DTC Troubleshooting: P0533
DTC P0533: A/C Pressure Sensor Circuit High Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
P0533 A/C Pressure Sensor Circuit High 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
More than 4.75
V
    

Do the current condition(s) match the threshold?

     
YES
     
     
     
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 on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot.?
2.
Determine possible failure area (A/C pressure sensor, others):

Determine possible failure area (A/C pressure sensor, others)
?1.
Turn the vehicle to the OFF (LOCK) mode.

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

?3.
Connect terminals A and B with a jumper wire.
Terminal A
A/C pressure sensor 3P connector (female terminals) No. 1:
Terminal B
A/C pressure sensor 3P connector (female terminals) No. 2:


?4.
Turn the vehicle to the ON mode.

?5.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
A/C PRESSURE SENSOR
More than 4.75
V
    

Do the current condition(s) match the threshold?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
3.
Determine possible failure area (SG6 line, others):

Determine possible failure area (SG6 line, others)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Remove the jumper wire from the A/C pressure sensor 3P connector.

?3.
Turn the vehicle to the ON mode.

?4.
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 (female terminals) No. 1:
Test point 2
A/C pressure sensor 3P connector (female terminals) No. 3:


Is there about 5.0 V?

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
Go to step 5.
4.
Open wire check (PD SENSOR line):

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

?2.
Jump the SCS line with the HDS, and wait more than 1 minute.


?3.
Disconnect the following connector.
PCM connector A (50P)

?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 (50P): disconnected
Test point 1
A/C pressure sensor 3P connector (female terminals) No. 2:
Test point 2
PCM connector A (50P) No. 33


Is there continuity?

     
YES
     
     
     
The PD SENSOR wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM.?
     
NO
     
     
     
Repair an open in the PD SENSOR wire between the PCM (A33) and the A/C pressure sensor.?
5.
Open wire check (SG6 line):

Open wire check (SG6 line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Jump the SCS line with the HDS, and wait more than 1 minute.


?3.
Disconnect the following connector.
PCM connector E (80P)

?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 E (80P): disconnected
Test point 1
A/C pressure sensor 3P connector (female terminals) No. 1:
Test point 2
PCM connector E (80P) No. 45


Is there continuity?

     
YES
     
     
     
The SG6 wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM.?
     
NO
     
     
     
Repair an open in the SG6 wire between the PCM (E45) and the A/C pressure sensor.?