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 SLU, valve body, torque converter clutch and automatic transmission assembly (clutch, brake or gear etc.).




DETECTING CONDITIONS

Step 1:

Step 2:

Step 3:

Step 4:

INSPECTION PROCEDURE

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