lemon-mirror:
Home >> Lexus >> 2008 >> SC 430 >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> SFI System >> DTC P0606: ECM / PCM Processor >> Inspection Procedure

Inspection Procedure

  1. CHECK FOR EXHAUST GAS LEAK 
    1. Allow the engine to idle.
    2. Check for an exhaust gas leak around the HO2S.

    OK: 

    No leak from the HO2S. 

    NG: REPAIR LEAK 

    OK: Go to next step 

  2. CHECK HEATED OXYGEN SENSOR 
    Fig 1: Fuel-Trim And Rear HO2S Voltage Pattern
    G04967990Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Warm up the engine.
    2. Allow the engine to idle.
    3. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.
    4. Check the O2S B1 S2 (O2S B2 S2) values when the Control the Injection Volume for A/F Sensor is -12.5% (Lean fuel-trim).
    5. Check the O2S B1 S2 (O2S B2 S2) values when the Control the Injection Volume for A/F Sensor is 25% (Rich fuel-trim).

    Standard 

    PROBLEM SYMPTOM CHART

    Control the Injection Volume for A/F Sensor O2S B1 S2 (O2S B2 S2)
    -12.5% Less than 0.2 V
    25% More than 0.8 V

    NG: REPLACE HEATED OXYGEN SENSOR 

    OK: Go to next step 

  3. CHECK DTC 
    1. Clear DTC.
    2. Turn the ignition switch OFF.
    3. Disconnect the cable from the negative battery terminal and wait for 1 minute.
    4. Connect the cable to the negative battery terminal.
    5. Start the engine.
      Fig 2: Engine Coolant Temperature Drive Pattern
      G04967991Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Perform the drive pattern.
      1. Warm up the engine.
      2. Accelerate the vehicle until 80 km/h (50 mph) and stop the vehicle.
      3. Drive the vehicle by 60 to 80 km/h (35 to 50 mph) for 5 minutes or more.
    7. Check DTC.

    OK: 

    P0606 is not present. 

    NG: REPLACE ECM 

    OK: CHECK FOR INTERMITTENT PROBLEMS 

· About lemon-mirror