Chrysler 300M 2002 Service Manual page 2650

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.
INTERMITTENT CONDITION
A/C PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO 5 VOLT SUPPLY CIRCUIT
A/C PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
A/C PRESSURE SENSOR INTERNAL FAILURE
A/C PRESSURE SENSOR SIGNAL CIRCUIT OPEN
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
No
2 Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between the A/C Pressure Sensor Signal circuit and the 5 Volt
Supply circuit in the A/C Pressure Sensor harness connector.
Is the resistance below 5.0 ohms?
Yes → Repair the A/C Pressure Sensor Signal circuit for a short to the 5
No
POSSIBLE CAUSES
ACTION
→ Go To 8
Volt Supply circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
→ Go To 3
DRIVEABILITY - NGC
221
APPLICABILITY
All
All