DTC P26F4-96: Coolant Pump "C" Control Circuit Component Internal Failure [12/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS AND CONNECTOR (EV MOTOR CONTROL INVERTER ASSEMBLY - 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 OIL PUMP ASSEMBLY

Pre-procedure1

Disconnect the 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 (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 oil pump assembly connector.

Result:

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

Result:

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