Typical Malfunction Thresholds
ECM Check Sum error:
ECM CHECK SUM ERROR
| Check sum | Error |
Electronic throttle control system power supply function of ECM malfunctions (P0657):
ELECTRONIC THROTTLE CONTROL SYSTEM POWER SUPPLY FUNCTION OF ECM MALFUNCTIONS P0657
| ETCS (Electronic Throttle Control System) power supply when ignition switch turned to ON. | 7 V or more |