Mazda RX8 Workshop Manual page 394

10
20
30
40
50
70
80
4. Verify that the speedometer reading is within the range indicated in the table.
If the speedometer does not move or the indication is not within the allowable range, inspect the
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ABS HU/CM (vehicles with ABS), DSC HU/CM (vehicles with DSC) and related wiring
harnesses.
If the ABS HU/CM (vehicles with ABS), DSC HU/CM (vehicles with DSC) and related
wiring harnesses are normal, replace the instrument cluster.
Tachometer
Using the input/output check mode
1. Inspect the tachometer by setting it to check code 13 of the input/output check mode.(See
INSTRUMENT CLUSTER INPUT/OUTPUT CHECK MODE .)
Using WDS or external diagnostic equipment
CAUTION:
If the engine speed exceeds the allowable range, the engine could be damaged.Therefore, when
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inspecting the tachometer, do not allow the engine speed to exceed the allowable range indication on the
tachometer.
1. Connect the WDS or external diagnostic equipment to the diagnostic connector 2 (16-pin).
2. Compare the data monitor item (RPM) with the tachometer indication.
If the tachometer does not operate properly, inspect the PCM and related wiring harnesses.
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If the PCM and related harnesses do not have any malfunction, replace the instrument
cluster.
Fuel gauge
911
1921
2931
3941
4951
6971
7882
(w) RX-8 Body
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