Mazda RX-8 2004 - Speedometer Control Construction;Operation; Speedometer Control Outline; Tachometer Control Construction;Operation; Tachometer Control Outline

INSTRUMENTATION/DRIVER INFO.
09–22–10
SPEEDOMETER CONTROL OUTLINE
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• The vehicle speed signal is output from the ABS HU/CM or DSC HU/CM to the microcomputer in the
instrument cluster.
End Of Sie
SPEEDOMETER CONTROL CONSTRUCTION/OPERATION
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System Wiring Diagram
Operation
• The vehicle speed signal sent from the ABS HU/CM or DSC HU/CM via the CAN system is input to the
microcomputer in the instrument cluster. The microcomputer calculates the current vehicle speed based on the
vehicle speed signal, and sends an output signal to the speedometer.
End Of Sie
TACHOMETER CONTROL OUTLINE
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• The engine speed signal is output from the PCM to the microcomputer in the instrument cluster.
End Of Sie
TACHOMETER CONTROL CONSTRUCTION/OPERATION
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System Wiring Diagram
Operation
• The engine speed signal sent from the PCM via the CAN system is input to the microcomputer in the
instrument cluster. The microcomputer calculates the current engine speed based on the engine speed signal,
and sends an output signal to the tachometer.
End Of Sie
IG1
B+
1G
1E
1L1J
1C
CAN
CONTROL
CIRCUIT
ABS HU/CM or
DSC HU/CM
INSTRUMENT
CLUSTER
MICROCOMPUTER
SPEEDOMETER
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IG1
B+
1G
1E
1L1J
1C
CAN
CONTROL
CIRCUIT
PCM
INSTRUMENT
CLUSTER
MICROCOMPUTER
TACHOMETER
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