Dtc P1550 Battery Current Sensor Circuit

Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
2Gr-Fe Engine Control System. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT BATTERY CURRENT SENSOR ASSEMBLY

CHECK HARNESS AND CONNECTOR (BATTERY CURRENT SENSOR - ECM)

DTC P1550 Battery Current Sensor Circuit

DTC P1551 Battery Current Sensor Circuit Low

DTC P1552 Battery Current Sensor Circuit High


DESCRIPTION

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.2Gr-Fe Engine Control System.Sfi System. Dtc P1550 Battery Current Sensor Circuit
The battery current sensor installed on the negative (-) battery terminal detects the amount of current supplied from the generator.
The battery current sensor changes current to voltage (at the negative (-) 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 No.
DTC Detection Condition
Trouble Area
P1550
The following condition continues for 10 seconds or more with the ignition switch to the ON position
(1 trip detection logic):
  1. Difference between the maximum and minimum current values of the battery current sensor is 1 A or less
  1. Open or short in battery current sensor circuit
  2. Battery current sensor assembly
  3. ECM
P1551
Battery current sensor output value is 0.2 V or less for 0.5 seconds or more with the ignition switch to the ON position
(1 trip detection logic):
  1. Short in battery current sensor circuit
  2. Battery current sensor assembly
  3. ECM
P1552
Battery current sensor output value is 4.8 V or more for 0.5 seconds or more with the ignition switch to the ON position
(1 trip detection logic):
  1. Open in battery current sensor circuit
  2. Battery current sensor assembly
  3. ECM

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.2Gr-Fe Engine Control System.Sfi System. Dtc P1550 Battery Current Sensor Circuit


INSPECTION PROCEDURE

HINT:
Read freeze frame data using the intelligent tester. 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 (RAV4_ACA30 RM000000PDS09FX.html).
1.INSPECT BATTERY CURRENT SENSOR ASSEMBLY


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.2Gr-Fe Engine Control System.Sfi System. Dtc P1550 Battery Current Sensor Circuit

  1. Disconnect the battery current sensor connector.

  1. Measure the resistance of the battery current sensor.

    Standard resistance:
    Tester Connection
    		Specified Condition
    VC5 (2) - E2 (4)
    		0.1 to 10 kΩ
    VC5 (2) - IB (3)
    		Below 0.5 kΩ
    IB (3) - E2 (4)
    		0.05 to 10 kΩ


NG
REPLACE BATTERY CURRENT SENSOR ASSEMBLY
OK


2.CHECK HARNESS AND CONNECTOR (BATTERY CURRENT SENSOR - ECM)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.2Gr-Fe Engine Control System.Sfi System. Dtc P1550 Battery Current Sensor Circuit

  1. Disconnect the battery current sensor connector.

  1. Disconnect the ECM connectors.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance (Check for open):
    Tester Connection
    		Specified Condition
    IB (B31-3) - IB (B96-100)
    		Below 1 Ω
    VC5 (B31-2) - VCIB (B96-80)
    		Below 1 Ω
    E2 (B31-4) - EIB (B96-101)
    		Below 1 Ω
    THB (B31-1) - THB (B96-103)
    		Below 1 Ω
    Standard resistance (Check for short):
    Tester Connection
    		Specified Condition
    IB (B31-3) or IB (B96-100) - Body ground
    		10 kΩ or higher
    VC5 (B31-2) or VCIB (B96-80) - Body ground
    		10 kΩ or higher
    THB (B31-1) or THB (B96-103) - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (RAV4_ACA30 RM0000017UN01LX.html)