Mazda RX-8 2004 Service Highlights page 537

DTC table
DTC
U0073 CAN system communication error
U0100 Communication error to PCM
U0101 Communication error to TCM
U0121 Communication error to ABS HU/CM
U0155 Communication error to instrument cluster
U0167 Communication error to keyless control module
U0516 CAN bus communication error
U2510
Communication error to PCM
U1147
U1900 CAN system communication error
U2516 CAN system wiring harness open or 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 ABS HU/CM and instrument cluster.
• An SST (WDS or equivalent) is used to read out the PID/data monitor information.
PID name (definition)
ABS_MSG
(Missing message from the
ABS HU/CM or DSC HU/
CM)
TCM_MSG
(Missing message from the
TCM)
EPS_MSG
(Missing message from the
EPS control module)
PCM_MSG
(Missing message from the
PCM)
TPM_MSG
(Missing message from the
TPMS control module)
Narrowing down malfunction locations
• The on-board diagnostic function, by verifying the detected DTC and PID/data monitor information from each
module, can narrow down a CAN system malfunction location. Refer to the Self-malfunction diagnostic
Function and PID/data monitoring function for detailed information regarding DTCs and the PID/data monitor.
(See 09–40–6 Self-malfunction diagnostic function.) (See 09–40–7 PID/data monitoring function.)
CONTROL SYSTEM
Malfunction location
Condition Specification
Circuit in the ABS HU/CM is
Present
normal
Circuit in the ABS HU/CM is
Not Present
disable
Present Circuit in the TCM is normal
Not Present Circuit in the TCM is disable
Circuit in the EPS control
Present
module is normal
Circuit in the EPS control
Not Present
module is disable
Present Circuit in the PCM is normal
Not Present Circuit in the PCM is disable
Circuit in the TPMS control
Present
module is normal
Circuit in the TPMS control
Not Present
module is disable
Module outputting DTC
• PCM
• TCM
• EPS control module
• Keyless control module
TCM
PCM
PCM
TPMS control module
Keyless control module
• ABS HU/CM
• DSC HU/CM
• EPS control module
• Steering angle sensor
• Keyless control module
• TPMS control module
• Instrument cluster
• ABS HU/CM
• DSC HU/CM
• Steering angle sensor
• Instrument cluster
PID monitor
Terminal
module
• ABS HU/CM: O, R
• DSC HU/CM: H, I
• Instrument cluster:
1J, 1L
• TCM: 1V, 1Y
• Instrument cluster:
1J, 1L
• EPS control
module: 2K, 2M
Instrument cluster
• Instrument cluster:
1J, 1L
• PCM: 4S, 4V
• Instrument cluster:
1J, 1L
• TPMS control
module: E, G
• Instrument cluster:
1J, 1L
09–40
09–40–7