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Home >> Suzuki >> 2012 >> SX4 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 75 (Air Conditioning System - Auto A/C) >> Diagnostic Information and Procedures >> DTC B1546: A/C Refrigerant Pressure Malfunction >> DTC Troubleshooting
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DTC Troubleshooting

WARNING: This page is about a different car, the 2011 Suzuki SX4. However, it is still accessible from the selected car via links, so may be relevant.
B1546: SYMPTOM TROUBLESHOOTING REFERENCE CHART

Step Action YES NO
1  Was "Air Conditioning System Check" performed?  Go to Step 2. Go to AIR CONDITIONING SYSTEM CHECK: AUTO A/C .
2  DTC check 
  1. Connect scan tool to DLC with ignition switch turned OFF.
  2. Turn ignition switch to ON position and check DTC in BCM.

Is DTC B1141 or B1142 (BCM) detected? 		 Go to applicable DTC diag. flow. Go to Step 3.
3  DTC check 
Check DTC in ECM.
Is DTC P0532 or P0533 detected? 		 Go to applicable DTC diag. flow. Go to Step 4.
4  A/C refrigerant pressure and outside air temperature data check 
  1. Start engine and select "Scan Tool Data" mode on scan tool.
  2. Check "Refrigerant Pressure" and "Outside Air Temp" displayed on scan tool.

Are values of A/C refrigerant pressure sensor displayed in "Scan Tool Data" and outside air temperature sensor displayed in "Scan Tool Data" within specified ranges? 		 Substitute a known-good HVAC control module and recheck. Check the amount of refrigerant and system for leaks.
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