Check code 31

2013 Mazda MX-5 Miata Grand Touring, Automatic TransSECTION Check code 31
CODE INSPECTION CONDITION CHART

Check code 31 Key reminder switch ON/OFF signal
STEP INSPECTION CONDITION DISPLAY ACTION
1 Remove the key from the steering lock, then reinsert the key into the steering lock after selecting check code 31. (The key reminder switch is on). on Go to the next step.
oFF Verify that the voltage of instrument cluster terminal 2W is B+Β  .
  • If the voltage is as specified, replace the instrument cluster.
  • If the voltage is not as specified, inspect the following parts:
    • Key reminder switch
    • Wiring harness (Battery-Key reminder switch- Instrument cluster)
2 Remove the key from the steering lock. (The key reminder switch is off). on Verify that the voltage of instrument cluster terminal 2W is 1.0 V or less.Β 
  • If the voltage is as specified, replace the instrument cluster.
  • If the voltage is not as specified, inspect the following parts:
    • Key reminder switch
    • Wiring harness (Battery-Key reminder switch- Instrument cluster)
oFF Input signal to the instrument cluster is normal.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.