PLUG-IN CHARGE CONTROL SYSTEM, Diagnostic DTC:P31FC-410

DTC Code DTC Name
P31FC-410 On-Board Charger Status Circuit

DESCRIPTION

Refer to the description for DTC P0D67-844 Click here.

DTC No. INF Code DTC Detection Condition Trouble Area
P31FC 410 The CHST signal (charger status signal (duty signal)) does not change for a certain period of time.

  • Electric vehicle charger assembly

  • Plugin charge control ECU assembly

WIRING DIAGRAM

Refer to the wiring diagram for DTC P316C-846 Click here.

INSPECTION PROCEDURE

Tech Tips

After the repair, turn the power switch on (IG), wait for 10 seconds or more or plug-in charge the vehicle for at least 10 seconds, and check that DTCs are not output.

PROCEDURE


  1. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Plug-in Control / Trouble Codes.

    4. Check if DTCs are output.

      Result
      Result Proceed to
      Only P31FC-410 is output or P31FC-410 and DTCs other than U019B-440 are also output. A
      U019B-440 is output. B

    5. Turn the power switch off.


    B

    GO TO DTC CHART (U019B-440) Click here

    A

  2. CHECK PLUGIN CHARGE CONTROL ECU ASSEMBLY (CHECK WAVEFORM (CHST))

    Tech Tips

    The following procedure is used to check for a malfunction in an internal circuit of the plugin charge control ECU assembly.


    1. Connect the GTS to the DLC3.

    2. Connect an oscilloscope between the plugin charge control ECU assembly terminals specified in the table below.

    3. Turn the power switch on (IG).

    4. Enter the following menus: Powertrain / Plug-in Control / Data List

    5. Select "Charger State Pulse Duty Ratio" in the Data List.

      Tester Display Measurement Item/Range
      Charger State Pulse Duty Ratio

      Electric vehicle charger assembly charging status indicated by duty/

      Min.: 0.0 %, Max.: 100.0 %
    6. A0040G3E03
      Text in Illustration
      *a

      Component with harness connected

      (Plugin Charge Control ECU Assembly)

      Measure the waveform.

      Item Contents
      Tester Connection z12-29 (CHST) - S21-14 (E1)
      Equipment Setting 5 V/DIV., 50 ms/DIV.
      Condition Power switch on (IG)

      Tech Tips

      The waveform output from terminal CHST can be measured without connecting the electric vehicle charger cable assembly by turning the power switch on (IG).

    7. A00433HE01
      Text in Illustration
      *a Reference diagram for duty calculation

      Calculate duty (%) based on the CHST waveform.

      Tech Tips

      Calculate duty (%) using the following formula: Duty (%) = T1 / T2 x 100 (%)

    8. Compare the Data List item "Charger State Pulse Duty Ratio" with the duty (%) calculated based on CHST waveform.

      Result
      Result Proceed to
      The difference between "Charger State Pulse Duty Ratio" and the duty (%) calculated based on CHST waveform is less than 20 %. A
      The difference between "Charger State Pulse Duty Ratio" and the duty (%) calculated based on CHST waveform is 20 % or more. B

    9. Turn the power switch off.


    B

    REPLACE PLUGIN CHARGE CONTROL ECU ASSEMBLY Click here

    A

    REPLACE ELECTRIC VEHICLE CHARGER ASSEMBLY Click here