| DTC P0533: | A/C Pressure Sensor Circuit High Voltage |
| 1. | Start the engine, and let it idle. |
| 2. | Turn the blower switch on. |
| 3. | Turn the A/C switch on. |
| 4. | Check the A/C PRESSURE SENSOR in the DATA LIST with the HDS. Is there about 4.75 V or more? YES - Go to 5. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/C pressure sensor and the ECM/PCM.n |
| 5. | Turn the ignition switch OFF. |
| 6. | Disconnect the A/C pressure sensor 3P connector. |
| 7. | Connect A/C pressure sensor 3P connector terminals No. 2 and No. 3 with a jumper wire.
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| 8. | Turn the ignition switch ON (II). |
| 9. | Check the A/C PRESSURE SENSOR in the DATA LIST with the HDS. Is there about 4.75 V or more? YES - Go to 10. NO - Go to 22. |
| 10. | Turn the ignition switch OFF. |
| 11. | Remove the jumper wire from the A/C pressure sensor 3P connector. |
| 12. | Turn the ignition switch ON (II). |
| 13. | Measure voltage between A/C pressure sensor 3P connector terminal No. 1 and No. 3.
Is there about 5 V? YES - Go to 14. NO - Go to 18. |
| 14. | Turn the ignition switch OFF. |
| 15. | Jump the SCS line with the HDS. |
| 16. | Disconnect ECM/PCM connector A (44P). |
| 17. | Check for continuity between A/C pressure sensor 3P connector terminal No. 2 and ECM/PCM connector terminal A16.
Is there continuity? YES - Go to 32. NO - Repair open in the wire between the ECM/PCM (A16) and the A/C pressure sensor, then go to 24. |
| 18. | Turn the ignition switch OFF. |
| 19. | Jump the SCS line with the HDS. |
| 20. | Disconnect ECM/PCM connector A (44P). |
| 21. | Check for continuity between A/C pressure sensor 3P connector terminal No. 3 and ECM/PCM connector terminal A9.
Is there continuity? YES - Go to 32. NO - Repair open in the wire between the ECM/PCM (A9) and the A/C pressure sensor, then go to 24. |
| 22. | Turn the ignition switch OFF. |
| 23. | Replace the A/C pressure sensor. |
| 24. | Reconnect all connectors. |
| 25. | Turn the ignition switch ON (II). |
| 26. | Reset the ECM/PCM with the HDS. |
| 27. | Do the ECM/PCM idle learn procedure. |
| 28. | Start the engine, and let it idle. |
| 29. | Turn the blower switch on. |
| 30. | Turn the A/C switch on. |
| 31. | Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0533 is indicated, check for poor connections or loose terminals at the A/C pressure sensor and the ECM/PCM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - Troubleshooting is complete.n |
| 32. | Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM. |
| 33. | Start the engine, and let it idle. |
| 34. | Turn the blower switch on. |
| 35. | Turn the A/C switch on. |
| 36. | Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0533 is indicated, check for poor connections or loose terminals at the A/C pressure sensor and the ECM/PCM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM.n |