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Symptom:
P0533-A/C PRESSURE SENSOR HIGH
When Monitored and Set Condition:
P0533-A/C PRESSURE SENSOR HIGH
When Monitored: The engine running. The A/C relay energized.
Set Condition: The A/C pressure sensor signal at the PCM goes above 4.92 volts. One trip
Fault.
A/C PRESSURE SENSOR VOLTAGE ABOVE 4.6 VOLTS
(C18) A/C PRESSURE SIGNAL CIRCUIT SHORTED TO (K7) 5 VOLT SUPPLY CIRCUIT
(C18) A/C PRESSURE SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
A/C PRESSURE SENSOR INTERNAL FAILURE
(C18) A/C PRESSURE SIGNAL CIRCUIT OPEN
(K4) SENSOR GROUND CIRCUIT OPEN
PCM
TEST
1
NOTE: Ensure the A/C refrigerant System is properly charged per the
Service Information.
Start the engine.
With the DRBIII , read the A/C Pressure Sensor voltage.
Is the voltage above 4.6 volts?
Yes → Go To 2
→ Refer to the INTERMITTENT CONDITION symptom in the
No
2
Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between the (C18) A/C Pressure Signal circuit and the (K7)
5 Volt Supply circuit in the A/C Pressure Sensor harness connector.
Is the resistance below 5.0 ohms?
Yes → Repair the (C18) A/C Pressure Signal circuit for a short to the (K7)
→ Go To 3
No
POSSIBLE CAUSES
ACTION
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.
5 Volt Supply circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.
DRIVEABILITY - NGC
213
APPLICABILITY
All
All
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