Related Tests, Information and Procedures

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

System Wiring Diagram





PCM

1. Inspect the display of DTC U0101, U0121 and/or U0155, using the M-MDS. DTC Table Multiplex Communication System

2. Referring to the following table, determine the malfunctioning part of the CAN system. X: Normal-: Communication error






TCM

1. Inspect the display of DTC U0100 and/or U0121, using the M-MDS. DTC Table Multiplex Communication System

2. Referring to the following table, determine the malfunctioning part of the CAN system. X: Normal-: Communication error






EHPAS Control Module

1. Inspect the display of DTC U0100 and/or U2023, using the M-MDS. DTC Table Multiplex Communication System

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. -: Communication error






ABS HU/CM

1. Inspect the display of DTC U1900, using the M-MDS. DTC Table Multiplex Communication System

2. Referring to the following table, determine the malfunctioning part of the CAN system. X: Normal-: Communication error






Instrument Cluster

1. Inspect the display of DTC U0100, U0121, U0131, U0140 and/or U2023, using the M-MDS. DTC Table Multiplex Communication System

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. X: Normal-: Communication error






Climate Control Unit

1. Inspect the display of DTC U0140 and/or U0155, using the M-MDS. DTC Table Multiplex Communication System

2. Referring to the following table, determine the malfunctioning part of the CAN system. X: Normal-: Communication error






Information display

1. Inspect the display of DTC U0164, U0181 and/or U0184 using the input/output check mode. Testing and Inspection

2. Referring to the following table, determine the malfunctioning part of the CAN system. X: Normal-: Communication error






Audio unit (base unit)

1. Inspect the display of DTC 17:Er11, 18:Er11 and/or 19:Er11 using the on-board diagnostic test mode.

2. Referring to the following table, determine the malfunctioning part of the CAN system. X: Normal-: Communication error






Car-Navigation Unit

1. Inspect the display of DTC 17:Er11 using the on-board diagnostic test mode.

2. Referring to the following table, determine the malfunctioning part of the CAN system. X: Normal-: Communication error






BCM

1. Inspect the display of DTC U0100, U0155 and/or U0166 using the M-MDS. DTC Table Multiplex Communication System

2. Referring to the following table, determine the malfunctioning part of the CAN system. X: Normal-: Communication error






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, instrument cluster, BCM)
- U0516 (Climate control unit)
- U2012 (ABS HU/CM)
- U2516 (Instrument cluster, information display)
- 16:Er12 (Audio unit (base unit), car-navigation unit)
- If other DTC is present, perform the appropriate DTC inspection. DTC Table Multiplex Communication System