Mazda RX-8 Workshop Manual page 2372

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2011 - RX-8 - Steering
DTC B1318
DTC B1318
DETECTION
CONDITION
POSSIBLE
CAUSE
Battery power supply
Voltage of 10 V or less or 16 V or more detected by EPS control
module internal ignition voltage observation.
Battery malfunction
Generator malfunction
Poor connection of EPS control module connector
EPS control module connector or terminal malfunction
Short to ground in wiring harness between EPS control module terminal
2P and battery
EPS control module malfunction