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Home >> Toyota >> 2009 >> Highlander Limited, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2GR-FE) - DTC P050A - P2A03 >> DTC P0606 ECM/PCM Processor >> Inspection Procedure
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Inspection Procedure

  1. CHECK ANY OTHER DTCS OUTPUT 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to the ON position.
    3. Turn the tester on.
    4. Enter the following menus: Powertrain/Engine and ECT/Trouble Codes.
    5. Read the DTCs.

      Result 

      RESULT CHART

      Result Proceed to
      DTC P0606 is output A
      DTC P0606 and P0136, P0137, P0138, P0156, P0157 or P0158 are output B

      A: Go to step  3

      B: Go to next step 

  2. INSPECT DTC (P0136, P0137, P0138, P0156, P0157 OR P0158) 
    1. Inspect the P0136, P0137, P0138, P0156, P0157 or P0158 flow chart.

      HINT:

      • If P0136 or P0156 is output, troubleshoot for that DTC first (See CONFIRMATION DRIVING PATTERN ). Then proceed to step  6.
      • If P0137 or P0157 is output, troubleshoot for that DTC first (See CONFIRMATION DRIVING PATTERN ). Then proceed to step  6.
      • If P0138 or P0158 is output, troubleshoot for that DTC first (See CONFIRMATION DRIVING PATTERN ). Then proceed to step  6.
      • If DTC P0606 and P0136, P0137, P0138, P0156, P0157 or P0158 are output, the output voltage of the heated oxygen sensor may remain close to 0 V or become high (around 1 V or more).

        NEXT: Go to step  6

  3. CHECK FOR EXHAUST GAS LEAK 
    1. Allow the engine to idle and rev the engine.
    2. Check for exhaust gas leaks around the heated oxygen sensor.

      If any exhaust gas leaks are present, repair them and proceed to step 4. If no exhaust gas leaks are present, proceed to step 4.

      HINT:

      • If no exhaust gas leaks are present, a malfunction in the heated oxygen sensor circuit is suspected.
      • If any exhaust gas leaks are present around the heated oxygen sensor, noise appears in the output voltage of the heated oxygen sensor.
  4. PERFORM CONFIRMATION DRIVING PATTERN 
    1. Clear the DTC (See DTC CHECK/CLEAR ).
    2. Connect the Techstream to the DLC3.
    3. Warm up the engine until the engine coolant temperature becomes 75° (167°F) or more.
    4. Perform the driving pattern.
      Fig 1: Monitor Drive Pattern For P0606
      G06111572Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Accelerate the vehicle to 50 mph (80 km/h) and stop the vehicle.
      2. Drive the vehicle at 38 to 50 mph (60 to 80 km/h) for 5 minutes or more.
    5. Enter the following menus: Powertrain/Engine and ECT/Trouble Codes.
    6. Read the DTCs.

      Result 

      RESULT CHART

      Result Proceed to
      DTC P0606 and P0136, P0137, P0138, P0156, P0157 or P0158 are output A
      DTC P0606 is output B
      DTC is not output C

      B: REPLACE ECM  (See REMOVAL )

      C: Go to step  6

      A: Go to next step 

  5. INSPECT DTC (P0136, P0137, P0138, P0156, P0157 OR P0158) 
    1. Inspect the P0136, P0137, P0138, P0156, P0157 or P0158 flow chart.

      HINT:

      • If P0136 or P0156 is output, troubleshoot for that DTC first (See CONFIRMATION DRIVING PATTERN ). Then proceed to step  6.
      • If P0137 or P0157 is output, troubleshoot for that DTC first (See CONFIRMATION DRIVING PATTERN ). Then proceed to step  6.
      • If P0138 or P0158 is output, troubleshoot for that DTC first (See CONFIRMATION DRIVING PATTERN ) Then proceed to step  6.
      • If DTC P0606 and P0136, P0137, P0138, P0156, P0157 or P0158 are output, the output voltage of the heated oxygen sensor may remain close to 0 V or become high (around 1 V or more).
  6. INSPECT ECM 
    1. Clear the DTC (See DTC CHECK/CLEAR ).
    2. Stop the engine and wait for 30 minutes.
    3. Connect the Techstream to the DLC3.
    4. Start the engine and allow it to idle for 2 minutes.
    5. Turn the tester on.
    6. Enter the following menus: Powertrain/Engine and ECT/Trouble Codes.
    7. Read the DTCs.

      Result 

      RESULT CHART

      Result Proceed to
      DTC P0606 is output A
      DTC is not output B

      A: REPLACE ECM  (See REMOVAL )

      B: END 

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