DTC B1318 [Auto Light/Wiper Control Module]: Notes
DTC B1318 - DETECTION CONDITION POSSIBLE CAUSE CHART
| DTC B1318 |
Battery voltage low |
| DETECTION CONDITION |
Input voltage from the battery is excessively low |
| POSSIBLE CAUSE |
- Open circuit in wiring harness between auto light/wiper control module terminal 1E and battery
- Open circuit in wiring harness between auto light/wiper control module terminal 2C and battery
- Short to GND in wiring harness between auto light/wiper control module terminal 1E and battery
- Short to GND in wiring harness between auto light/wiper control module terminal 2C and battery
- Battery malfunction
- Generator malfunction
- Auto light/wiper control module malfunction
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 Courtesy of MAZDA MOTORS CORP.
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