P0533

DTC P0532 / P0533

DTC Detecting Condition and Trouble Area






Wiring Diagram










DTC Confirmation Procedure

1) Start engine and operate A/C for 10 sec.

DTC Troubleshooting



1.
Was "Engine and Emission Control System Check" performed?
YES
Go to Step 2.
NO
Go to Engine and Emission Control System Check.

2. A/C refrigerant pressure sensor power supply circuit check

Turn OFF ignition switch and disconnect connector from A/C refrigerant pressure sensor.
Check for proper terminal connection to A/C refrigerant pressure sensor connector.
If connections are OK, turn ignition switch to ON position.
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?
YES
Go to Step 5.
NO
Go to Step 3.

3. A/C refrigerant pressure sensor power supply circuit check

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?
YES
Repair or replace defective wire harness.
If this DTC is detected again, substitute a known-good ECM and recheck.
NO
Go to Step 4.

4. A/C refrigerant pressure sensor power supply circuit check

Turn OFF ignition switch and disconnect connectors from ECM.
Check for proper terminal connection to ECM connectors.
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 ohms.
- 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?
YES
Substitute a known-good ECM and recheck.
NO
Repair or replace defective wire harness.

5. A/C refrigerant pressure sensor signal circuit check

Turn OFF ignition switch and disconnect connectors from ECM.
Check for proper terminal connection to ECM connectors.
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 ohms.
- 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?
YES
Go to Step 6.
NO
Repair or replace defective wire harness.

6. A/C refrigerant pressure sensor check

Check A/C refrigerant pressure sensor.
- Manual A/C model: A/C Refrigerant Pressure Sensor and its Circuit Inspection
- Auto A/C model: A/C Refrigerant Pressure Sensor and its Circuit Inspection

Is it in good condition?
YES
Substitute a known-good ECM and recheck.
NO
Replace A/C refrigerant pressure sensor.