DTC P0A93-00: Inverter "A" Cooling System Performance [09/2023 - ]: Procedure

Pre-procedure1

• None.

• 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	SFI 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

  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.)

Post-procedure1

• Turn the ignition switch off.

Result: 

B 

GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2023 - ] 

Result: 

C 

GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2023 - ] 

Result: 

D 

GO TO DTC CHART (SFI SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2023 - ] 

Result: 

A 

See step  2

Pre-procedure1

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

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

• Check the connection condition of the low voltage connectors of the hybrid motor control inverter 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 [09/2023 - ]

  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.

  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

  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.

Post-procedure1

• None.

Result: 

B 

CONNECT SECURELY 

Result: 

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

A 

See step  3

HINT: 

• Refer to Cooling System [09/2023 - ]
• If the "Cooling System" inspection results are normal, perform the next step.

Result

Result: 

NEXT 

REPLACE HV COOLANT