DETERMINING OPEN CIRCUIT LOCATION (CAN-BUS No.2) [(US)]
DETERMINING OPEN CIRCUIT LOCATION (CAN-BUS No.2) [(US)]
SM2566447
id1002x1002100
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Caution
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• 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 [(US)].)• 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)
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Note
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• 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
Cross (×): Communication error-related DTC
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M-MDS display |
DTC |
DTC output pattern and malfunctioning location |
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|---|---|---|---|---|
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DTC output module |
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PCM
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U0101:00
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U0121:00
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×
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U0131:00
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U0140:00
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U0151:00
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U0155:00
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U0164:00
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U2121:00
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U212E:00
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U2131:00
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U2133:00
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DSC HU/CM
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U0100:00
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×
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U0101:00
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U0131:00
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U0140:00
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U0151:00
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U0155:00
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U0164:00
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U2121:00
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U212E:00
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U2131:00
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EPS control module
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U0100:00
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×
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U0121:00
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×
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U0140:00
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×
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U2121:00
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Vehicle control module (VCM)
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U0100:00
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×
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×
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U0101:00
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U0121:00
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×
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×
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U0126:00
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U0131:00
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U0140:00
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×
|
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U0151:00
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U0155:00
|
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U0156:00
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U0164:00
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U2120:00
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U2122:00
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U2123:00
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U2125:00
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U2126:00
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U212E:00
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U2131:00
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U2132:00
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U2133:00
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U2139:00
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U213A:00
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Body control module (BCM)
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U0100:00
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×
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U0101:00
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U0115:00
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×
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U0121:00
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×
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U0121:87
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×
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U0126:00
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U0131:00
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U0151:00
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U0155:00
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U0156:00
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U0158:00
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U0164:00
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U0182:00
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U2121:49
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U212A:00
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U212C:00
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U212D:00
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U212E:00
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U2131:00
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U2133:00
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U213A:00
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U213B:00
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U213C:00
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×
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×
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Connectivity master unit (CMU)
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U0140:00
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×
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Telematics communication unit
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U0140:00
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×
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U0151:00
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U0164:00
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U213C:00
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×
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×
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Adaptive front lighting system (AFS) control module
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U0122:87
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×
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×
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U0126:87
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U212A:87
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U212B:87
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×
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U212D:87
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Dash-electrical supply unit
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U0100:00
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×
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×
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U0101:00
|
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U0121:00
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×
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×
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U0151:00
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U212B:00
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×
|
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U212E:00
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U2131:00
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U2133:00
|
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U213A:00
|
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SAS control module
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U0140:00
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×
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U0155:00
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U0156:00
|
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TCM
|
U0100:00
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×
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×
|
|
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U0121:00
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×
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×
|
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U0131:00
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U0140:00
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×
|
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U0155:00
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U212C:00
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M-MDS display module
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Module displayed in red or blue
|
|||
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PCM
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×
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×
|
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DSC HU/CM
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×
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×
|
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Diagnostic result
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Possible cause and inspection item
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A
Possible cause
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• Connector terminal disconnection, poor contact, damage, deformation, corrosion• PCM power supply voltage or body ground malfunction• Open circuit in wiring harness between PCM and branch A• PCM malfunction
System wiring diagram
am3zzw00027543
|
Inspection item
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• PCM power supply voltage-related wiring harness and fuse• PCM body ground related wiring harness• PCM connector• Wiring harness between PCM terminal 2M and branch A• Wiring harness between PCM terminal 2N and branch A• PCM
B
Possible cause
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• Connector terminal disconnection, poor contact, damage, deformation, corrosion• DSC HU/CM power supply voltage or body ground malfunction• Open circuit in wiring harness between DSC HU/CM and branch A• DSC HU/CM malfunction
System wiring diagram
am3zzw00027544
|
Inspection item
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• DSC HU/CM power supply voltage-related wiring harness and fuse• DSC HU/CM body ground related wiring harness• DSC HU/CM connector• Wiring harness between DSC HU/CM terminal AQ and branch A• Wiring harness between DSC HU/CM terminal AN and branch A• DSC HU/CM
C
Possible cause
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• 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 branch A• Body control module (BCM) malfunction
System wiring diagram
am3zzw00027545
|
Inspection item
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• 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 2H and branch A• Wiring harness between body control module (BCM) terminal 2F and branch A• Body control module (BCM)