ELECTRIC POWER CONTROL SYSTEM, Diagnostic DTC:B22A6

DTC Code DTC Name
B22A6 THB Terminal Voltage Low

DESCRIPTION

The battery temperature sensor inside the current sensor detects changes in temperature as resistance values. In other words, when the temperature increases, the voltage decreases.

DTC Code DTC Detection Condition Trouble Area
B22A6 GND short in THB terminal of electric power control ECU

  • Battery current sensor

  • Passenger side junction block (Electric power control ECU)

  • Wire harness

WIRING DIAGRAM

A00192DE01
*a Battery Current Sensor Assembly
*b Electric Power Control ECU
*c Passenger Side Junction Block

PROCEDURE


  1. INSPECT BATTERY CURRENT SENSOR ASSEMBLY

    A0019A4E01

    1. Disconnect the A49 sensor connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition
      A49-1 (THB) - A49-4 (E2) 20 to 30°C (68 to 86°F) 1.5 to 2.1 kΩ
      (0 to 70°C (32 to 158°F)) (0.3 to 6.0 kΩ)

      Note

      The temperature shown in the inspection condition is for the area surrounding the sensor, not the sensor itself.


    NG

    REPLACE BATTERY CURRENT SENSOR ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (ELECTRIC POWER CONTROL ECU - BATTERY CURRENT SENSOR)

    A001FLLE01
    *1 Front view of wire harness connector: (to Electric Power Control ECU)
    *2 Front view of wire harness connector: (to Battery Current Sensor)

    1. Disconnect the A69 ECU connector.

    2. Disconnect the A49 sensor connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition
      A69-20 (THB) - A49-1 (THB) Always Below 1 Ω
      A69-20 (THB) or A49-1 (THB) - Body ground Always 10 kΩ or higher

    OK

    REPLACE PASSENGER SIDE JUNCTION BLOCK (ELECTRIC POWER CONTROL ECU)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR