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Home >> Toyota >> 2007 >> Matrix XR, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control System (1ZZ-FE) >> SFI System >> DTC P0601 Internal Control Module Memory Check Sum Error >> Inspection Procedure

Inspection Procedure

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Read freeze frame data using an intelligent tester or OBD II scan tool. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

  1. REPLACE ECM 
    1. Replace the ECM (See REMOVAL  ).

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