DTC P321E-9F: Motor/Generator Shutdown Signal Stuck Off [11/2015 - 12/2018]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
4. 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.)
5. Turn the power switch off.

Result: 

B 

GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2015 - 11/2017]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2017 - 12/2018] 

Result: 

A 

See step  2

1. Check the connector connections and contact pressure of the relevant terminals for the hybrid vehicle control ECU connectors.

   HINT: 

   Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [11/2015 - ]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK

   The connectors are connected securely and there are no contact pressure problems.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

CONNECT SECURELY 

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 service information because this may cause a malfunction.

2. Check the connection condition of the low voltage connectors of the inverter with converter assembly and the contact pressure of each terminal. Check the terminals for deformation, and the connector for water and foreign matter.

   HINT: 

   Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [11/2015 - ]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NOTE:

   Before disconnecting the connector, confirm that it is properly connected by checking that the claws of the lock levers are engaged and that the connector cannot be pulled off.

   OK

   - The connector is connected securely.

   - The terminals are not deformed and are connected securely.

   - No water or foreign matter in the connector.

   HINT: 

   When connecting the connector, connect it with the lock levers raised. Rotate each lock lever downward and make sure that the connector is securely connected. When a lock lever is fully lowered, a click will be heard as its claw engages. After the click is heard, pull up on the connector to confirm that it is securely connected.

   Result

   Result	Proceed to
   OK	A
   NG (The connector is not connected securely.)	B
   NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.)	C

Result: 

B 

CONNECT SECURELY 

Result: 

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

A 

See step  4

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 service information because this may cause a malfunction.

2. Disconnect the C33 inverter with converter assembly connector.
3. Disconnect the A50 hybrid vehicle control ECU connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   (C33, A-50)

   (C33)

   (A50)

   Tester Connection	Condition	Specified Condition
   C33-22 (HSDN) - A50-6 (HSDN)	Power switch off	Below 1 Ω
   C33-22 (HSDN) or A50-6 (HSDN) - Body ground and other terminals	Power switch off	10 kΩ or higher

   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)

   HINT: 

   As there might be an intermittent malfunction, inspect the following items even if the measured resistance is as specified.

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

5. Reconnect the A50 hybrid vehicle control ECU connector.
6. Reconnect the C33 inverter with converter assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

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 service information because this may cause a malfunction.

2. Disconnect the C33 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

   (C33)

   (C33)

   Tester Connection	Condition	Specified Condition
   C33-22 (HSDN) - C33-24 (GND1)	Power switch off	2.65 to 3.55 kΩ

   NOTE:

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

4. Reconnect the C33 inverter with converter assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [11/2015 - 12/2018] 

Result: 

NG 

REPLACE INVERTER WITH CONVERTER ASSEMBLY. Refer to  REMOVAL [11/2015 - 12/2018]