A/T
DTC Troubleshooting: P0533, P0533
DTC P0533:
A/C Pressure Sensor Circuit High Voltage
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information How to Troubleshoot the Fuel and Emissions Systems.
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 step 5.
NO -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the A/C pressure sensor and the ECM/PCM.
5. Turn the ignition switch to LOCK (0).
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.
8. Turn the ignition switch to 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 step 10.
NO -
Go to step 22.
10. Turn the ignition switch to LOCK (0).
11. Remove the jumper wire from the A/C pressure sensor 3P connector.
12. Turn the ignition switch to ON (II).
13. Measure the voltage between A/C pressure sensor 3P connector terminals No. 1 and No. 3.
Is there about 5 V?
YES -
Go to step 14.
NO -
Go to step 18.
14. Turn the ignition switch to LOCK (0).
15. Jump the SCS line with the HDS.
16. Disconnect ECM/PCM connector A (49P).
17. Check for continuity between A/C pressure sensor 3P connector terminal No. 2 and ECM/PCM connector terminal A17.
Is there continuity?
YES -
Go to step 31.
NO -
Repair an open in the wire between the ECM/PCM (A17) and the A/C pressure sensor, then go to step 24.
18. Turn the ignition switch to LOCK (0).
19. Jump the SCS line with the HDS.
20. Disconnect ECM/PCM connector A (49P).
21. Check for continuity between A/C pressure sensor 3P connector terminal No. 3 and ECM/PCM connector terminal A10.
Is there continuity?
YES -
Go to step 31.
NO -
Repair an open in the wire between the ECM/PCM (A10) and the A/C pressure sensor, then go to step 24.
22. Turn the ignition switch to LOCK (0).
23. Replace the A/C pressure sensor Service and Repair.
24. Reconnect all connectors.
25. Turn the ignition switch to ON (II).
26. Reset the ECM/PCM with the HDS.
27. Do the ECM/PCM idle learn procedure ECM/PCM Idle Learn Procedure (M/T), then let the engine idle.
28. Turn the blower switch on.
29. Turn the A/C switch on.
30. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0533 indicated?
YES -
Check for poor connections or loose terminals at the A/C pressure sensor and the ECM/PCM, then go to step 1.
NO -
Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
31. Reconnect all connectors.
32. Update the ECM/PCM if it does not have the latest software ECM/PCM Update (M/T), 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 Pending or Confirmed DTCs with the HDS.
Is DTC P0533 indicated?
YES -
Check for poor connections or loose terminals at the A/C pressure sensor and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM, then go to step 33. If the ECM/PCM was substituted, go to step 1.
NO -
If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM Service and Repair. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.