Inspection Procedure
WARNING: This page is about a different car, the 2008 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
- The shift solenoid valve S4 is turned on/off normally when the shift lever is in the D position:
GEAR SHIFT POSITIONS
| ECM command gearshift | 1st | 2nd | 3rd | 4th | 5th | 6th |
| Shift solenoid valve S4 | OFF | OFF | OFF | OFF | ON | ON |
- INSPECT TRANSMISSION WIRE (S4)
- 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 CONDITION CHARTTester Connection Specified Condition 20°C (68°F) 14 - 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 CONDITION CHARTTester Connection Specified Condition 20°C (68°F) E4-16 (S4) - Body ground 11 to 15Ω
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE ECM
- INSPECT SHIFT SOLENOID VALVE S4
- Remove the shift solenoid valve S4.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Specified Condition 20°C (68°F) Solenoid Connector (S4) - Solenoid Body (S4) 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 S4
OK: REPAIR OR REPLACE TRANSMISSION WIRE