DTC P0A1D-94: Hybrid/EV Powertrain Control Module Unexpected Operation [06/2020 - ]: Procedure

1. Check the connections of the hybrid vehicle control ECU assembly connector.

   Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [11/2018 - ]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK

   The connector is connected securely and there are no contact problems.

   Result

   Result
   OK
   NG

Result: 

NG 

CONNECT SECURELY 

Result: 

OK 

See step  2

1. 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 appropriate service information because this may cause a malfunction.

2. Remove the No. 1 HV battery hose.

   Refer to PROCEDURE - Step 23 , or refer to PROCEDURE - Step 23 [08/2020 - 12/2021] , or refer to PROCEDURE - Step 23 [12/2021 - 10/2022] , or refer to PROCEDURE - Step 23 [10/2022 - 10/2023] , or refer to PROCEDURE - Step 23 [10/2023 - ]

3. Check the connections of the z26 battery ECU assembly connector.

   Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [11/2018 - ]

   OK

   The connector is connected securely and there are no contact problems.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

4. Install the upper hybrid battery cover sub-assembly.

   Result

   Result
   OK
   NG

Result: 

NG 

CONNECT SECURELY 

Result: 

OK 

See step  3

1. 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 appropriate service information because this may cause a malfunction.

2. Remove the No. 4 HV battery protector.

   Refer to PROCEDURE - Step 15 [06/2020 - 08/2020] , or refer to PROCEDURE - Step 15 [08/2020 - 12/2021] , or refer to PROCEDURE - Step 15 [12/2021 - 10/2022] , or refer to PROCEDURE - Step 15 [10/2022 - 10/2023] , or refer to PROCEDURE - Step 15 [10/2023 - ]

3. Check the connections of the Nz1 HV battery connector.

   Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [11/2018 - ]

   OK

   The connector is connected securely and there are no contact problems.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

4. Install the No. 4 HV battery protector.

   Result

   Result
   OK
   NG

Result: 

NG 

CONNECT SECURELY 

Result: 

OK 

See step  4

Refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

Result

Result: 

NEXT 

COMPLETED