DETERMINING OPEN CIRCUIT LOCATION (CAN-BUS No.7) [(E)]

id1002x2004100

Caution

•  Perform the following malfunction diagnosis only when it is diagnosed with a open circuit by CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)

•  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 module displayed in red or blue on the M-MDS screen.

2.  Apply the communication error DTC and the module displayed in red or blue to the DTC output pattern and malfunctioning location, and select the possible cause for the diagnostic result and the reference for the inspection item. (See DTC Output Pattern And Malfunctioning Location)

Note

•  The open circuit location can be determined by the DTC indicated in the DTC output pattern and malfunctioning location chart. DTCs not listed in the chart are not used for the determination of the open circuit location. (See DTC Output Pattern And Malfunctioning Location.)

•  The module may be displayed in red or blue on the M-MDS screen even if there is no malfunction depending on the vehicle specification.

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

DTC Output Pattern And Malfunctioning Location

A

Possible cause

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

•  Connectivity master unit (CMU) (Except Chinese specs.)/Audio control unit (ACU) (Chinese specs.) power supply voltage or body ground malfunction

•  Open circuit in wiring harness between connectivity master unit (CMU) (Except Chinese specs.)/audio control unit (ACU) (Chinese specs.) and connector C-13

•  Open circuit in wiring harness between connector C-13 and connector C-48

•  Connector C-13 malfunction

•  Connector C-48 malfunction

•  Connectivity master unit (CMU) (Except Chinese specs.)/Audio control unit (ACU) (Chinese specs.) malfunction

System wiring diagram

am3zzw00027580

Inspection item

•  Connectivity master unit (CMU) (Except Chinese specs.)/Audio control unit (ACU) (Chinese specs.) power supply voltage-related wiring harness and fuse

•  Connectivity master unit (CMU) (Except Chinese specs.)/Audio control unit (ACU) (Chinese specs.) body ground related wiring harness

•  Connectivity master unit (CMU) (Except Chinese specs.)/Audio control unit (ACU) (Chinese specs.) connector

•  Wiring harness between connectivity master unit (CMU) (Except Chinese specs.)/audio control unit (ACU) (Chinese specs.) terminal 1Q and connector C-13

•  Wiring harness between connectivity master unit (CMU) (Except Chinese specs.)/Audio control unit (ACU) (Chinese specs.) terminal 1O and connector C-13

•  Wiring harness between connector C-13 and connector C-48

•  Connector C-13

•  Connector C-48

•  Connectivity master unit (CMU) (Except Chinese specs.)/Audio control unit (ACU) (Chinese specs.)

B

Possible cause

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

•  Audio amplifier power supply voltage or body ground malfunction

•  Open circuit in wiring harness between audio amplifier and connector C-48

•  Connector C-48 malfunction

•  Audio amplifier malfunction

System wiring diagram

am3zzw00027581

Inspection item

•  Audio amplifier power supply voltage-related wiring harness and fuse

•  Audio amplifier body ground related wiring harness

•  Audio amplifier connector

•  Wiring harness between audio amplifier terminal 2N and connector C-48 (with Bose^® type audio)

•  Wiring harness between audio amplifier terminal 2M and connector C-48 (with Bose^® type audio)

•  Wiring harness between audio amplifier terminal 1Q and connector C-48 (without Bose^® type audio)

•  Wiring harness between audio amplifier terminal 1S and connector C-48 (without Bose^® type audio)

•  Audio amplifier

C

Possible cause

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

•  Body control module (BCM) power supply voltage or body ground malfunction

•  Open circuit in wiring harness between body control module (BCM) and connector C-49

•  JB No.2 malfunction

•  Body control module (BCM) malfunction

System wiring diagram

am3zzw00027582

Inspection item

•  Body control module (BCM) power supply voltage-related wiring harness and fuse

•  Body control module (BCM) body ground related wiring harness

•  Body control module (BCM) connector

•  Wiring harness between body control module (BCM) terminal 4R and connector C-49

•  Wiring harness between body control module (BCM) terminal 4Q and connector C-49

•  JB No.2

•  Body control module (BCM)