Shut Down Signal Circuit [11/2018 - 08/2020]: 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 Assembly)

   -

   -

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A29-6 (HSDN) - A30-3 (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 appropriate service information because this may cause a malfunction.

2. Disconnect the A51 inverter with converter assembly connector.
3. Disconnect the A29 hybrid vehicle control ECU assembly 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 Assembly)

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A51-22 (HSDN) or A29-6 (HSDN) - Body ground	Power switch on (IG)	Below 1 V

   NOTE:

   Turning the power switch on (IG) with the hybrid vehicle control ECU assembly 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.
9. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A51-22 (HSDN) - A51-6 (+B)	Power switch off	10 kΩ or higher
   A51-22 (HSDN) - A51-5 (+B2)	Power switch off	10 kΩ or higher
   A29-6 (HSDN) - A29-11 (+B1)	Power switch off	10 kΩ or higher
   A29-6 (HSDN) - A29-5 (MREL)	Power switch off	10 kΩ or higher

10. Reconnect the A29 hybrid vehicle control ECU assembly connector.
11. Reconnect the A51 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 appropriate service information because this may cause a malfunction.

2. Disconnect the A51 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
   22 (HSDN) - 6 (+B)	Power switch off	10 kΩ or higher
   22 (HSDN) - 5 (+B2)	Power switch off	10 kΩ or higher

4. Reconnect the A51 inverter with converter assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 

Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020]

Result: 

NG 

REPLACE INVERTER WITH CONVERTER ASSEMBLY 

Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020]