DTC Troubleshooting

DTC TROUBLESHOOTING CHART

Step	Action	YES	NO
1	DTC check Connect scan tool to DLC with ignition switch turned OFF. Turn ON ignition switch and clear DTC. Ignition switch turned OFF position. Turn ON ignition switch and check DTC. Is there DTC B1546?	Go to Step 2.	Confirm that vehicle A/C system condition referring A/C System Performance Inspection , and recheck DTC.
2	Refrigerant pressure check Connect scan tool to DLC with ignition switch OFF. Ignition switch ON turned ON position. Check refrigerant pressure displayed on scan tool. Is it 340 kPa or more?	Go to Step 3.	Charge refrigerant and Confirm that vehicle A/C system condition referring to A/C SYSTEM PERFORMANCE INSPECTION . And then recheck DTC.
3	A/C system check Confirm that vehicle A/C system condition referring to A/C SYSTEM PERFORMANCE INSPECTION . Is A/C system in good condition?	Go to Step 4.	Repair and/or replace.
4	Refrigerant pressure sensor check Check refrigerant pressure sensor referring to A/C REFRIGERANT PRESSURE SENSOR AND ITS CIRCUIT INSPECTION . Are refrigerant pressure sensor and/or its circuit in good condition?	Go to Step 5.	Repair circuit and/or replace refrigerant pressure sensor.
5	Outside temperature sensor check Check outside temperature sensor referring to OUTSIDE AIR TEMPERATURE SENSOR INSPECTION (IF EQUIPPED) . Is outside temperature sensor in good condition?	Replace HVAC control module.	Replace outside temperature sensor.