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Home >> Mazda >> 2007 >> 6 Mazdaspeed >> Repair and Diagnosis >> External Pages >> Different car >> Section 709 (Instrumentation/Driver Info) >> Information Display Input/Output Check Mode >> Check Code Inspection >> Check code 04

Check code 04

WARNING: This page is about a different car, the 2008 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
CHECK CODE 04 CHART

Check code 04 TNS relay ON/OFF signal
STEP INSPECTION CONDITION DISPLAY ACTION
1 Turn the headlight switch to the TNS position. (TNS relay ON) ON Go to the next step.
OFF Verify that the voltage of information display terminal C is B+.
  • If the voltage is as specified, replace the information display.
  • If the voltage is not as specified, inspect the following parts:
    • TNS relay
    • Wiring harness (Battery-TNS relay-information display)
2 Turn the headlight switch off. (TNS relay OFF) ON Verify that the voltage of the information display terminal C is 1.0 V or less. 
  • If the voltage is as specified, replace the information display.
  • If the voltage is not as specified, inspect the following parts:
    • TNS relay
    • Wiring harness (TNS relay-information display)
OFF Input signal to the information display is normal.
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