P1551 SCION - Battery Current Sensor Circuit Low Input
- Faulty Battery Current Sensor
- Battery Current Sensor harness is open or shorted
- Battery Current Sensor circuit poor electrical connection
- Engine Light ON (or Service Engine Soon Warning Light)
P1551 Scion DescriptionThe power generation voltage variable control enables fuel consumption to be decreased by reducing the engine load which is caused by the power generation of the generator. The battery current sensor is installed to the battery cable at the negative terminal. The sensor measures the charging/discharging current of the battery. Based on the sensor signal, Engine Control Module (ECM) judges whether or not the power generation voltage variable control is performed. When performing the power generation voltage variable control, ECM calculates the target power generation voltage based on the sensor signal.
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