Dtc P1550 Battery Current Sensor Circuit

Двигатель. Toyota Rav4. Aca30, 33, 38 Ala30
Система Управления Двигателем 2Ad-Fhv. Toyota Rav4. Aca30, 33, 38 Ala30

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT BATTERY CURRENT SENSOR ASSEMBLY

CHECK WIRE HARNESS (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

The battery current sensor installed on the positive battery terminal detects the amount of current supplied from the alternator.
Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P1550 Battery Current Sensor Circuit
The battery current sensor changes current to voltage and outputs that voltage. The battery current sensor changes current at the positive battery terminal to voltage and sends it to the ECM. The ECM controls the voltage of the alternator 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 on (IG)
(1 trip detection logic):
  1. Difference between the maximum and minimum current values of the battery current sensor is 1 A or less
  1. Battery current sensor
  2. Wire harness or connector
  3. ECM
P1551
Battery current sensor output value is 0.2 V or less for 0.55 seconds or more with the ignition switch on (IG)
(1 trip detection logic)
  1. Battery current sensor
  2. Wire harness or connector
  3. ECM
P1552
Battery current sensor output value is 4.8 V or more for 0.55 seconds or more with the ignition switch on (IG)
(1 trip detection logic)
  1. Battery current sensor
  2. Wire harness or connector
  3. ECM

WIRING DIAGRAM

Refer to DTC P0516 (see page RAV4_ACA30 RM0000010BK00BX_02.html).

INSPECTION PROCEDURE

ПРИМЕЧАНИЕ:
After replacing the ECM, the new ECM needs registration (see page RAV4_ACA30 RM000000TJ4007X.html) and initialization (see page RAV4_ACA30 RM000000TIN007X.html).
УКАЗАНИЕ:
If DTCs relating to different systems are output, and they share terminal E2 as their ground, check this ground circuit first.
1.INSPECT BATTERY CURRENT SENSOR ASSEMBLY


    Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P1550 Battery Current Sensor Circuit

  1. Disconnect the B31 battery current sensor connector.

  1. Measure the resistance of the battery current sensor.

    Standard resistance:
    Tester Connection
    		Specified Condition
    B31-2 (VC5) - B31-4 (E2)
    		3 to 10 kΩ
    B31-3 (IB)- B31-4 (E2)
    		3 to 10 kΩ
    B31-2 (VC5) - B31-3 (IB)
    		Below 0.5 kΩ
    УКАЗАНИЕ:
    The resistance differs according to the tester type.

  1. Reconnect the battery current sensor connector.



NG
REPLACE BATTERY CURRENT SENSOR ASSEMBLY
OK


2.CHECK WIRE HARNESS (BATTERY CURRENT SENSOR - ECM)
Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P1550 Battery Current Sensor Circuit

  1. Disconnect the B31 battery current sensor connector.

  1. Disconnect the B32 ECM connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    B31-2 (VC5) - B32-70 (VCIB)
    		Below 1 Ω
    B31-3 (IB)- B32-116 (IB)
    		Below 1 Ω
    B31-4 (E2) - E1 (B32-109)
    		Below 1 Ω
    B31-2 (VC5) or B32-70 (VCIB) - Body ground
    		10 kΩ or higher
    B31-3 (IB)or B32-116 (IB) - Body ground
    		10 kΩ or higher

  1. Reconnect the battery current sensor connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE ECM