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Home >> Suzuki >> 2013 >> Kizashi Base, Standard Trans >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning System >> Diagnostic Information and Procedures >> DTC B1502-H: Inside Air Temperature Sensor and/or Its Circuit Malfunction >> DTC Troubleshooting
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DTC Troubleshooting

DTC TROUBLESHOOTING CHART

Step Action YES NO
1  Scan tool parameter check 
  1. Check "Cabin Temperature" using "Data list" mode on SUZUKI scan tool, see SCAN TOOL DATA .

Is temperature below -40 °C (-40 °F)? 		 Go to Step 2. Intermittent trouble.
2  Inside air temperature sensor signal circuit check 
  1. Disconnect inside air temperature sensor connector.
  2. Connect "LT GRN/RED" and "LT GRN/BLK" wire terminals of inside air temperature sensor connector using service wire.
  3. Check "Cabin Temperature" using "Data list" mode on SUZUKI scan tool. See SCAN TOOL DATA 

Is temperature below -40 °C (-40 °F)? 		 Go to Step 3. Replace inside air temperature sensor. Refer to INSIDE AIR TEMPERATURE SENSOR REMOVAL AND INSTALLATION 
3  Inside air temperature sensor signal circuit check 
  1. Connect "LT GRN/RED" and "LT GRN/BLK" wire terminals of "G20" connector using service wire.
  2. Check "Cabin Temperature" using "Data list" mode on SUZUKI scan tool. See SCAN TOOL DATA 

Is temperature below -40 °C (-40 °F)? 		 Replace HVAC control module and recheck DTC. Refer to HVAC CONTROL MODULE REMOVAL AND INSTALLATION  "LT GRN/RED" or "LT GRN/BLK" wire open.
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