CXPI COMMUNICATION SYSTEM, Diagnostic DTC:B2352, B2354

DTC Code DTC Name
B2352 Lost Communication with Power Integration No.1 ECU
B2354 Lost Communication with Power Integration No.3 ECU

DESCRIPTION

This DTC is stored when CXPI communication between the semiconductor power integration ECU and main body ECU (multiplex network body ECU) stops for 10 seconds or more.

DTC No. Detection Item DTC Detection Condition Trouble Area
B2352 Lost Communication with Power Integration No.1 ECU No communication between No. 1 semiconductor power integration ECU and main body ECU (multiplex network body ECU) for 10 seconds or more

  • Main body ECU (multiplex network body ECU)

  • No. 1 semiconductor power integration ECU

  • Harness or connector
B2354 Lost Communication with Power Integration No.3 ECU No communication between No. 3 semiconductor power integration ECU and main body ECU (multiplex network body ECU) for 10 seconds or more

  • Main body ECU (multiplex network body ECU)

  • No. 3 semiconductor power integration ECU

  • Harness or connector

WIRING DIAGRAM

B000TZIE01
B000UCFE02

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the engine switch off to troubleshoot:

    Connect the GTS to the vehicle and turn a courtesy light switch on and off at 1.5 second intervals until communication between the GTS and vehicle begins.

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

  • Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU).

  • If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.

  • After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Click here

  • When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected.

    Click here

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Clear DTCs
      Result
      Result
      NEXT

    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      Result
      Reasult Proceed to
      All DTCs are output A
      DTC B2352 is output B
      DTC B2354 is output C

    B

    CHECK HARNESS AND CONNECTOR (NO. 1 SEMICONDUCTOR POWER INTEGRATION ECU - BATTERY AND BODY GROUND) Click here

    C

    CHECK HARNESS AND CONNECTOR (NO. 3 SEMICONDUCTOR POWER INTEGRATION ECU - BATTERY AND BODY GROUND) Click here

    A

  3. INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY


    1. Remove the driver side junction block assembly.

      Click here

      B000V08C02
      *a

      Component without harness connected

      (Driver Side Junction Block Assembly)

      		 - -

    2. Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      3A-29 - 3C-20 Always Below 1 Ω
      3A-29 - 3D-23 Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      3A-30 - 3C-27 Always Below 1 Ω
      3A-30 - 3D-32 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - DRIVER SIDE JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the P9 main body ECU (multiplex network body ECU) connector.

    2. Disconnect the 3A driver side junction block assembly connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      P9-5 (CXP1) - 3A-29 Always Below 1 Ω
      P9-5 (CXP1) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      P9-5 (CXP1) - 3A-30 Always Below 1 Ω
      P9-5 (CXP1) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. CHECK HARNESS AND CONNECTOR (NO. 1 SEMICONDUCTOR POWER INTEGRATION ECU - BATTERY AND BODY GROUND)


    1. Turn the engine switch off.

      B000U1UC04
      *a

      Front view of wire harness connector

      (to No. 1 Semiconductor Power Integration ECU)

      		 - -

    2. Disconnect the cable from the negative (-) battery terminal.

    3. Disconnect the A79 and A80 No. 1 semiconductor power integration ECU connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A80-6 (GND2) - Body ground Always Below 1 Ω
      A80-13 (GND1) - Body ground Always Below 1 Ω

    5. Connect the cable to the negative (-) battery terminal.

    6. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A79-1 (+B) - Body ground Always 8 to 14 V
      A80-9 (IG) - Body ground Engine switch on (IG) 8 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - NO. 1 SEMICONDUCTOR POWER INTEGRATION ECU)


    1. Turn the engine switch off.

    2. Disconnect the cable from the negative (-) battery terminal.

    3. Disconnect the P9 main body ECU (multiplex network body ECU) connector.

    4. Disconnect the A79 and A80 No. 1 semiconductor power integration ECU connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A80-7 (CXPI) - P9-5 (CXP1) Always Below 1 Ω
      A80-7 (CXPI) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NO. 1 SEMICONDUCTOR POWER INTEGRATION ECU Click here

    NG

  7. CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - NO. 1 SEMICONDUCTOR POWER INTEGRATION ECU)


    1. Turn the engine switch off.

    2. Disconnect the cable from the negative (-) battery terminal.

    3. Disconnect the A79 and A80 No. 1 semiconductor power integration ECU connectors.

    4. Disconnect the 3C driver side junction block assembly connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      A80-7 (CXPI) - 3C-20 Always Below 1 Ω
      A80-7 (CXPI) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      A80-7 (CXPI) - 3C-27 Always Below 1 Ω
      A80-7 (CXPI) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. CHECK HARNESS AND CONNECTOR (NO. 3 SEMICONDUCTOR POWER INTEGRATION ECU - BATTERY AND BODY GROUND)


    1. Turn the engine switch off.

      B000U1UC06
      *a

      Front view of wire harness connector

      (to No. 3 Semiconductor Power Integration ECU)

      		 - -

    2. Disconnect the cable from the negative (-) battery terminal.

    3. Disconnect the b11 and X99 No. 3 semiconductor power integration ECU connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      X99-6 (GND2) - Body ground Always Below 1 Ω
      X99-13 (GND1) - Body ground Always Below 1 Ω

    5. Connect the cable to the negative (-) auxiliary battery terminal.

    6. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      b11-1 (+B) - Body ground Always 8 to 14 V
      X99-9 (IG) - Body ground Engine switch on (IG) 8 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - NO. 3 SEMICONDUCTOR POWER INTEGRATION ECU)


    1. Turn the engine switch off.

    2. Disconnect the cable from the negative (-) battery terminal.

    3. Disconnect the P9 main body ECU (multiplex network body ECU) connector.

    4. Disconnect the b11 and X99 No. 3 semiconductor power integration ECU connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      X99-7 (CXPI) - P9-5 (CXP1) Always Below 1 Ω
      X99-7 (CXPI) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NO. 3 SEMICONDUCTOR POWER INTEGRATION ECU Click here

    NG

  10. CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - NO. 3 SEMICONDUCTOR POWER INTEGRATION ECU)


    1. Turn the engine switch off.

    2. Disconnect the cable from the negative (-) battery terminal.

    3. Disconnect the b11 and X99 No. 3 semiconductor power integration ECU connectors.

    4. Disconnect the 3D driver side junction block assembly connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      X99-7 (CXPI) - 3D-23 Always Below 1 Ω
      X99-7 (CXPI) - Body ground Always 10 kΩ or higher
      for LHD
      Tester Connection Condition Specified Condition
      X99-7 (CXPI) - 3D-32 Always Below 1 Ω
      X99-7 (CXPI) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR