Initial Inspection and Diagnostic Overview

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

System Wiring Diagram

System Wiring Diagram:

PCM
1. Check the display of DTC 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.






EPS Control Module
1. Check the display of DTC U1900, using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) Diagnostic Trouble Code Descriptions
Malfunction location
- Wiring harness 1
- Wiring harness 2
- Wiring harness 3
- Wiring harness 5
- PCM
- ABS HC/CM or DSC HU/CM
- EPS control module

ABS HU/CM or DSC HU/CM
1. Check the display of DTC U1900, using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) Diagnostic Trouble Code Descriptions
Malfunction location
- Wiring harness 1
- Wiring harness 3
- Wiring harness 5
- Wiring harness 6
- Wiring harness 8
- Wiring harness 10
- Wiring harness 11
- PCM
- Steering angle sensor
- ABS HU/CM or DSC HU/CM

TCM
1. Check the display of DTC U0100, using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) Diagnostic Trouble Code Descriptions
Malfunction location
- Wiring harness 1
- Wiring harness 3
- Wiring harness 4
- PCM
- TCM

Keyless Control Module
1. Check the display of DTC U1900, using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) Diagnostic Trouble Code Descriptions
Malfunction location
- Wiring harness 1
- Wiring harness 3
- Wiring harness 6
- Wiring harness 7
- PCM
- Keyless control module

Steering Angle Sensor
1. Check the display of DTC U1900, using the M-MDS. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM].) Diagnostic Trouble Code Descriptions
Malfunction location
- Wiring harness 11
- DSC HU/CM
- Steering angle sensor

Instrument Cluster
1. Access and monitor the "PCM_MSG", "EPS_MSG", "TPM_MSG", "TCM_MSG" and "ABS_MSG" of PID using the M-MDS.
2. Referring to the PID/DATA MONITOR, confirm the display status of the PID. (See PID/DATA MONITOR TABLE [MULTIPLEX COMMUNICATION SYSTEM].) Pinout Values and Diagnostic Parameters
3. Referring to the following table, determine the malfunctioning part of the CAN system.