Body Control Systems: Testing and Inspection
PROCEDURES FOR DETERMINING THE LOCATION OF A MALFUNCTION [MULTIPLEX COMMUNICATION SYSTEM]System Wiring Diagram
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].) Diagnostic Trouble Code Descriptions
2. Referring to the following table, determine the malfunctioning part of the CAN system.
Without Power Retractable Hardtop
Without Power Retractable Hardtop:
With Power Retractable Hardtop
With Power Retractable Hardtop:
TCM
1. Inspect the display of DTC U0100 using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) Diagnostic Trouble Code Descriptions
2. Referring to the following table, determine the malfunctioning part of the CAN system.
DSC HU/CM or ABS HU/CM
1. Inspect the display of DTC U0100 (DSC), U0101 (DSC), U0155 (DSC), U1900 and/or U2023, using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) Diagnostic Trouble Code Descriptions
2. Referring to the following table, determine the malfunctioning part of the CAN system.
Without Power Retractable Hardtop
Without Power Retractable Hardtop:
With Power Retractable Hardtop
With Power Retractable Hardtop:
Power Retractable Hardtop Control Module
1. Inspect the display of DTC U0100, U0101 and/or U2197, using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) Diagnostic Trouble Code Descriptions
2. Referring to the following table, determine the malfunctioning part of the CAN system.
Keyless Control Module
1. Inspect the display of DTC U0100, U0323 and/or U2023 using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) Diagnostic Trouble Code Descriptions
2. Referring to the following table, determine the malfunctioning part of the CAN system.
Without Power Retractable Hardtop
Without Power Retractable Hardtop:
With Power Retractable Hardtop
With Power Retractable Hardtop:
Steering Angle Sensor
1. Inspect the display of DTC U1900 using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) Diagnostic Trouble Code Descriptions
2. Referring to the following table, determine the malfunctioning part of the CAN system.
Without Power Retractable Hardtop
Without Power Retractable Hardtop:
With Power Retractable Hardtop
With Power Retractable Hardtop:
Instrument Cluster
1. Inspect the display of DTC U0100, U0101, U0121, and/or U0214, using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) Diagnostic Trouble Code Descriptions
2. Referring to the following table, determine the malfunctioning part of the CAN system.
Without Power Retractable Hardtop
Without Power Retractable Hardtop:
With Power Retractable Hardtop
With Power Retractable Hardtop:
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, DSC HU/CM, ABS HU/CM, keyless control module, instrument cluster, power retractable hardtop control module)
- U2516 (steering angle sensor)
- If other DTC is present, perform the appropriate DTC inspection. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) Diagnostic Trouble Code Descriptions