Mazda RX-8 Manual page 1502

DTC B1318 [ABS]
CAUTION:
If the battery voltage drops during the inspection, B1318 will be output as a current malfunction and the
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proper diagnosis cannot be made. Be careful not to let the battery voltage drop.
DTC B1318
DETECTION
CONDITION
POSSIBLE CAUSE
Power supply
The voltage at ABS HU/CM terminal Z is approx. 10 V or less .
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ENGINE 15 A fuse malfunction
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Open circuit or short to ground in the wiring harness between the ABS
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HU/CM terminal Z and the battery
Open circuit or faulty ground in the wiring harness between the ABS HU/CM
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terminal AC and the body ground
Battery deterioration
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Generator malfunction
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Poor connection at connectors (female terminal)
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(w) RX8 - Brakes
Page 88