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Home >> Toyota >> 2009 >> RAV4 Base, 3.5 K, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2GR-FE) - Component And System Testing, Removal, Inspection & Installation >> MIL Circuit >> Inspection Procedure
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Inspection Procedure

  1. CHECK THAT MIL IS ILLUMINATED 
    1. Perform troubleshooting in accordance with the table below.

      Result 

      RESULT CHART

      Condition Proceed to
      MIL remains ON A
      MIL does not illuminate B

      B: Go to step  5

      A: Go to next step 

  2. CHECK WHETHER MIL TURNS OFF 
    1. Connect Techstream to the DLC3.
    2. Turn the ignition switch to ON and turn the tester ON.
    3. Select the following menu items: Powertrain / Engine and ECT / Trouble Code.
    4. Check if any DTCs have been stored. Note down any DTCs.
    5. Clear DTCs (See DTC CHECK / CLEAR ).
    6. Check if the MIL goes off.

      OK: MIL should go off. 

      OK: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

      NG: Go to next step 

  3. CHECK WIRE HARNESS (CHECK FOR SHORT IN WIRE HARNESS) 
    1. Disconnect the A9 ECM connector.
    2. Turn the ignition switch to ON.
    3. Check that the MIL is not illuminated.

      OK: MIL is not illuminated. 

    4. Reconnect the ECM connector.

      OK: REPLACE ECM  (See REMOVAL  )

      Fig 1: Identifying A9 ECM Connector
      G05184247Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: Go to next step 

  4. CHECK WIRE HARNESS (COMBINATION METER - ECM) 
    1. Disconnect the A9 ECM connector.
    2. Disconnect the E19 combination meter connector.
    3. Measure the resistance.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      A9-24 (W) or E19-8 (EFI) - Body ground 10 kΩ or higher
    4. Reconnect the ECM connector.
    5. Reconnect the combination meter connector.

      OK: REPAIR OR REPLACE COMBINATION METER ASSEMBLY 

      Fig 2: Identifying A9 ECM Connector And E19 Combination Meter Connector
      G05184248Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

  5. CHECK THAT MIL IS ILLUMINATED 
    1. Check if the MIL is illuminated when the ignition switch is turned to ON.

      OK: MIL is illuminated. 

      OK: SYSTEM OK 

      NG: Go to next step 

  6. CHECK THAT ENGINE STARTS 
    1. Turn the ignition switch to ON.
    2. Check that the engine starts.

      Result 

      RESULT CHART

      Result Proceed to
      Engine starts A
      Engine does not start* B
      HINT:
      *: Techstream cannot communicate with the ECM.

      B:  GO TO VC OUTPUT CIRCUIT 

      A: Go to next step 

  7. INSPECT COMBINATION METER ASSEMBLY (MIL CIRCUIT) 
    1. Check the MIL circuit (See CUSTOMIZE PARAMETERS ).

      NG: REPAIR OR REPLACE COMBINATION METER ASSEMBLY 

      OK: CHECK AND REPLACE HARNESS AND CONNECTOR (COMBINATION METER - ECM) 

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