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HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 387 (INSTRUMENTATION/DRIVER INFO)INSTRUMENT CLUSTER INPUT/OUTPUT CHECK MODEINSPECTION OF CHECK CODESCHECK CODE 31DIAGNOSTIC PROCEDURE
2008 Mazda 6 s Sport, 4D Hatchback, Standard

Diagnostic procedure

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Diagnostic procedure
WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
CHECK CODE 31 DIAGNOSTIC PROCEDURE

STEP INSPECTION INDICATION ACTION
1 Remove key from steering lock and then insert key into steering lock after selecting check code 31. (Key reminder switch on.) on Go to next step.
off Measure voltage at instrument cluster terminal 2B.
Is voltage B+  ?
  • If as specified, replace instrument cluster.
  • If not as specified, replace following parts.
    • Key reminder switch
    • Wiring harness (Battery-key reminder switch-instrument cluster)
2 Remove key from steering lock (Key reminder switch off.) on Measure voltage at instrument cluster terminal 2B.
Is voltage 0 V  ?
  • If as specified, replace instrument cluster.
  • If not as specified, inspect following parts.
    • Key reminder switch
    • Wiring harness (Battery-key reminder switch-instrument cluster)
off Input signal to instrument cluster is okay.
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:

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