PROCEDURES FOR DETERMINING THE LOCATION OF A MALFUNCTION [MULTIPLEX COMMUNICATION SYSTEM]

System Wiring Diagram

System Wiring Diagram

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PCM
1. Inspect the display of DTC U0101, U0121 and/or U0155, using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) See: A L L Diagnostic Trouble Codes ( DTC ) > Diagnostic Trouble Code Descriptions
2. Referring to the following table, determine the malfunctioning part of the CAN system.

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TCM
1. Inspect the display of DTC U0100 using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) See: A L L Diagnostic Trouble Codes ( DTC ) > Diagnostic Trouble Code Descriptions
2. Referring to the following table, determine the malfunctioning part of the CAN system.

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EHPAS Control Module
1. Inspect the display of DTC U0100 and/or U2023, using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) See: A L L Diagnostic Trouble Codes ( DTC ) > Diagnostic Trouble Code Descriptions

CAUTION: DTC U2023 may not be cleared during engine starting even if DTC clearing is done using the M-MDS. When clearing DTC U2023, execute with the ignition switch in the ON position (Engine off).

NOTE: You may want to check which unit is malfunctioning according to Freeze Frame Data. "Electrical" > "IC Service Function" > "Freeze Frame Data".This function is supported on IDS, not PDS.

2. Referring to the following table, determine the malfunctioning part of the CAN system.

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DSC HU/CM or ABS HU/CM
1. Inspect the display of DTC U1900, U2202 and/or U2523, using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) See: A L L Diagnostic Trouble Codes ( DTC ) > Diagnostic Trouble Code Descriptions
2. Referring to the following table, determine the malfunctioning part of the CAN system.

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Instrument Cluster
1. Inspect the display of DTC U0100, U0101, U0121, U0127 and/or U0131 using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) See: A L L Diagnostic Trouble Codes ( DTC ) > Diagnostic Trouble Code Descriptions
2. Referring to the following table, determine the malfunctioning part of the CAN system.

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3. Inspect the display of DTC U0140, U0151 and/or U0184, using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) See: A L L Diagnostic Trouble Codes ( DTC ) > Diagnostic Trouble Code Descriptions
4. Referring to the following table, determine the malfunctioning part of the CAN system.

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Climate Control Unit
1. Inspect the display of DTC U0140, U0155 and/or U0184, using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) See: A L L Diagnostic Trouble Codes ( DTC ) > Diagnostic Trouble Code Descriptions
2. Referring to the following table, determine the malfunctioning part of the CAN system.

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SAS Control Module
1. Inspect the display of DTC U1900 using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) See: A L L Diagnostic Trouble Codes ( DTC ) > Diagnostic Trouble Code Descriptions
2. Referring to the following table, determine the malfunctioning part of the CAN system.

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Information Display
1. Inspect the display of DTC U0164, U01B1 and/or U0184 using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) See: A L L Diagnostic Trouble Codes ( DTC ) > Diagnostic Trouble Code Descriptions
2. Referring to the following table, determine the malfunctioning part of the CAN system.

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PJB
1. Inspect the display of DTC U1900 using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) See: A L L Diagnostic Trouble Codes ( DTC ) > Diagnostic Trouble Code Descriptions
2. Referring to the following table, determine the malfunctioning part of the CAN system.

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Repair Procedure
1. Inspect the connector of malfunctioning module.
    -  If there is any malfunction, repair or replace the connector.

2. Inspect the malfunctioning wiring harnesses as follow:
    -  If there is any malfunction, repair or replace the wiring harnesses.
    -  If there is no malfunction, replace the malfunctioning module.
       -  Short to GND
       -  Short to power supply
       -  Twisted pair short each other
       -  Open circuit

3. Make sure to reconnect all disconnected connectors.
4. Clear the CAN system related DTCs using the M-MDS.
5. Verify if the CAN system related DTCs are displayed using the M-MDS.
    -  If the same following DTCs are present, replace the malfunctioning module.
       -  U0073 (PCM, TCM, EHPAS control module, TPMS control module, instrument cluster, climate control unit, SAS control module)
       -  U0516 (TPMS control module, climate control unit)
       -  U1900 (PJB)
       -  U2012 (DSC HU/CM, ABS HU/CM)
       -  U2516 (Instrument cluster)

    -  If other DTC is present, perform the appropriate DTC inspection. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) See: A L L Diagnostic Trouble Codes ( DTC ) > Diagnostic Trouble Code Descriptions

Body Control Systems

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