DTC P2796-12: Electromagnetic Oil Pump Circuit Short to Battery [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 

See step  5

Result: 

A 

See step  2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Result
   C36-9 (EMOP) - Other terminals*	Always	10 kΩ or higher	kΩ

   1. *: Except A24-8 (GND1) terminal

   Result

   Proceed to
   OK
   NG

Result: 

OK 

GO TO BACKUP BOOST CONVERTER CIRCUIT. Refer to  Backup Boost Converter Circuit [10/2022 - ] 

Result: 

NG 

See step  3

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 with harness connected (Engine Stop and Start ECU)

  -

  -

  Standard Resistance

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

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

OK 

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

Result: 

NG 

See step  4

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) or B25-29 (EMP+) - Other terminals	Always	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

OK 

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

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Pre-procedure1

• Turn the ignition switch to ON.

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

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a

  Component with harness connected (Engine Stop and Start ECU)

  -

  -

  Result

  Tester Connection	Condition	Specified Condition	Result
  C36-8 (EGND) - Body ground	Ignition switch ON	Below 1 V	V

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ] 

Result: 

NG 

See step  6

Pre-procedure1

• Disconnect the transmission wire connector.
• Turn the ignition switch to ON.

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

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a

  Component with harness connected (Engine Stop and Start ECU)

  -

  -

  Result

  Tester Connection	Condition	Specified Condition	Result
  C36-8 (EGND) - Body ground	Ignition switch ON	Below 1 V	V

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

OK 

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

Result: 

NG 

See step  7

Pre-procedure1

• Disconnect the engine stop and start ECU connector.
• Turn the ignition switch to ON.

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

  Result

  Tester Connection	Condition	Specified Condition	Result
  C36-8 (EGND) - Body ground	Ignition switch ON	Below 1 V	V

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

OK 

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

Result: 

NG 

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