P0770

SYSTEM DESCRIPTION

The ECM uses the signals from the NCO revolution sensor and crankshaft position sensor 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 or automatic transmission (clutch, brake or gear etc.)




DETECTING CONDITIONS

Step 1:

Step 2:

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.