DTC P0979 Shift Solenoid "C" Control Circuit Low (Shift Solenoid Valve S3); DTC P0980 Shift Solenoid "C" Control Circuit High (Shift Solenoid Valve S3): Wiring Diagram
WARNING: This page is about a different car, the 2006 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
- The shift solenoid valve S3 is turned on/off normally when the shift lever is in the D position:SHIFT LEVER POSITION
ECM command gearshift 1st 2nd 3rd 4th 5th 6th Shift solenoid valve S3 ON ON ON OFF OFF OFF
- INSPECT TRANSMISSION WIRE (S3)
- Disconnect the transmission wire connector from the transmission.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITIONTester Connection Specified Condition 20°C (68°F) 7 - Body ground 11 to 15 Ω
NG : Go to step 3
OK : GO TO NEXT STEP
- CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)
- Connect the transmission connector to the transmission.
- Disconnect the connector from the ECM.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITIONTester Connection Specified Condition 20°C (68°F) E4-17 (S3) - Body ground 11 to 15 Ω
NG : REPAIR OR REPLACE HARNESS OR CONNECTOR
OK : REPLACE ECM
- INSPECT SHIFT SOLENOID VALVE S3
- Remove the shift solenoid valve S3.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITIONTester Connection Specified Condition 20°C (68°F) Solenoid Connector (S3) - Solenoid Body (S3) 11 to 15 Ω - Connect the positive (+) lead to the terminal of the solenoid connector, and the negative (-) lead to the solenoid body.
OK: The solenoid makes an operating sound.
NG : REPLACE SHIFT SOLENOID VALVE S3
OK : REPAIR OR REPLACE TRANSMISSION WIRE