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

ECM Check Sum error: 

TYPICAL MALFUNCTION THRESHOLDS

Check sum Error

Electronic throttle control system power supply function of ECM malfunctions (P0657): 

DIAGNOSTIC PROCEDURE

ETCS (Electronic Throttle Control System) power supply when ignition switch turned to ON. 7 V or more
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