LED Illumination Inspection

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
Remove the LDWS switch. (See LDWS SWITCH REMOVAL/INSTALLATION .)
Apply battery positive voltage to LDWS switch terminal J, and connect terminal I to ground.
Verify that the LED illuminates.
- If there is any malfunction, replace the cluster switch. (See CLUSTER SWITCH REMOVAL/INSTALLATION .)
  
  Fig 1: Applying Battery Positive Voltage To Cluster Switch Terminals
  Courtesy of MAZDA MOTORS CORP.