DTC P2797-96: Electromagnetic Oil Pump Component Internal Failure [03/2023 - ]: Procedure

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

   Powertrain > Stop and Start > Utility 

   Tester Display
   Vehicle Control History (RoB)

2. 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

Result: 

B 

REPLACE ENGINE STOP AND START ECU. Refer to  REMOVAL [11/2021 - ] 

Result: 

A 

See step  2

1. Disconnect the engine stop and start ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D40-9 (EMOP) - D40-8 (EGND)	20°C (68°F)	5.0 to 5.6 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ENGINE STOP AND START ECU. Refer to  REMOVAL [11/2021 - ] 

Result: 

NG 

See step  3

1. Disconnect the engine stop and start ECU connector.
2. Disconnect the transmission wire connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D40-9 (EMOP) - D40-8 (EGND)	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  5

Result: 

OK 

See step  4

1. Inspect the oil pump with solenoid assembly.

   for A25A-FKS: Refer to PROCEDURE - Step 5

   for T24A-FTS: Refer to PROCEDURE - Step 5

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE TRANSMISSION WIRE 

for A25A-FKS: Refer to REMOVAL [11/2021 - ]

for T24A-FTS: Refer to REMOVAL [11/2021 - ]

Result: 

NG 

REPLACE OIL PUMP WITH SOLENOID ASSEMBLY 

for A25A-FKS: Refer to DISASSEMBLY [11/2021 - ]

for T24A-FTS: Refer to DISASSEMBLY [11/2021 - ]

1. 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)

   Refer to REMOVAL [11/2021 - ]

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

   Standard Resistance

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

   Result

   Proceed to
   OK
   NG

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 [11/2021 - ]