DTC P0985: Shift Solenoid "E" Control Circuit Low (Shift Solenoid Valve SR); DTC P0986: Shift Solenoid "E" Control Circuit High (Shift Solenoid Valve SR) [11/2021 - ]: Procedure
WARNING: This page is about a different car, the 2024 Lexus IS 500, 2023 Lexus IS 500, and 2022 Lexus IS 500. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE (SHIFT SOLENOID VALVE SR) - TCM)
- Disconnect the F156 TCM connector.
*a Rear view of wire harness connector
(to TCM) - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition F156-15 (SR) - Body ground 20°C (68°F) 11 to 15 Ω Result
Proceed to OK NG
Result:
NG
See step 3
Result:
OK
See step 2
- Disconnect the F156 TCM connector.
- REPLACE TCM
- Replace the TCM.
Refer to COMPONENTS [11/2021 - ]
Result
Proceed to NEXT
Result:
NEXT
PERFORM A/T CODE REGISTRATION. Refer to REGISTRATION [11/2021 - ]
- Replace the TCM.
- CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)
- Disconnect the F175 transmission wire connector.
- Disconnect the F156 TCM connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition F175-18 (SR) - F156-15 (SR) Always Below 1 Ω F175-18 (SR) or F156-15 (SR) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - TCM)
Result:
OK
See step 4
- INSPECT SHIFT SOLENOID VALVE SR
- Remove the shift solenoid valve SR.
*a Shift Solenoid Valve SR Refer to DISASSEMBLY [11/2021 - ]
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition Terminal of shift solenoid valve SR connector - Shift solenoid valve SR body 20°C (68°F) 11 to 15 Ω - Connect a positive (+) lead from the battery to the terminal of the solenoid valve connector, and a negative (-) lead to the solenoid body. Check that the valve moves and makes an operating sound.
OK
Valve moves and makes an operating sound.
Result
Proceed to OK NG
Result:
OK
REPAIR OR REPLACE TRANSMISSION WIRE. Refer to COMPONENTS [11/2021 - ]
Result:
NG
REPLACE SHIFT SOLENOID VALVE SR. Refer to COMPONENTS [11/2021 - ]
- Remove the shift solenoid valve SR.