DTC P0778: Pressure Control Solenoid "B" Electrical (Shift Solenoid Valve SL2) [09/2014 - 11/2017]: Procedure
WARNING: This page is about a different car, the 2017 Lexus RC 350, 2017 Lexus RC 300, 2016 Lexus RC 350, 2016 Lexus RC 300, and 2015 Lexus RC 350. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL2)
- Disconnect the F47 transmission wire connector.
*a Component without harness connected
(Transmission Wire) - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition 10 (SL2+) - 2 (SL2-) 20°C (68°F) 5.0 to 5.6 Ω 10 (SL2+) - Body ground Always 10 kΩ or higher 2 (SL2-) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
NG
See step 3
Result:
OK
See step 2
- Disconnect the F47 transmission wire connector.
- CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)
- Connect the F47 transmission wire connector.
- Disconnect the F1 ECM connector.
*a Rear view of wire harness connector
(to ECM) - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition F1-14 (SL2+) - F1-13 (SL2-) 20°C (68°F) 5.0 to 5.6 Ω F1-14 (SL2+) - Body ground Always 10 kΩ or higher F1-13 (SL2-) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
OK
REPLACE ECM. Refer to COMPONENTS [09/2014 - 10/2015] , or refer to COMPONENTS [10/2015 - 11/2017]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
- INSPECT SHIFT SOLENOID VALVE SL2
- Remove the shift solenoid valve SL2.
*a Shift Solenoid Valve SL2 - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 5.0 to 5.6 Ω - Connect a positive (+) lead from the battery with a 21 W bulb to terminal 1 and a negative (-) lead to terminal 2 of the solenoid valve connector, then check the movement of the valve.
OK
The solenoid makes an operating sound.
Result
Proceed to OK NG
Result:
OK
REPAIR OR REPLACE TRANSMISSION WIRE. Refer to COMPONENTS [09/2014 - ]
Result:
NG
REPLACE SHIFT SOLENOID VALVE SL2. Refer to COMPONENTS [09/2014 - ]
- Remove the shift solenoid valve SL2.