DTC P2797-96: Electromagnetic Oil Pump Component Internal Failure [10/2022 - ]: Procedure

Pre-procedure1

• Enter the following menus: Powertrain / Stop and Start / Utility / Vehicle Control History (RoB).

  Powertrain > Stop and Start > Utility 

  Tester Display
  Vehicle Control History (RoB)

• Check vehicle control history.

  Result

  Result	Proceed to
  Vehicle control history item BBC Boosting Output Overcurrent stored	A
  Vehicle control history item not stored	B

Post-procedure1

• None.

Result: 

B 

REPLACE ENGINE STOP AND START ECU. Refer to  REMOVAL [10/2022 - ] 

Result: 

A 

See step  2

Pre-procedure1

• Disconnect the engine stop and start ECU connector.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  C36-9 (EMOP) - C36-8 (EGND)	20°C (68°F)	5.0 to 5.6 Ω	Ω

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

OK 

REPLACE ENGINE STOP AND START ECU. Refer to  REMOVAL [10/2022 - ] 

Result: 

NG 

See step  3

Pre-procedure1

• Disconnect the engine stop and start ECU connector.
• Disconnect the transmission wire connector.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  C36-9 (EMOP) - C36-8 (EGND)	Always	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

NG 

See step  5

Result: 

OK 

See step  4

Pre-procedure1

• Disconnect the transmission wire connector.

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

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a	Component without harness connected (Transmission Wire)

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  29 (EMP+) - 28 (EMP-)	20°C (68°F)	5.0 to 5.6 Ω	Ω

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

OK 

REPLACE OIL PUMP WITH SOLENOID ASSEMBLY. Refer to  DISASSEMBLY [10/2022 - ] 

Result: 

NG 

REPLACE TRANSMISSION WIRE. Refer to  REMOVAL [10/2022 - ] 

Pre-procedure1

• Remove the engine stop and start solenoid filter.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a	Component without harness connected (Engine Stop and Start Solenoid Filter)

  HINT: 

  Refer to REMOVAL [10/2022 - ]

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  2 (MOP+) - 1 (MOP-)	Always	10 kΩ or higher	kΩ
  7 (MOPI) - 8 (GND)	Always	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

OK 

REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE STOP AND START ECU - TRANSMISSION WIRE) 

Result: 

NG 

REPLACE ENGINE STOP AND START SOLENOID FILTER. Refer to  REMOVAL [10/2022 - ]