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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 the CAN system-related module DTCs and the failed module on the M-MDS screen.

2.Refer to DTC Output Pattern and Malfunctioning Part and find the area linked from the malfunctioning part.

Note

• A hyphen (-) in the DTC output pattern cell indicates that the DTC may be displayed depending on the malfunction detection conditions. If it is not displayed, the malfunctioning part can be determined by checking only the crosses (×).

• If any of the following DTCs is displayed alone, perform the applicable DTC inspection. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM (L.H.D. (L5))].)

― TCM: U0401:00, U0415:00

― DSC HU/CM: U2023

― Keyless control module: U2023

― Instrument cluster: U0100:87, U0401:68, U0401:92, U0402:68, U0402:92, U0415:68, U0415:92, U0422:68, U0452:92, U0515:68, U0515:92, U2005:86

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. (L5))].

DTC Output Pattern and Malfunctioning Part

Cross (×): DisplayedHyphen (-): May or may not be displayed

A

Possible cause

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

• Open circuit in wiring harness between PCM and branch A

• PCM malfunction

System wiring diagram

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Inspection item

• PCM connector

• Wiring harness between PCM terminal 1AM and branch A

• Wiring harness between PCM terminal 1AI and branch A

• PCM

B

Possible cause

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

• Open circuit in wiring harness between TCM and branch A

• TCM malfunction

System wiring diagram

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Inspection item

• TCM connector

• Wiring harness between TCM terminal 2W and branch A

• Wiring harness between TCM terminal 2X and branch A

• TCM

C

Possible cause

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

• Open circuit in wiring harness between branch A and branch B

System wiring diagram

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Inspection item

• Wiring harness between branch A and branch B

D

Possible cause

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

• Open circuit in wiring harness between DSC HU/CM and branch B

• DSC HU/CM malfunction

System wiring diagram

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Inspection item

• DSC HU/CM connector

• Wiring harness between DSC HU/CM terminal X and branch B

• Wiring harness between DSC HU/CM terminal W and branch B

• DSC HU/CM

E

Possible cause

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

• Open circuit in wiring harness between branch B and BCM

• Open circuit in wiring harness between BCM and branch C

• BCM malfunction

System wiring diagram

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Inspection item

• BCM connector

• Wiring harness between BCM terminal 1F and branch B

• Wiring harness between BCM terminal 1D and branch B

• Wiring harness between BCM terminal 5C and branch C

• Wiring harness between BCM terminal 5F and branch C

• BCM

F

Possible cause

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

• Open circuit in wiring harness SAS control module and branch C

• SAS control module malfunction

System wiring diagram

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Inspection item

• SAS control module connector

• Wiring harness between SAS control module terminal 2E and branch C

• Wiring harness between SAS control module terminal 2F and branch C

• SAS control module

G

Possible cause

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

• Open circuit in wiring harness between branch C and BCM

System wiring diagram

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Inspection item

• BCM connector

• Wiring harness between BCM terminal 5I and branch C

• Wiring harness between BCM terminal 5L and branch C

H

Possible cause

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

• Open circuit in wiring harness between BCM and branch D

• BCM malfunction

System wiring diagram

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Inspection item

• BCM connector

• Wiring harness between BCM terminal 3U and branch D

• Wiring harness between BCM terminal 3W and branch D

• BCM

I

Possible cause

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

• Open circuit in wiring harness branch D and branch E

System wiring diagram

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Inspection item

• Wiring harness between branch D and branch E

J

Possible cause

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

• Open circuit in wiring harness keyless control module and branch E

• Keyless control module malfunction

System wiring diagram

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Inspection item

• Keyless control module connector

• Wiring harness between keyless control module terminal 3X and branch E

• Wiring harness between keyless control module terminal 3W and branch E

• Keyless control module

K

Possible cause

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

• Open circuit in wiring harness between branch E and instrument cluster

• Instrument cluster malfunction

System wiring diagram

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Inspection item

• Instrument cluster connector

• Wiring harness between instrument cluster terminal 2R and branch E

• Wiring harness between instrument cluster terminal 2T and branch E

• Instrument cluster