DTC Troubleshooting: P0532
DTC P0532: A/C Pressure Sensor Circuit Low Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P0532 A/C Pressure Sensor Circuit Low Voltage
      

1.
Problem verification:

Problem verification
?1.
Start the engine, and let it idle.

?2.
Turn the blower switch on.

?3.
Turn the A/C switch on.

?4.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
A/C PRESSURE SENSOR
Less than 0.24
V
    

Do the current condition(s) match the threshold?

     
YES
     
     
     
The failure is duplicated. Go to step 2.
     
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 PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.?
2.
Determine possible failure area (PD SENSOR line, others):

Determine possible failure area (PD SENSOR line, others)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
A/C pressure sensor 3P connector

?3.
Turn the vehicle to the ON mode.

?4.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
A/C PRESSURE SENSOR
Less than 0.24
V
    

Do the current condition(s) match the threshold?

     
YES
     
     
     
Go to step 5.
     
NO
     
     
     
Go to step 3.
3.
Determine possible failure area (A/C pressure sensor, others):

Determine possible failure area (A/C pressure sensor, others)
?1.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
A/C pressure sensor 3P connector: disconnected
Test point 1
A/C pressure sensor 3P connector No. 1
Test point 2
A/C pressure sensor 3P connector No. 3


Is there about 5.0 V?

     
YES
     
     
     
     
NO
     
     
     
Go to step 4.
4.
Open wire check (VCC5 line):

Open wire check (VCC5 line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Jump the SCS line with the HDS.


?3.
Disconnect the following connector.
PCM connector A (51P)

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
A/C pressure sensor 3P connector: disconnected
 
PCM connector A (51P): disconnected
Test point 1
A/C pressure sensor 3P connector No. 3
Test point 2
PCM connector A (51P) No. 40


Is there continuity?

     
YES
     
     
     
The VCC5 wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If DTC P0532 goes away and the PCM was updated, troubleshooting is complete. If DTC P0532 goes away and the PCM was substituted, replace the original PCM.?
     
NO
     
     
     
Repair an open in the VCC5 wire between the PCM (A40) and the A/C pressure sensor.?
5.
Shorted wire check (PD SENSOR line):

Shorted wire check (PD SENSOR line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Jump the SCS line with the HDS.


?3.
Disconnect the following connector.
PCM connector A (51P)

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
A/C pressure sensor 3P connector: disconnected
 
PCM connector A (51P): disconnected
Test point 1
A/C pressure sensor 3P connector No. 2
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short in the PD SENSOR wire between the PCM (A41) and the A/C pressure sensor.?
     
NO
     
     
     
The PD SENSOR wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If DTC P0532 goes away and the PCM was updated, troubleshooting is complete. If DTC P0532 goes away and the PCM was substituted, replace the original PCM.?