DTC Troubleshooting: 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.
  1. Start the engine, and let it idle.
  1. Turn the blower switch on.
  1. Turn the A/C switch on.
  1. Check the A/C PRESSURE SENSOR in the DATA LIST with the HDS.
Is there about 0.3 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.■
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the A/C pressure sensor 3P connector.
  1. Turn the ignition switch to ON (II).
  1. Check the A/C PRESSURE SENSOR in the DATA LIST with the HDS.
Is there about 0.3 V or less?
YES -
Go to Step 10 .
NO -
Go to Step 9 .
  1. 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 .
  1. Turn the ignition switch to LOCK (0).
  1. Jump the SCS line with the HDS.
  1. Disconnect ECM/PCM connector A (44P).
  1. 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 .
  1. Turn the ignition switch to LOCK (0).
  1. Jump the SCS line with the HDS.
  1. Disconnect ECM/PCM connector A (44P).
  1. Check for continuity between A/C pressure sensor 3P connector terminal No. 1 and ECM/PCM connector terminal A19.
Is there continuity?
YES -
Repair open in the wire between the ECM/PCM (A19) and the A/C pressure sensor, then go to Step 20 .
NO -
Go to Step 28 .
  1. Turn the ignition switch to LOCK (0).
  1. Reconnect all connectors.
  1. Turn the ignition switch to ON (II).
  1. Reset the ECM/PCM with the HDS.
  1. Start the engine, and let it idle.
  1. Turn the blower switch on.
  1. Turn the A/C switch on.
  1. Check for Temporary DTCs or 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 Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.■
  1. Reconnect all connectors.
  1. Start the engine, and let it idle.
  1. Turn the blower switch on.
  1. Turn the A/C switch on.
  1. Check for Temporary DTCs or 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. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.■