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Home >> Mazda >> 2024 >> 3 Carbon Turbo, 4D Hatchback >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Symptom Troubleshooting - Heater, Ventilation & Air Conditioning (HVAC) >> Switch Operation Does Not Respond >> Diagnostic Procedure

Diagnostic Procedure

SWITCH OPERATION DOES NOT RESPOND DIAGNOSTIC PROCEDURE

Step Inspection Results Action
1 INSPECT WIRING HARNESS (INCLUDING CONNECTOR/TERMINAL) BETWEEN BATTERY AND CLIMATE CONTROL UNIT FOR MALFUNCTION  Yes Go to the next step.
No Repair or replace the malfunctioning location and perform the repair completion verification 1.
Repair completion verification 1 VERIFY IF MALFUNCTION CAUSE IS CORRECTED 
  • Do the related parts operate according to the switch operation of the climate control unit?
Yes Troubleshooting completed. (Explain repair contents to customer.)
No Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
(See MALFUNCTION DIAGNOSIS FLOW [CONTROLLER AREA NETWORK (CAN)] .)
If the CAN communication is normal, perform the diagnosis from Step 1.