HYBRID CONTROL SYSTEM, Diagnostic DTC:P1C2D-587

DTC Code DTC Name
P1C2D-587 Hybrid Battery Voltage / DC/DC Converter Voltage Correlation

DESCRIPTION

For a description of the boost converter Click here.

The MG ECU uses a voltage sensor (VL) that is built into the boost converter to detect the high voltage before it is boosted. The ECU also uses the battery smart unit to detect HV battery voltage (VB).

Tech Tips

Using the intelligent tester, check the Data List of HV battery voltage and current. If these values are not within the below range, there is a battery smart unit malfunction.

A004YGZE02
*1 HV Battery Voltage to HV Battery Current (20 to 40°C (68 to 104°F))
*2 HV Battery Voltage (V)
*3 HV Battery Current (A)
DTC No. INF Code DTC Detection Condition Trouble Area
P1C2D 587 Voltages from HV battery voltage (VB) sensor and boost converter voltage (VL) sensor deviate

  • Inverter with converter assembly

  • Battery smart unit

PROCEDURE


  1. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / DTC.

    4. Check if DTCs are output.

      Result
      Result Proceed to
      DTC P1C2D-587 only is output. Alternatively, P1C2D-587 and any DTCs other than P0B23-129, P0CA3-442 or P0E32-585 are output. A
      P0B23-129 and P1C2D-587 (HV battery voltage circuit malfunction) are output. B
      P0CA3-442 and P1C2D-587 (abnormal voltage execution value) are output. C
      P0E32-585 and P1C2D-587 (boost converter voltage (VL) sensor performance problem) are output. D

    5. Turn the power switch off.


    B

    GO TO DTC CHART (P0B23-129) Click here

    C

    REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS Click here

    D

    GO TO DTC CHART (P0E32-585) Click here

    A

  2. CLEAR DTC


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / DTC.

    4. Read and record the DTCs and freeze frame data.

    5. Clear DTCs and freeze frame data.

    6. Turn the power switch off.


    NEXT

  3. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (READY). (*1)

    3. Enter the following menus: Powertrain / Hybrid Control / Data List. (*2)

    4. If both HV battery voltage (VB) and VL-Voltage before Boosting are less than 220 V, move the shift lever to D and depress both the accelerator pedal and brake pedal at the same time to raise them to 220 V or more. (*3)

    5. Push the P position switch. (*4)

    6. Set the air conditioning to MAX COOL and turn the headlights on. (*5)

    7. Confirm that "Batt Pack Current Val" is more than 3 A. (*6)

    8. Leave the vehicle for 15 seconds with the engine stopped during steps (*4) (*5) and (*6). (*7)

    9. Enter the following menus: Powertrain / Hybrid Control / DTC. (*8)

    10. Check if DTCs are output. (*9)

      Note

      If the low battery charge warning light comes on, push the P position switch and start the engine to charge the HV battery. After the engine stops, perform steps (*1) through (*9) again.

      Result
      Result Proceed to
      No DTCs are output, or DTCs other than the following are output. A
      P0B23-129 (HV battery voltage circuit malfunction) is output. B
      P0E32-585 (boost converter voltage (VL) sensor performance problem) is output. C
      P3000-388 (discharge inhibition) is output. D
      P3004-132 (high voltage power supply line problem) is output. E

    11. Turn the power switch off.


    B

    REPLACE BATTERY SMART UNIT Click here

    C

    REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS Click here

    D

    LEAVE VEHICLE WITH PARK (P) SELECTED, AND CHARGE HV BATTERY BY IDLING UNTIL IDLING STOPS (PERFORM STEPS (*1) THROUGH (*9))

    E

    REPLACE BATTERY SMART UNIT Click here

    A

  4. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Turn the power switch on (READY).

    2. Perform a road test that repeats full acceleration to 60 km/h (37 mph) and then braking to a complete stop three times. (*10)

    3. Connect the intelligent tester to the DLC3.

    4. Enter the following menus: Powertrain / Hybrid Control / DTC. (*11)

    5. Check if DTCs are output. (*12)

      Result
      Result Proceed to
      No DTCs are output, or DTCs other than the following are output. A
      P0B23-129 (HV battery voltage circuit malfunction) is output. B
      P0E32-585 (boost converter voltage (VL)) sensor performance problem) is output. C
      P3000-388 (discharge inhibition) is output. D
      P3004-132 (high voltage power supply line problem) is output. E

    6. Turn the power switch off.


    B

    REPLACE BATTERY SMART UNIT Click here

    C

    REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS Click here

    D

    LEAVE VEHICLE WITH PARK (P) SELECTED, AND CHARGE HV BATTERY BY IDLING UNTIL IDLING STOPS (PERFORM STEPS (*10) THROUGH (*12))

    E

    REPLACE BATTERY SMART UNIT Click here

    A

  5. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (READY).

    3. Enter the following menus: Powertrain / Hybrid Control / Data List.

    4. Select HV battery voltage (VB), VL-Voltage before Boosting and VH-Voltage after Boosting in the Data List.

    5. If both HV battery voltage (VB) and VL-Voltage before Boosting are less than 220 V, move the shift lever to D and depress both the accelerator pedal and brake pedal at the same time to raise them to 220 V or more.

    6. Turn the engine off, push the P position switch, and read the Data List when the vehicle is stationary.

      Result
      Result Proceed to
      Both of the following are not satisfied. A

      Both of the following are satisfied:


      • Difference between "Power Resource VB" and "VH-Voltage after Boosting" is less than 5 V.

      • Difference between VL-Voltage before Boosting and "VH-Voltage after Boosting" is more than 35 V.

      		 B

      Both of the following are satisfied:


      • Difference between "VH-Voltage after Boosting" and "VL-Voltage before Boosting" is more than 5 V.

      • Difference between "Power Resource VB" and "VH-Voltage after Boosting" is less than 15 V.

      		 C

    7. Turn the power switch off.


    B

    REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS Click here

    C

    REPLACE BATTERY SMART UNIT Click here

    A

  6. CHECK FREEZE FRAME DATA (HYBRID CONTROL)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / DTC.

    4. Read the freeze frame data of DTC P1C2D-587.

      Result
      Result Proceed to
      Both of the following are satisfied or both of the following are not satisfied. A
      "Power Resource VB" is less than 160 V or more than 285 V. B
      "VL-Voltage before Boosting" is less than 160 V or more than 285 V. C

    5. Turn the power switch off.


    B

    REPLACE BATTERY SMART UNIT Click here

    C

    REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS Click here

    A

  7. CHECK FREEZE FRAME DATA (HYBRID CONTROL)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / DTC.

    4. Read the freeze frame data of DTC P1C2D-587.

      Tech Tips

      In the freeze frame data, read the HV battery voltage value and all of the battery block voltage values.

      Result
      Result Proceed to
      Others (Freeze frame data is not stored). A

      Both of the following are satisfied:


      • Sum of all "Battery Block" voltage is more than (HV battery voltage - 40 V)

      • Sum of all "Battery Block" voltage is less than (HV battery voltage + 25 V)

      		 B
      Neither A nor B is satisfied. C

    5. Turn the power switch off.


    B

    REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS Click here

    C

    REPLACE BATTERY SMART UNIT Click here

    A

  8. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (READY).

    3. Enter the following menus: Powertrain / Hybrid Control / Data List.

    4. If both HV battery voltage (VB) and VL-Voltage before Boosting are less than 220 V, move the shift lever to D and depress both the accelerator pedal and brake pedal at the same time to raise them to 220 V or more.

    5. Turn the engine off, push the P position switch, and read the Data List of all battery block and HV battery voltages, when the vehicle is stationary.

      Result
      Result Proceed to

      Both of the following are satisfied:


      • Sum of all "Battery Block" voltage is more than (HV battery voltage -40 V)

      • Sum of all "Battery Block" voltage is less than (HV battery voltage +25 V)

      		 A
      The preceding condition is not satisfied. B

    6. Turn the power switch off.


    A

    REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS Click here

    B

    REPLACE BATTERY SMART UNIT Click here