Initial Inspection and Diagnostic Overview
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. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) DTC Table [Multiplex Communication System]
2. Referring to the following table, determine the malfunctioning part of the CAN system.
TCM
1. Inspect the display of DTC U0100 and/or U0121, using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) DTC Table [Multiplex Communication System]
2. Referring to the following table, determine the malfunctioning part of the CAN system.
EHPAS Control Module
1. Inspect the display of DTC U0100 and/or U2023, using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) 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.
ABS HU/CM
1. Inspect the display of DTC U1900, using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) DTC Table [Multiplex Communication System]
2. Referring to the following table, determine the malfunctioning part of the CAN system.
Instrument Cluster
1. Inspect the display of DTC U0100, U0121, U0131, U0140 and/or U2023, using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) DTC Table [Multiplex Communication System]
CAUTION: DTC U2023 may not be cleared during engine starting even if DTC clearing is done using the MMDS. 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.
Climate Control Unit
1. Inspect the display of DTC U0140 and/or U0155, using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) DTC Table [Multiplex Communication System]
2. Referring to the following table, determine the malfunctioning part of the CAN system.
Information display
1. Inspect the display of DTC U0164, U0181 and/or U0184 using the input/output check mode. (See INFORMATION DISPLAY INPUT/OUTPUT CHECK MODE.) Component Tests and General Diagnostics
2. Referring to the following table, determine the malfunctioning part of the CAN system.
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.
Car-Navigation Unit
1. Inspect the display of DTC 1 7:Er11 using the on-board diagnostic test mode.
2. Referring to the following table, determine the malfunctioning part of the CAN system.
BCM
1. Inspect the display of DTC U0100, U0155 and/or U0166 using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) DTC Table [Multiplex Communication System]
2. Referring to the following table, determine the malfunctioning part of the CAN system.
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. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) DTC Table [Multiplex Communication System]