FixVault

DTC B1317/B1318 [Advanced Keyless System]: Notes

WARNING: This page is about a different car, the 2007 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
DTC B1317/B1318 POSSIBLE CAUSE TABLE

DTC B1317 Keyless control module power supply voltage increases (16.1 V or more)
B1318 Keyless control module power supply voltage decreases (less than 9 V)
DETECTION CONDITION 
  • When the keyless control module power supply voltage is not within 9-16 V. 
POSSIBLE CAUSE 
  • Open or short circuit in wiring harness between battery and keyless control module
  • Battery malfunction
  • Keyless control module malfunction
G04323302Courtesy of MAZDA MOTORS CORP.