Mazda RX-8 2004 Service Highlights page 539

2. PID/data monitor information for the ABS HU/CM and instrument cluster can be verified using an SST (WDS or
equivalent).
Module PID name (definition)
PCM_MSG
ABS HU/CM
(Missing message from the PCM)
PCM_MSG
(Missing message from the PCM)
Instrument
ABS_MSG
cluster
(Missing message from the ABS
HU/CM
PCM
: TWISTED PAIR
3. If there is a communication error between the ABS HU/CM and PCM, or between the instrument cluster and
PCM, even if the communication between the ABS HU/CM and the instrument cluster is normal, it is probable
that there is a malfunction in the PCM or PCM-related wiring harnesses.
End Of Sie
CONTROL SYSTEM
Condition
Not Present Communication error between ABS HU/CM and PCM
Communication error between instrument cluster and
Not Present
PCM
Normal communication between instrument cluster and
Present
ABS HU/CM
DLC-2
NO GOOD
GOOD
ABS HU/CU
Probable malfunction point
INSTRUMENT
CLUSTER
CHU0940S004
09–40
09–40–9