DTC P281B-49: Pressure Control Solenoid "H" Control Internal Electronic 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 OTHER DTCS OUTPUT (IN ADDITION TO DTC P281B-49)

Read the DTCs using the GTS.

Powertrain > Transmission > Trouble Codes

Result

Result	Proceed to
Only P281B-49 is output	A
P281B-49 and other DTCs are output	B

HINT:

If any DTCs other than DTC P281B-49 are output, perform troubleshooting for those DTCs first.

Result:

GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2023 - ]

Result:

See step 2

INSPECT TRANSMISSION WIRE (SOLENOID (SL5) VALVE)

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
C65-30 (SL5+) - C65-9 (SLG2)	20°C (68°F)	5.0 to 5.6 Ω	Ω

Result

Proceed to
OK
NG

Post-procedure1

None.

Result:

REPLACE TCM. Refer to REMOVAL [09/2023 - ]

Result:

REPLACE TRANSMISSION VALVE BODY ASSEMBLY. Refer to REMOVAL [09/2023 - ]