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Check code 31

WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
CHECK CODE 31 DIAGNOSTIC PROCEDURES

Check code 04 Door 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 next step.
OFF Verify that the voltage of instrument cluster terminal 2W is B+.
 
  • 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 the instrument cluster terminal 2W is 1.OV or less.
  • 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 (Key reminder switch-instrument cluster)
OFF Input signal to the instrument cluster is normal.
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