DTC P26F4-96: Coolant Pump "C" Control Circuit Component Internal Failure [09/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS AND CONNECTOR (EV MOTOR CONTROL INVERTER ASSEMBLY - REAR OIL PUMP ASSEMBLY)
See step 5

Result

Proceed to

OK

NG

Result:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

OK

See step 2

INSPECT REAR OIL PUMP ASSEMBLY

Pre-procedure1

Disconnect the rear oil pump assembly connector.

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Component without harness connected (Rear Oil Pump Assembly (Rear Transaxle Assembly))

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
J73-3 (ROPM) - Body ground	Ignition switch off	10 kΩ or higher	kΩ

Result

Proceed to
OK
NG

Post-procedure1

Reconnect the rear oil pump assembly connector.

Result:

REPLACE REAR TRANSAXLE WITH MOTOR AND INVERTER ASSEMBLY. Refer to REMOVAL [09/2023 - 12/2023] , or refer to REMOVAL [12/2023 - ]

Result:

REPLACE REAR TRANSAXLE WITH MOTOR ASSEMBLY. Refer to REMOVAL [09/2023 - 12/2023] , or refer to REMOVAL [12/2023 - ]