DTC P321E-9F: Motor/Generator Shutdown Signal Stuck Off [11/2020 - 12/2022]: Procedure

Pre-procedure1

• None.

• Check for DTCs.

  Powertrain > EV > Trouble Codes 

  Result

  Result	Proceed to
  P321E-9F only is output, or DTCs except the ones in the table below are also output.	A
  Any of the following DTCs are also output.	B

  Malfunction Content	Relevant DTC
  Sensor and actuator circuit malfunction	P33B9-9F	Motor/Generator Shutdown Signal (Hybrid/EV Side) Stuck Off

  HINT: 

  • P321E-9F may be output as a result of the malfunction indicated by the DTCs above.
    1. The chart above is listed in inspection order of priority.
    2. Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)

Post-procedure1

• Turn the ignition switch off.

Result: 

B 

GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer To  DIAGNOSTIC TROUBLE CODE CHART [11/2020 - 12/2022] 

Result: 

A 

See step  2

Refer to PROCEDURE - Step 1

Result

Result: 

NG 

CONNECT SECURELY 

Result: 

OK 

See step  3

Refer to PROCEDURE - Step 2

Result

Result: 

B 

CONNECT SECURELY 

Result: 

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

A 

See step  4

Pre-procedure1

• Check that the service plug grip and FC converter power outlet cable are not installed.
  NOTE:

  After removing the service plug grip and FC converter power outlet cable, do not turn the ignition switch to ON (READY), unless instructed by the repair Service Information because this may cause a malfunction.

• Disconnect the A19 inverter with converter assembly connector.

  HINT: 

  Refer to REMOVAL [11/2020 - 11/2021] , or refer to REMOVAL [11/2021 - 12/2022]

• Disconnect the A17 EV control ECU connector.

• Measure the resistance 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

  Rear view of wire harness connector (to EV Control ECU)

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  A17-8(HSDN) - A19-25(HSDN)	Ignition switch off	Below 1 Ω	Ω
  A17-8 (HSDN) or A19-25 (HSDN) - Body ground and other terminals	Ignition switch off	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• Reconnect the A17 EV control ECU connector.
• Reconnect the A19 inverter with converter assembly connector.

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

Pre-procedure1

• Check that the service plug grip and FC converter power outlet cable are not installed.
  NOTE:

  After removing the service plug grip and FC converter power outlet cable, do not turn the ignition switch to ON (READY), unless instructed by the repair Service Information because this may cause a malfunction.

• Disconnect the A19 inverter with converter assembly connector.

  HINT: 

  Refer to REMOVAL [11/2020 - 11/2021] , or refer to REMOVAL [11/2021 - 12/2022]

• 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
  A19-25 (HSDN) - A19-30 (GND1)	Ignition switch off	2.65 to 3.55 kΩ	kΩ

  NOTE:

  Be sure not to damage or deform the terminal being inspected.

  Result

  Proceed to
  OK
  NG

Post-procedure1

• Reconnect the A19 inverter with converter assembly connector.

Result: 

OK 

REPLACE EV CONTROL ECU. Refer to  REMOVAL [11/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 12/2022] 

Result: 

NG 

REPLACE INVERTER WITH CONVERTER ASSEMBLY. Refer to  REMOVAL [11/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 12/2022]