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.

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.?
2.
Determine possible failure area (PD SENSOR line, others):

Determine possible failure area (PD SENSOR line, others)
?1.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connector.

?3.
Turn the ignition switch to ON (II), or press the engine start/stop button to select 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
IG ON (II) or ON mode
 
A/C pressure sensor 3P connector: disconnected
Test circuit
VCC6, SG6
Test point 1
A/C pressure sensor 3P connector No. 1 (BLU)
Test point 2
A/C pressure sensor 3P connector No. 3 (BRN)


Is there about 5.0 V?

     
YES
     
     
     
     
NO
     
     
     
Go to step 4.
4.
Open wire check (VCC6 line):

Open wire check (VCC6 line)
?1.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.
Jump the SCS line with the HDS.


?3.
Disconnect the following connector.

?4.
Check for continuity between test points 1 and 2.
Test condition
IG LOCK (0) or OFF mode
 
A/C pressure sensor 3P connector: disconnected
 
PCM connector A (51P): disconnected
Test circuit
VCC6
Test point 1
A/C pressure sensor 3P connector No. 3 (BRN)
Test point 2
PCM connector A (51P) No. 29 (BRN)


Is there continuity?

     
YES
     
     
     
The VCC6 wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then do the repair verification.
     
NO
     
     
     
Repair an open in the VCC6 wire between the PCM (A29) and the A/C pressure sensor, then do the repair verification.
5.
Shorted wire check (PD SENSOR line):

Shorted wire check (PD SENSOR line)
?1.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.
Jump the SCS line with the HDS.


?3.
Disconnect the following connector.

?4.
Check for continuity between test points 1 and 2.
Test condition
IG LOCK (0) or OFF mode
 
A/C pressure sensor 3P connector: disconnected
 
PCM connector A (51P): disconnected
Test circuit
PD SENSOR
Test point 1
A/C pressure sensor 3P connector No. 2 (RED)
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, then do the repair verification.
     
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 do the repair verification.
Repair verification:

?1.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.
Reconnect all connectors.

?3.
Exit the SCS mode with the HDS.


?4.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?5.
Reset the PCM with the HDS.


?6.
Do the PCM idle learn procedure.

?7.
Start the engine, and let it idle.

?8.
Turn the blower switch on.

?9.
Turn the A/C switch on.

?10.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P0532 A/C Pressure Sensor Circuit Low Voltage
      


Is DTC P0532 indicated?

     
YES
     
     
     
Check for poor connections or loose terminals at the A/C pressure sensor and the PCM. If the PCM was updated, substitute a known-good PCM, then recheck. If the PCM was substituted, go to step 1.
     
NO
     
     
     
Troubleshooting is complete. If the PCM was substituted, replace the original PCM. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.?