Shut Down Signal Circuit [01/2019 - 09/2022]: Procedure

1. Turn the power switch on (IG).
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
   A57-6 (HSDN) - I3-3 (E1)	Power switch on (IG)	Below 4.5 V

3. Turn the power 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 power switch on (READY), unless instructed by the repair information because this may cause a malfunction.

2. Disconnect the C89 inverter with converter assembly connector.
3. Disconnect the A57 hybrid vehicle control ECU connector.
4. Connect the cable to the negative (-) auxiliary battery terminal.
5. Turn the power switch on (IG).
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
   C89-22 (HSDN) or A57-6 (HSDN) - Body ground	Power switch on (IG)	Below 1 V

   NOTE:

   Turning the power switch on (IG) 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 power switch off.
8. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for 2 minutes or more.
9. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C89-22 (HSDN) - C89-6 (+B)	Power switch off	10 kΩ or higher
   C89-22 (HSDN) - C89-5 (+B2)	Power switch off	10 kΩ or higher
   A57-6 (HSDN) - A57-11 (+B1)	Power switch off	10 kΩ or higher
   A57-6 (HSDN) - A57-5 (MREL)	Power switch off	10 kΩ or higher

10. Reconnect the A57 hybrid vehicle control ECU connector.
11. Reconnect the C89 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 power switch on (READY), unless instructed by the repair information because this may cause a malfunction.

2. Disconnect the C89 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
   C89-22 (HSDN) - C89-6 (+B)	Power switch off	10 kΩ or higher
   C89-22 (HSDN) - C89-5 (+B2)	Power switch off	10 kΩ or higher

4. Reconnect the C89 inverter with converter assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [01/2019 - 04/2020]  , or refer to  REMOVAL [04/2020 - 09/2022] 

Result: 

NG 

REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS. Refer to  DTC CHECK / CLEAR [01/2019 - 09/2022]