Shut Down Signal Circuit [12/2023 - ]: 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 Assembly)

  -

  -

  Standard Voltage

  Tester Connection	Condition	Specified Condition	Result
  B88-9 (HSDN) - D117-1 (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 service information because this may cause a malfunction.

• Disconnect the hybrid motor control inverter assembly connector.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

• Disconnect the hybrid vehicle control ECU assembly connector.
• 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.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a

  Front view of wire harness connector (to Hybrid Motor Control Inverter Assembly)

  *b

  Front view of wire harness connector (to Hybrid Vehicle Control ECU Assembly)

  Standard Voltage

  Tester Connection	Condition	Specified Condition	Result
  B89-6 (HSDN) or B88-9 (HSDN) - Body ground	Ignition switch ON	Below 1 V	V

  NOTE:

  Turning the ignition switch to ON with the hybrid vehicle control ECU assembly and hybrid motor control inverter 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
  B89-6 (HSDN) - B89-36 (+B)	Ignition switch off	10 kΩ or higher	kΩ
  B89-6 (HSDN) - B89-35 (+B2)	Ignition switch off	10 kΩ or higher	kΩ
  B88-9 (HSDN) - D117-8 (+B1)	Ignition switch off	10 kΩ or higher	kΩ
  B88-9 (HSDN) - D117-10 (MREL)	Ignition switch off	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• Reconnect the hybrid vehicle control ECU assembly connector.
• Reconnect the hybrid motor control inverter 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 service information because this may cause a malfunction.

• Disconnect the hybrid motor control inverter assembly connector.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a	Component without harness connected (Hybrid Motor Control Inverter Assembly)

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  B89-6 (HSDN) - B89-36 (+B)	Ignition switch off	10 kΩ or higher	kΩ
  B89-6 (HSDN) - B89-35 (+B2)	Ignition switch off	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• Reconnect the hybrid motor control inverter assembly connector.

Result: 

OK 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

Result: 

NG 

REPLACE HYBRID MOTOR CONTROL INVERTER ASSEMBLY. Refer to  REMOVAL [12/2023 - ]