Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Toyota >> 2017 >> Yaris iA Automatic Trans >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Lin Communication System - Diagnostic Codes >> Lin Communication System >> DTC U0322-09: Software Incompatibility with Body Control Module Component Failures >> Procedure

DTC U0322-09: Software Incompatibility with Body Control Module Component Failures: Procedure

  1. INSPECT MAIN BODY ECU CONNECTOR CONDITION 
    1. Switch the ignition off.
    2. Disconnect the negative battery cable.

      Refer to REMOVAL

    3. Disconnect the main body ECU connector.
    4. Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
    5. Is the connector normal?

    No 

    See step  15

    Yes 

    See step  2

  2. INSPECT POWER SOURCE CONTROL (POWER MANAGEMENT CONTROL ECU) CONNECTOR CONDITION 
    1. Disconnect the power source control (power management control ECU) connector.
    2. Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
    3. Is the connector normal?

    No 

    See step  14

    Yes 

    See step  3

  3. INSPECT LIN COMMUNICATION CIRCUIT BETWEEN MAIN BODY ECU AND POWER SOURCE CONTROL (POWER MANAGEMENT CONTROL ECU) FOR SHORT TO GROUND 
    1. Verify that the main body ECU and power source control (power management control ECU) connectors are disconnected.
    2. Inspect for continuity between main body ECU terminal E1-13 (wiring harness-side) and body ground.
    3. Is there continuity?

    Yes 

    See step  13

    No 

    See step  4

  4. INSPECT LIN COMMUNICATION CIRCUIT BETWEEN MAIN BODY ECU AND POWER SOURCE CONTROL (POWER MANAGEMENT CONTROL ECU) FOR SHORT TO POWER SUPPLY 
    1. Verify that the main body ECU and power source control (power management control ECU) connectors are disconnected.
    2. Connect the negative battery cable.

      Refer to REMOVAL

    3. Switch the ignition ON (engine off or on).
    4. Measure the voltage at the main body ECU terminal E1-13 (wiring harness-side).
    5. Is the voltage 0 V?

    No 

    See step  12

    Yes 

    See step  5

  5. INSPECT LIN COMMUNICATION CIRCUIT BETWEEN MAIN BODY ECU AND POWER SOURCE CONTROL (POWER MANAGEMENT CONTROL ECU) FOR OPEN CIRCUIT 
    1. Switch the ignition off.
    2. Disconnect the negative battery cable.

      Refer to REMOVAL

    3. Verify that the main body ECU and power source control (power management control ECU) connectors are disconnected.
    4. Inspect the wiring harness for continuity between main body ECU terminal E1-13 (wiring harness-side) and power source control (power management control ECU) terminal E3-15 (wiring harness-side).
    5. Is there continuity?

    No 

    See step  11

    Yes 

    See step  6

  6. VERIFY IF MALFUNCTIONING LOCATION IS MAIN BODY ECU DEPENDING ON REPEATABILITY 
    1. Always reconnect all disconnected connectors.
    2. Connect the negative battery cable.

      Refer to REMOVAL

    3. Clear the DTC for the power source control (power management control ECU) using the Techstream.

      Refer to DTC CHECK / CLEAR

      Body Electrical > Electric Supply Unit > Clear DTCs 

    4. Switch the ignition ON (engine off or on) and wait for 2 s or more.
    5. Retrieve the power source control (power management control ECU) DTCs using the Techstream.

      Refer to DTC CHECK / CLEAR

      Body Electrical > Electric Supply Unit > Trouble Codes 

    6. Is the same DTC displayed?

    No 

    See step  8

    Yes 

    See step  10

  7. VERIFY THAT REPAIRS HAVE BEEN COMPLETED 
    1. Always reconnect all disconnected connectors.
    2. Connect the negative battery cable.

      Refer to REMOVAL

    3. Clear the DTC for the power source control (power management control ECU) using the Techstream.

      Refer to DTC CHECK / CLEAR

      Body Electrical > Electric Supply Unit > Clear DTCs 

    4. Switch the ignition ON (engine off or on) and wait for 2 s or more.
    5. Retrieve the power source control (power management control ECU) DTCs using the Techstream.

      Refer to DTC CHECK / CLEAR

      Body Electrical > Electric Supply Unit > Trouble Codes 

    6. Is the same DTC displayed?

    Yes 

    See step  9

    No 

    See step  8

  8. VERIFY IF OTHER DTCS DISPLAYED 
    1. Are any other DTCs displayed?

    No 

    DTC TROUBLESHOOTING COMPLETED. 

    Yes 

    REPAIR OR REPLACE THE MALFUNCTIONING PART ACCORDING TO THE APPLICABLE DTC TROUBLESHOOTING. 

    1. Refer to DIAGNOSTIC TROUBLE CODE CHART
  9. REPEAT THE INSPECTION FROM STEP 1. 
    1. If the malfunction recurs, replace the power source control (power management control ECU).

      Refer to REMOVAL

    NEXT 

    See step  8

  10. REPLACE THE MAIN BODY ECU. 
    1. Refer to REMOVAL

    NEXT 

    See step  7

  11. REFER TO THE WIRING DIAGRAM AND VERIFY WHETHER OR NOT THERE IS A COMMON CONNECTOR BETWEEN MAIN BODY ECU TERMINAL E1-13 AND POWER SOURCE CONTROL (POWER MANAGEMENT CONTROL ECU) TERMINAL 3E-15. 

    If there is a common connector: 

    1. Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
    2. Repair or replace the malfunctioning part.

    If there is no common connector: 

    1. Repair or replace the wiring harness which has an open circuit.

    NEXT 

    See step  7

  12. REFER TO THE WIRING DIAGRAM AND VERIFY WHETHER OR NOT THERE IS A COMMON CONNECTOR BETWEEN MAIN BODY ECU TERMINAL E1-13 AND POWER SOURCE CONTROL (POWER MANAGEMENT CONTROL ECU) TERMINAL E3-15. 

    If there is a common connector: 

    1. Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.
    2. Repair or replace the malfunctioning part.

    If there is no common connector: 

    1. Repair or replace the wiring harness which has a short to power supply.

    NEXT 

    See step  7

  13. REFER TO THE WIRING DIAGRAM AND VERIFY WHETHER OR NOT THERE IS A COMMON CONNECTOR BETWEEN MAIN BODY ECU TERMINAL E1-13 AND POWER SOURCE CONTROL (POWER MANAGEMENT CONTROL ECU) TERMINAL E3-15. 

    If there is a common connector: 

    1. Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
    2. Repair or replace the malfunctioning part.

    If there is no common connector: 

    1. Repair or replace the wiring harness which has a short to ground.

    NEXT 

    See step  7

  14. REPAIR OR REPLACE THE CONNECTOR. 

    NEXT 

    See step  7

  15. REPAIR OR REPLACE THE CONNECTOR. 

    NEXT 

    See step  7

scientia non olet · About Mike's Workshop Manuals