DTC P178A-14: Gear Shift Control Module "B" Wake-up Circuit Short to Ground or Open; DTC P178D-14: Gear Shift Control Module "B" (Sub CPU) Wake-up Circuit Short to Ground or Open [10/2022 - ]: Procedure

Pre-procedure1

• Disconnect the B58 shift control actuator assembly (shift actuator ECU) connector.
• Turn the ignition switch to ON.
  NOTE:

  Turning the ignition switch to ON with the connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

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

  Standard Voltage

  Tester Connection	Condition	Specified Condition	Result
  B58-5 (WAKE) - Body ground	Ignition switch ON	11 to 14 V	V

  Result

  Proceed to
  OK
  NG

Post-procedure1

• Turn the ignition switch off.
• Connect the shift control actuator assembly (shift actuator ECU) connector.

Result: 

OK 

REPLACE SHIFT CONTROL ACTUATOR ASSEMBLY (SHIFT ACTUATOR ECU). Refer to  REMOVAL [10/2022 - ] 

Result: 

NG 

See step  2

Pre-procedure1

• Disconnect the B58 shift control actuator assembly (shift actuator ECU) connector.
• Disconnect the C35 transmission floor shift assembly (shift control ECU) connector.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  B58-5 (WAKE) - C35-5 (WAKE)	Always	Below 1 Ω	Ω
  B58-5 (WAKE) or C35-5 (WAKE) - Body ground and other terminals	Always	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• Connect the transmission floor shift assembly (shift control ECU) connector.
• Connect the shift control actuator assembly (shift actuator ECU) connector.

Result: 

OK 

REPLACE TRANSMISSION FLOOR SHIFT ASSEMBLY (SHIFT CONTROL ECU). Refer to  REMOVAL [10/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR