Mazda RX-8 Workshop Manual page 3277

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2011 - RX-8 - Body and Accessories
NO. 8 TACHOMETER INDICATION IS DEFECTIVE [INSTRUMENT CLUSTER]
8 Tachometer indication is defective
POSSIBLE CAUSE
Diagnostic procedure
STEP
1 Start the engine.
2 Does the speedometer, the water temperature
gauge, operate normally?
3 Start the instrument cluster input/output check
mode.
Inspect the tachometer using the check code 13.
Is the tachometer normal?
PCM malfunction
Instrument cluster malfunction
Short circuit in wiring harness between CAN-L, CAN-H and GND
Open circuit in CAN wiring harness (CAN-L, CAN-H)
CAN wiring harness (CAN-L, CAN-H) short each other
Connector or pin malfunction
INSPECTION
Does the tachometer needle
move smoothly?
Does the tachometer needle
indicate correct engine speed?
ACTION
YesTroubleshooting completed.
No Go to the next step.
YesGo to the next step.
No Go to Step 5.
YesInspect the PCM or connectors.
No Replace the instrument cluster.