Mazda RX-8 Manual page 2146

PCM
1. Check the display of DTC U0121 and/or U0155, using the SST (WDS or equivalent). (See DTC
TABLE [MULTIPLEX COMMUNICATION SYSTEM] .)
2. Referring to the following table, determine the malfunctioning part of the CAN system.
Communication status
Module ABS HU/CM
DSC HU/CM
Error
Error
PCM
OK
OK
OK
TCM Keyless control module Instrument cluster
Error Error
OK OK
Error OK
OK Error
OK OK
Malfunction location
•
Error
•
•
•
OK
•
•
OK
•
•
OK
•
•
•
Error
•
•
•
Wiring harness 1
Wiring harness 3
PCM
Wiring harness 5
ABS HU/CM
DSC HU/CM
Wiring harness 4
TCM
Wiring harness 7
Keyless control module
Wiring harness 8
Wiring harness 10
Wiring harness 12
Instrument cluster
(w) RX-8 Body
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