Mazda Mazda6 Workshop Manual Supplement page 818

Self-Malfunction Diagnostic Function
• The self-malfunction diagnostic function determines that there is a malfunction, and outputs a signal, as a DTC,
to the DLC-2. The DTC can be read out using an SST (WDS or equivalent).
DTC table
DTC
U0073 CAN system communication error
U0100 Communication error to PCM
U0101 Communication error to TCM
U0121 Communication error to ABS (ABS/TCS) HU/CM or DSC HU/CM
U0155 Communication error to instrument cluster
U1900 CAN system communication error
U2511 Communication error to 4WD control module
U2516 CAN system wiring harness open and short circuit
PID/Data Monitoring Function
• The PID/data monitoring function is used to freely select and read out, in real time, the monitored items for the
input/output signals of the TCM, ABS (ABS/TCS) HU/CM, DSC HU/CM and instrument cluster.
• An SST (WDS or equivalent) is used to read out the PID/data monitor information.
PID name
Condition
(definition)
Present
PCM_MSG
(Missing message
Not Present
from the PCM)
Present
TCM_MSG
(Missing message
Not Present
from the TCM)
ABS_MSG
Present
(Missing message
from the ABS
(ABS/TCS) HU/
CM or DSC HU/
Not Present
CM)
AWD_MSG Present
(Missing message
from the 4WD
Not Present
control module)
IC_MSG
Present
(Missing message
from the
instrument
Not Present
cluster)
End Of Sie
MULTIPLEX COMMUNICATION SYSTEM
Malfunction location
Specification
Circuit in the PCM is normal
Circuit in the PCM is abnormal
Circuit in the TCM is normal
Circuit in the TCM is abnormal
Circuit in the ABS (ABS/TCS)
HU/CM or DSC HU/CM is
normal
Circuit in the ABS (ABS/TCS)
HU/CM or DSC HU/CM is
abnormal
Circuit in the 4WD control
module is normal
Circuit in the 4WD control
module is abnormal
Circuit in the instrument cluster
is normal
Circuit in the instrument cluster
is abnormal
Related module
• PCM
• TCM
• TCM
• 4WD control module
• PCM
• 4WD control module
PCM
• ABS (ABS/TCS) HU/CM (with ABS (ABS/
TCS))
• DSC HU/CM (with DSC)
• Instrument cluster
• ABS (ABS/TCS) HU/CM (with ABS (ABS/
TCS))
• DSC HU/CM (with DSC)
• ABS (ABS/TCS) HU/CM (with ABS (ABS/
TCS))
• DSC HU/CM (with DSC)
• Instrument cluster
Related module
• TCM
• ABS (ABS/TCS)
HU/CM or DSC
HU/CM
• Instrument cluster
• ABS (ABS/TCS)
HU/CM or DSC
HU/CM
• Instrument cluster
• TCM: 2J, 2M
• ABS (ABS/TCS) HU/CM
• TCM
(with ABS (ABS/TCS)): O,
• Instrument cluster
R
• DSC HU/CM (with DSC):
AF, AG
• Instrument cluster: 2W, 2X
• TCM
• ABS (ABS/TCS)
HU/CM or DSC
HU/CM
• Instrument cluster
• TCM
• ABS (ABS/TCS)
HU/CM or DSC
HU/CM
Terminal
T
T–7