P0770

SYSTEM DESCRIPTION
The ECM uses the signals from the throttle position sensor and Air-flow meter to monitor the engagement condition of the lock-up clutch.
Then the ECM compares the engagement condition of the lock-up clutch with the lock-up schedule in the ECM memory to detect mechanical trouble of the shift solenoid valve SLV, valve body and torque converter clutch and automatic transmission assembly.




DETECTING CONDITIONS

Step 1:

Step 2:

Step 3:

Step 4:

INSPECTION PROCEDURE

HINT:
In case of using LEXUS hand-held tester, start the inspection from step 1 and in case of not using the LEXUS hand-held tester, start from step 2.