Shut Down Signal Circuit [12/2022 - ]: Procedure

Pre-procedure1

• Turn the ignition switch to ON.

• 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	Result
  A57-9 (HSDN) - K11-1 (E1)	Ignition switch ON	Below 4.5 V	V

  Result

  Proceed to
  OK
  NG

Post-procedure1

• Turn the ignition switch off.

Result: 

OK 

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

Result: 

NG 

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 repair information because this may cause a malfunction.

• Disconnect the inverter with converter assembly connector.
• Disconnect the hybrid vehicle control ECU connectors.
• Connect the cable to the negative (-) auxiliary battery terminal.
• Turn the ignition switch to ON.

• Measure the voltage according to the value(s) in the table below.

  Standard Voltage

  Tester Connection	Condition	Specified Condition	Result
  A88-26 (HSDN) or A57-9 (HSDN) - Body ground	Ignition switch ON	Below 1 V	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.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  A88-26 (HSDN) - A88-1 (IGC1)	Ignition switch off	10 kΩ or higher	kΩ
  A88-26 (HSDN) - A88-9 (IGC2)	Ignition switch off	10 kΩ or higher	kΩ
  A57-9 (HSDN) - K11-8 (+B1)	Ignition switch off	10 kΩ or higher	kΩ
  A57-9 (HSDN) - K11-10 (MREL)	Ignition switch off	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• Reconnect the hybrid vehicle control ECU connectors.
• Reconnect the inverter with converter assembly connector.

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

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 repair information because this may cause a malfunction.

• Disconnect the inverter with converter assembly connector.

• 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	Result
  A88-26 (HSDN) - A88-1 (IGC1)	Ignition switch off	10 kΩ or higher	kΩ
  A88-26 (HSDN) - A88-9 (IGC2)	Ignition switch off	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• Reconnect the inverter with converter assembly connector.

Result: 

OK 

REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [12/2022 - 03/2023]  , or refer to  REMOVAL [03/2023 - ] 

Result: 

NG 

REPLACE INVERTER WITH CONVERTER ASSEMBLY. Refer to  REMOVAL [12/2022 - ]