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Home >> Toyota >> 2006 >> RAV4 Base, 2.4 D, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control System (2AZ-FE) >> SFI System >> DTC P1550 Battery Current Sensor Circuit; DTC P1551 Battery Current Sensor Circuit Low; DTC P1552 Battery Current Sensor Circuit High >> Description
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DTC P1550 Battery Current Sensor Circuit; DTC P1551 Battery Current Sensor Circuit Low; DTC P1552 Battery Current Sensor Circuit High: Description

Fig 1: Sensor Output Voltage Graph
G04483928Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

The battery current sensor installed on the positive (+) battery terminal detects the amount of current supplied from the generator.

The battery current sensor changes current to voltage (at the positive (+) battery terminal) and sends it to the ECM. The ECM controls the voltage of the generator based on the signals from the battery current sensor.

DTC DETECTION CONDITIONS - TROUBLE AREA

DTC No. DTC Detection Conditions Trouble Areas
P1550 The following condition continues for 10 seconds or more with the ignition switch ON (1 trip detection logic):
  • Difference between the maximum and minimum current values of the battery current sensor is 1 A or less
  • Open or short in battery current sensor circuit
  • Battery current sensor assembly
  • ECM
P1551 Battery current sensor output value is 0.2 V or less for 0.5 seconds or more with the ignition switch ON
(1 trip detection logic):
  • Short in battery current sensor circuit
  • Battery current sensor assembly
  • ECM
P1552 Battery current sensor output value is 4.8 V or more for 0.5 seconds or more with the ignition switch ON
(1 trip detection logic):
  • Open in battery current sensor circuit
  • Battery current sensor assembly
  • ECM