Diagnostic Procedure

DIAGNOSTIC PROCEDURE





1. Connect the OBDII scan tool or LEXUS hand-held tester and read value for voltage output of Heated Oxygen Sensor.
- If not OK proceed to step 2.
- If OK check and replace Engine Control Module.
2. Check for open and short in harness and connector between Engine Control Module and Heated Oxygen Sensor.
- If OK replace Heated Oxygen Sensor.
- If not OK repair or replace harness or connector.