DTC P19FA-9F: Rear Motor Shutdown Signal Stuck Off [09/2023 - ]: Procedure

Pre-procedure1

• None.

• Check for DTCs.

  Powertrain > Hybrid Control > Trouble Codes 

  Result

  Result	Proceed to
  P19FA-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	P19FB-9F	Rear Motor Shutdown Signal (Hybrid/EV Side) Stuck Off
  	P19FC-9F	Rear Motor Shutdown Signal (Rear MG Side) Stuck Off

  HINT: 

  • P19FA-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 [09/2023 - ] 

Result: 

A 

See step  2

Refer to PROCEDURE - Step 1

Result

Result: 

NG 

CONNECT SECURELY 

Result: 

OK 

See step  3

1. Check the connection condition of the EV motor control inverter assembly connector and the contact pressure of each terminal. Check the terminals for deformation, and check the connector for water ingress and foreign matter.

   HINT: 

   Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [09/2023 - ]

   OK

   - The connector is connected securely.

   - The terminals are not deformed and are connected securely.

   - No water or foreign matter in the connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   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

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 EV motor control inverter assembly connector.
• Disconnect the hybrid vehicle control ECU assembly connector.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  D44-2 (HSD2) - J72-36 (SDNR)	Ignition switch off	Below 1 Ω	Ω
  D44-2 (HSD2) or J72-36 (SDNR) - Body ground and other terminals	Ignition switch off	10 kΩ or higher	kΩ

  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 EV motor control inverter assembly and hybrid vehicle control ECU assembly is not loose or disconnected.

  Result

  Proceed to
  OK
  NG

Post-procedure1

• Reconnect the hybrid vehicle control ECU assembly connector.
• Reconnect the EV motor control inverter assembly connector.

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

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 EV motor control inverter 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 (EV Motor Control Inverter Assembly)

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  J72-36 (SDNR) - J72-30 (GNR1)	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 EV motor control inverter assembly connector.

Result: 

OK 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [09/2023 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

Result: 

NG 

REPLACE EV MOTOR CONTROL INVERTER ASSEMBLY. Refer to  REMOVAL [09/2023 - 12/2023]  , or refer to  REMOVAL [12/2023 - ]