DTC P321E-9F: Motor/Generator Shutdown Signal Stuck Off [10/2022 - ]: Procedure

Pre-procedure1

1. None.

   Procedure1

2. Check for DTCs.

   Powertrain > Hybrid Control > 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
   	P33BF-9F	Motor/Generator Shutdown Signal (MG 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

3. Turn the ignition switch off.

Result: 

B 

GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2022 - 10/2024]  , or Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2024 - ] 

Result: 

A 

See step  2

Refer to PROCEDURE - Step 1

Result

Result: 

NG 

CONNECT SECURELY 

Result: 

OK 

See step  3

Refer to PROCEDURE - Step 3

Result

Result: 

B 

CONNECT SECURELY 

Result: 

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

A 

See step  4

Pre-procedure1

1. 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 appropriate service information because this may cause a malfunction.

2. Disconnect the hybrid motor control inverter assembly.
3. Disconnect the hybrid vehicle control ECU connector.

   Procedure1

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A41-6 (HSDN) - A21-9 (HSDN)	Ignition switch off	Below 1 Ω
   A41-6 (HSDN) or A21-9 (HSDN) - Body ground and other terminals	Ignition switch off	10 kΩ or higher

   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)

   HINT: 

   Check that each connector between the hybrid motor control inverter assembly and hybrid vehicle control ECU is not loose or disconnected.

   Result

   Proceed to
   OK
   NG

   Post-procedure1

5. Reconnect the hybrid vehicle control ECU connector.
6. Reconnect the hybrid motor control inverter assembly.

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

Pre-procedure1

1. 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 appropriate service information because this may cause a malfunction.

2. Disconnect the hybrid motor control inverter assembly.

   Procedure1

3. 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
   A41-6 (HSDN) - A41-9 (GND1)	Ignition switch off	2.65 to 3.55 kΩ

   NOTE:

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

   Result

   Proceed to
   OK
   NG

   Post-procedure1

4. Reconnect the hybrid motor control inverter assembly.

Result: 

OK 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Result: 

NG 

REPLACE HYBRID MOTOR CONTROL INVERTER ASSEMBLY. Refer to  REMOVAL [10/2022 - ]