Mazda RX-8 Manual page 1542

DTC C2778 [DYNAMIC STABILITY CONTROL]
DTC C2778
DETECTION
CONDITION
POSSIBLE CAUSE
Steering angle sensor (abnormal battery voltage)
The steering angle sensor detects an abnormality (open circuit) in the battery
•
power supply (constant power supply).
BTN 30 A fuse malfunction
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DSC 7.5A fuse malfunction
•
Open circuit in the wiring harness between the battery and steering angle
•
sensor terminal B
Poor connection at connectors (female terminal)
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(w) RX8 - Brakes
Page 128