air Shutter "A" Actuator Slipping
   		P05A2-11	Active Grille Air Shutter "A" Circuit Short to Ground
   		P05A2-12	Active Grille Air Shutter "A" Circuit Short to Battery
   		P05A2-13	Active Grille Air Shutter "A" Circuit Open
   		P05A2-7E	Active Grille Air Shutter "A" Actuator Stuck On
   		P05A2-7F	Active Grille Air Shutter "A" Actuator Stuck Off
   		P05B1-12	Active Grille Air Shutter "B" Circuit Short to Battery
   		P05B1-14	Active Grille Air Shutter "B" Circuit Short to Ground or Open
   		P05B1-31	Active Grille Air Shutter "B" No Signal
   		U0284-87	Lost Communication with Active Grille Air Shutter Module "A" Missing Message

   HINT: 

   • P0A93-00 may be output as a result of the malfunction indicated by the DTCs above.
     1. The chart above is listed in inspection order of priority.
     2. Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)
5. Turn the power switch off.

Result: 

B 

GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2018 - 08/2019]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2019 - 06/2021]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [06/2021 - ] 

Result: 

C 

GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2018 - ] 

Result: 

D 

GO TO DTC CHART (SFI SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2018 - 08/2019]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2019 - 07/2020]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [07/2020 - ] 

Result: 

A 

See step  2

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the service information because this may cause a malfunction.

2. Check the connection condition of the low voltage connectors of the inverter with converter assembly and the contact pressure of each terminal. Check the terminals for deformation, and the connector for water and foreign matter.

   HINT: 

   Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [11/2015 - ]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NOTE:

   Before disconnecting the connector, confirm that it is properly connected by checking that the claws of the lock levers are engaged and that the connector cannot be pulled off.

   OK

   - The connector is connected securely.

   - The terminals are not deformed and are connected securely.

   - No water or foreign matter in the connector.

   HINT: 

   When connecting the connector, connect it with the lock levers raised. Rotate each lock lever downward and make sure that the connector is securely connected. When a lock lever is fully lowered, a click will be heard as its claw engages. After the click is heard, pull up on the connector to confirm that it is securely connected.

   Result

   Result	Proceed to
   OK	A
   NG (The connector is not connected securely.)	B
   NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.)	C

Result: 

B 

CONNECT SECURELY 

Result: 

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

A 

See step  3

Refer to Cooling System [12/2018 - ]

HINT: 

If the "Cooling System" inspection results are normal, perform the next step.

Result

Result: 

NEXT 

REPLACE HV COOLANT. Refer to  REPLACEMENT [11/2015 - ]