M/T
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 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 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 (49P).
13. Check for continuity between A/C pressure sensor 3P connector terminal No. 2 and body ground.
Is there continuity?
YES -
Repair a short in the wire between the ECM/PCM (A17) and the A/C pressure sensor, then go to step 20.
NO -
Go to step 27.
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. 1 and ECM/PCM connector terminal A20.
Is there continuity?
YES -
Go to step 27.
NO -
Repair an open in the wire between the ECM/PCM (A20) 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 (M/T), then let the engine idle.
24. Turn the blower switch on.
25. Turn the A/C switch on.
26. 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.
27. Reconnect all connectors.
28. Update the ECM/PCM if it does not have the latest software ECM/PCM Update (M/T), or substitute a known-good ECM/PCM.
29. Start the engine, and let it idle.
30. Turn the blower switch on.
31. Turn the A/C switch on.
32. 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 29. 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.