DETERMINING MALFUNCTIONING PART (MS-CAN) [MULTIPLEX COMMUNICATION SYSTEM (L.H.D.)]

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Caution

•  If the malfunctioning part is detected in the communication line, before disconnecting the related connector for inspection, press the connector in the connection direction to verify that there is no looseness or disconnection.

•  When disconnecting the connector, verify that there is no damage, deformation, or corrosion of the connector terminals.

1.  Verify DTCs of the modules related to the CAN system.

2.  Apply the following items to the DTC Output Pattern and Malfunctioning Part, and then verify the reference to the malfunctioning location.

•  Communication error DTCs

•  Malfunctioning module

3.  Inspect the possible cause and inspection item of the applicable malfunctioning part.

4.  Perform the DTC inspection after the repair procedure.

•  If any DTC is displayed, return to FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (L.H.D.)].

DTC Output Pattern and Malfunctioning Part

A

Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion

•  Open circuit in wiring harness between audio unit and connector C-14

•  Open circuit in wiring harness between connector C-14 and branch A

•  Open circuit in wiring harness between branch A and resistor

•  Audio unit malfunction

•  Resistor malfunction

System wiring diagram

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Inspection item

•  Audio unit connector

•  Resistor connector

•  Connector C-14

•  Wiring harness between audio unit terminal 1O and connector C-14

•  Wiring harness between audio unit terminal 1Q and connector C-14

•  Wiring harness between connector C-14 and branch A

•  Wiring harness between resistor terminal A and branch A

•  Wiring harness between resistor terminal B and branch A

•  Audio unit

•  Resistor

B

Possible cause

•  Connector terminal disconnection, poor contact, damage, deformation, corrosion

•  Open circuit in wiring harness between HF/TEL unit and branch A

•  HF/TEL unit malfunction

System wiring diagram

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Inspection item

•  HF/TEL unit connector

•  Wiring harness between HF/TEL unit terminal Q and branch A

•  Wiring harness between HF/TEL unit terminal R and branch A

•  HF/TEL unit