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.
Turn the vehicle to the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Start the engine, and let it idle.

?4.
Turn the blower switch on.

?5.
Turn the A/C switch on.

?6.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
P0533 A/C Pressure Sensor Circuit High Voltage
    

Is DTC P0533 indicated?

     
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 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.
Clear the DTC with the HDS.


?6.
Start the engine, and let it idle.

?7.
Turn the blower switch on.

?8.
Turn the A/C switch on.

?9.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
P0533 A/C Pressure Sensor Circuit High Voltage
    

Is DTC P0533 indicated?

     
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 No. 2 (58P)

?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 No. 2 (58P): disconnected
Test point 1
A/C pressure sensor 3P connector (female terminals) No. 2:
Test point 2
PCM connector No. 2 (58P) No. 56


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, then recheck. If DTC P0533 goes away and the PCM was substituted, replace the original PCM.?
     
NO
     
     
     
Repair an open in the PD SENSOR wire between PCM connector No. 2 terminal No. 56 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 No. 2 (58P)

?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 No. 2 (58P): disconnected
Test point 1
A/C pressure sensor 3P connector (female terminals) No. 1:
Test point 2
PCM connector No. 2 (58P) No. 32


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, then recheck. If DTC P0533 goes away and the PCM was substituted, replace the original PCM.?
     
NO
     
     
     
Repair an open in the SG6 wire between PCM connector No. 2 terminal No. 32 and the A/C pressure sensor.?