( TL19E2AK72100090532FAAT00 )

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. Replace the A/C pressure sensor.

1. Reconnect all connectors.

1. Turn the ignition switch to ON (II).

1. Reset the ECM/PCM with the HDS.

1. Do the ECM/PCM idle learn procedure.

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. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM.

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.■