DTC Troubleshooting
DTC Troubleshooting: P0532, P0532
DTC P0532:
A/C Pressure Sensor Circuit Low Voltage
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information Initial Inspection and Diagnostic Overview.
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 0.24 V or less?
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. Turn the ignition switch to ON (II).
8. Check the A/C PRESSURE SENSOR in the DATA LIST with the HDS.
Is there about 0.24 V or less?
YES -
Go to step 10.
NO -
Go to step 9.
9. 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 18.
NO -
Go to step 14.
10. Turn the ignition switch to LOCK (0).
11. Jump the SCS line with the HDS.
12. Disconnect ECM/PCM connector A (44P).
13. Check for continuity between A/C pressure sensor 3P connector terminal No. 2 and body ground.
Is there continuity?
YES -
Repair short in the wire between the ECM/PCM (A16) and the A/C pressure sensor, then go to step 20.
NO -
Go to step 28.
14. Turn the ignition switch to LOCK (0).
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. 1 and ECM/PCM connector terminal A19.
Is there continuity?
YES -
Go to step 28.
NO -
Repair open in the wire between the ECM/PCM (A19) and the A/C pressure sensor, then go to step 20.
18. Turn the ignition switch to LOCK (0).
19. Replace the A/C pressure sensor Service and Repair.
20. Reconnect all connectors.
21. Turn the ignition switch to ON (II).
22. Reset the ECM/PCM with the HDS.
23. Do the ECM/PCM idle learn procedure ECM/PCM Idle Learn Procedure.
24. Start the engine, and let it idle.
25. Turn the blower switch on.
26. Turn the A/C switch on.
27. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0532 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.�
28. Reconnect all connectors.
29. Update the ECM/PCM if it does not have the latest software ECM/PCM Update, or substitute a known-good ECM/PCM.
30. Start the engine, and let it idle.
31. Turn the blower switch on.
32. Turn the A/C switch on.
33. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0532 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 30. 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.�