DETERMINING OPEN CIRCUIT LOCATION (CAN-BUS No.4) [TYPE-B (L.H.D.)]

id100270002900

Caution

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

•  If the malfunctioning part is detected in the control 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 control 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

•  Telematics communication unit power supply voltage or body ground malfunction

•  Open circuit in wiring harness between telematics communication unit and gateway unit (GWU)

•  Telematics communication unit malfunction

System wiring diagram

ac5wzw00014751

Inspection item

•  Telematics communication unit power supply voltage-related wiring harness and fuse

•  Telematics communication unit body ground related wiring harness

•  Telematics communication unit connector

•  Gateway unit (GWU) connector

•  Wiring harness between telematics communication unit terminal 1Q and gateway unit (GWU) terminal 3V

•  Wiring harness between telematics communication unit terminal 1S and gateway unit (GWU) terminal 3U

•  Telematics communication unit

B

Possible cause

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

•  Gateway unit (GWU) power supply voltage or body ground malfunction

•  Gateway unit (GWU) malfunction

System wiring diagram

ac5wzw00014752

Inspection item

•  Gateway unit (GWU) power supply voltage-related wiring harness and fuse

•  Gateway unit (GWU) body ground related wiring harness

•  Gateway unit (GWU)