Shut Down Signal Circuit [12/2019 - 11/2023]: Procedure

1. Turn the ignition switch to ON.
2. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component with harness connected (Hybrid Vehicle Control ECU)

   -

   -

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A31-6 (HSDN) - H67-3 (E1)	Ignition switch ON	Below 4.5 V

3. Turn the ignition switch off.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

SHUTDOWN SIGNAL CIRCUIT NORMAL (PERFORM NEXT STEP FOR REFERENCED DTC) 

Result: 

NG 

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 repair information because this may cause a malfunction.

2. Disconnect the A55 inverter with converter assembly connector.
3. Disconnect the A31 hybrid vehicle control ECU connector.
4. Connect the cable to the negative (-) auxiliary battery terminal.
5. Turn the ignition switch to ON.
6. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Inverter with Converter Assembly)
   *b	Front view of wire harness connector (to Hybrid Vehicle Control ECU)

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A55-6 (HSDN) or A31-6 (HSDN) - Body ground	Ignition switch ON	Below 1 V

   NOTE:

   Turning the ignition switch to ON with the hybrid vehicle control ECU and inverter with converter assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

7. Turn the ignition switch off.
8. Disconnect the cable from the negative (-) auxiliary battery terminal.
9. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A55-6 (HSDN) - A55-36 (+B)	Ignition switch off	10 kΩ or higher
   A55-6 (HSDN) - A55-35 (+B2)	Ignition switch off	10 kΩ or higher
   A31-6 (HSDN) - A31-11 (+B1)	Ignition switch off	10 kΩ or higher
   A31-6 (HSDN) - A31-5 (MREL)	Ignition switch off	10 kΩ or higher

10. Reconnect the A31 hybrid vehicle control ECU connector.
11. Reconnect the A55 inverter with converter assembly connector.

    Result

    Proceed to
    OK
    NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

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 repair information because this may cause a malfunction.

2. Disconnect the A55 inverter with converter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Inverter with Converter Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A55-6 (HSDN) - A55-36 (+B)	Ignition switch off	10 kΩ or higher
   A55-6 (HSDN) - A55-35 (+B2)	Ignition switch off	10 kΩ or higher

4. Reconnect the A55 inverter with converter assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023] 

Result: 

NG 

REPLACE INVERTER WITH CONVERTER ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023]