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Home >> Suzuki >> 2011 >> Grand Vitara Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis >> Diagnostic Information and Procedures >> DTC P0532: A/C Refrigerant Pressure Sensor "A" Circuit Low; P0533: A/C Refrigerant Pressure Sensor "A" Circuit High >> DTC Troubleshooting
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DTC Troubleshooting

P0532, P0533 DIAGNOSIS PROCEDURE

Step Action YES NO
1  Was "Engine and Emission Control System Check" performed?  Go to Step 2. Go to ENGINE AND EMISSION CONTROL SYSTEM CHECK:J24B .
2  A/C refrigerant pressure sensor power supply circuit check 
  1. Turn OFF ignition switch and disconnect connector from A/C refrigerant pressure sensor.
  2. Check for proper terminal connection to A/C refrigerant pressure sensor connector.
  3. If connections are OK, turn ignition switch to ON position.
  4. Check that voltage between A/C refrigerant pressure sensor power supply circuit (A1) and ground circuit (A3) is 5 V.

Is it in good condition? 		 Go to Step 5. Go to Step 3.
3  A/C refrigerant pressure sensor power supply circuit check 
  1. Check that voltage between A/C refrigerant pressure sensor power supply circuit (A1) and vehicle body ground is 5 V.

Is it in good condition? 		 Repair or replace defective wire harness. If this DTC is detected again, substitute a known-good ECM and recheck. Go to Step 4.
4  A/C refrigerant pressure sensor power supply circuit check 
  1. Turn OFF ignition switch and disconnect connectors from ECM.
  2. Check for proper terminal connection to ECM connectors.
  3. If connections are OK, check that A/C refrigerant pressure sensor power supply circuit (A1) is as follows.
    • Wiring harness resistance of A/C refrigerant pressure sensor power supply circuit is less than 3 Ω.
    • Insulation resistance of A/C refrigerant pressure sensor power supply circuit is infinity between A/C refrigerant pressure sensor and vehicle body ground.
    • Insulation resistance of wire harness is infinity between A/C refrigerant pressure sensor power supply circuit terminal and each terminal at A/C refrigerant pressure sensor connector.
    • Circuit voltage of A/C refrigerant pressure sensor power supply circuit is 0 - 1 V with ignition switch in ON position.

Is it in good condition? 		 Substitute a known-good ECM and recheck. Repair or replace defective wire harness.
5  A/C refrigerant pressure sensor signal circuit check 
  1. Turn OFF ignition switch and disconnect connectors from ECM.
  2. Check for proper terminal connection to ECM connectors.
  3. If connections are OK, check that A/C refrigerant pressure sensor signal circuit (A2) is as follows.
    • Wiring harness resistance of A/C refrigerant pressure sensor signal circuit is less than 3 Ω.
    • Insulation resistance of A/C refrigerant pressure sensor signal circuit is infinity between A/C refrigerant pressure sensor and vehicle body ground.
    • Insulation resistance of wire harness is infinity between A/C refrigerant pressure sensor signal circuit terminal and each terminal at A/C refrigerant pressure sensor connector.
    • Circuit voltage of A/C refrigerant pressure sensor signal circuit is 0 - 1 V with ignition switch in ON position.

Is it in good condition? 		 Go to Step 6. Repair or replace defective wire harness.
6  A/C refrigerant pressure sensor check 
  1. Check A/C refrigerant pressure sensor, see A/C REFRIGERANT PRESSURE SENSOR AND ITS CIRCUIT INSPECTION .

Is it in good condition? 		 Substitute a known-good ECM and recheck. Replace A/C refrigerant pressure sensor.
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