Inspection Procedure: Procedure
WARNING: This page is about a different car, the 2010 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT TRANSMISSION WIRE (SLU)
- 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
20°C (68°F)12 (SLU+) - 4 (SLU-) 5.0 to 5.6 Ω - Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for short)
Tester Connection Specified Condition 12 (SLU+) - Body ground 10 kΩ or higher 4 (SLU-) - Body ground ↑
NG → See step 3
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)
- Connect the transmission wire connector to the transmission.
- Disconnect the ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
Tester Connection Specified Condition
20°C (68°F)E4-13 (SLU+) - E4-12 (SLU-) 5.0 to 5.6 Ω - Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for short)
Tester Connection Specified Condition E4-13 (SLU+) - Body ground 10 kΩ or higher E4-12 (SLU-) - Body ground ↑
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → REPLACE ECM
- INSPECT SHIFT SOLENOID VALVE SLU
- Remove the shift solenoid valve SLU.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
Tester Connection Specified Condition
20°C (68°F)1 - 2 5.0 to 5.6 Ω - Connect the positive (+) lead with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector, then check the movement of the valve.
OK
The solenoid makes an operating sound.
NG → REPLACE SHIFT SOLENOID VALVE SLU
OK → REPAIR OR REPLACE TRANSMISSION WIRE