DTC P281B-12: Pressure Control Solenoid "H" Control Circuit Short to Battery [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 (SOLENOID (SL5) VALVE - TCM)
Pre-procedure1
- Disconnect the TCM connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition Result C25-3 (SL5+) - C25-20 (SLG2) 20°C (68°F) 5.0 to 5.6 Ω Ω Result
Proceed to OK NG
Post-procedure1
- None.
Result:
OK
REPLACE TCM. Refer to REMOVAL [09/2023 - ]
Result:
NG
See step 2
- CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)
Pre-procedure1
- Disconnect the transmission wire connector.
- Disconnect the TCM connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition Result C65-30 (SL5+) - C25-3 (SL5+) Always Below 1 Ω Ω C65-30 (SL5+) or C25-3 (SL5+) - Other terminals Always 10 kΩ or higher kΩ Result
Proceed to OK NG
Post-procedure1
- None.
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 3
- INSPECT SOLENOID (SL5) VALVE
Refer to INSPECTION [09/2023 - ]
Result
Proceed to OK NG Result:
OK
REPAIR OR REPLACE TRANSMISSION WIRE. Refer to REMOVAL [09/2023 - ]
Result:
NG
REPLACE TRANSMISSION VALVE BODY ASSEMBLY. Refer to REMOVAL [09/2023 - ]