DTC U117F-87: Lost Communication with Drive Motor Control Module "A" (ch5) Missing Message [09/2023 - ]: Procedure

Pre-procedure1

• Disconnect the cable from the negative (-) auxiliary battery terminal.
• Disconnect the TCM connector.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  C25-31 (CANI) - C25-32 (CANO)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	Ω
  C25-31 (CANI) or C25-32 (CANO) - Other power supply terminals	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	kΩ
  C25-31 (CANI) or C25-32 (CANO) - Body ground and other terminals	Cable disconnected from negative (-) auxiliary battery terminal	200 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

NG 

See step  6

Result: 

OK 

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.
• Remove the IGCT NO. 1 relay from the No. 1 engine room relay block assembly.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  C46-10 (IGC1) - 5 (IGCT NO. 1 relay holder)	Ignition switch off	Below 1 Ω	Ω
  C46-11 (IGC2) - 5 (IGCT NO. 1 relay holder)	Ignition switch off	Below 1 Ω	Ω
  C46-30 (GND1) - Body ground	Ignition switch off	Below 1 Ω	Ω
  C46-31 (GND2) - Body ground	Ignition switch off	Below 1 Ω	Ω

  Result

  Proceed to
  OK
  NG

Post-procedure1

• Install the IGCT NO. 1 relay.
• Reconnect the hybrid motor control inverter assembly connector.

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

HINT: 

Refer to REMOVAL [09/2023 - ]

Result

Result: 

NEXT 

See step  4

Pre-procedure1

• None.

• Clear the DTCs.

  Powertrain > Transmission > Clear DTCs 

  Result

  Proceed to
  NEXT

Post-procedure1

• Turn the ignition switch off and wait for at least 30 seconds.

Result: 

NEXT 

See step  5

Pre-procedure1

• Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

• Read the DTCs.

  Powertrain > Transmission > Trouble Codes 

  Result

  Result	Proceed to
  U117F-87 is output	A
  U117F-87 is not output	B

Post-procedure1

• None.

Result: 

A 

REPLACE TCM. Refer to  REMOVAL [09/2023 - ] 

Result: 

B 

END 

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.
• Disconnect the TCM connector.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  C46-36 (CALH) - C25-31 (CANI)	Always	Below 1 Ω	Ω
  C46-37 (CALL) - C25-32 (CANO)	Always	Below 1 Ω	Ω
  C46-36 (CALH) or C25-31 (CANI) - Body ground and other terminals	Always	10 kΩ or higher	kΩ
  C46-37 (CALL) or C25-32 (CANO) - Body ground and other terminals	Always	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

OK 

REPLACE HYBRID MOTOR CONTROL INVERTER ASSEMBLY. Refer to  REMOVAL [09/2023 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR