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DTC Diagnosis Procedure
1.CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY
  1. Disconnect refrigerant pressure sensor harness connector.
  2. Turn ignition switch ON.
  3. Check the voltage between refrigerant pressure sensor harness connector and ground.
    +-Voltage
    (Approx.)
    Refrigerant pressure sensor
    ConnectorTerminal
    E331Ground5 V
Is the inspection result normal?
.
.
 
2.CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check the continuity between refrigerant pressure sensor harness connector and ECM harness connector.
+-Continuity
Refrigerant pressure sensorECM
ConnectorTerminalConnectorTerminal
E331F5279Existed
Is the inspection result normal?
Perform the trouble diagnosis for power supply circuit.
Repair or replace error-detected parts.
 
3.CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT
  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check the continuity between refrigerant pressure sensor harness connector and ECM harness connector.
    +-Continuity
    Refrigerant pressure sensorECM
    ConnectorTerminalConnectorTerminal
    E333F52105Existed
  4. Also check harness for short to power.
Is the inspection result normal?
.
Repair or replace error-detected parts.
 
4.CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT
  1. Check the continuity between refrigerant pressure sensor harness connector and ECM harness connector.
    +-Continuity
    Refrigerant pressure sensorECM
    ConnectorTerminalConnectorTerminal
    E332F5274Existed
  2. Also check harness for short to ground and to power.
Is the inspection result normal?
.
Repair or replace error-detected parts.
 
5.CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to Intermittent IncidentIntermittent Incident.
Is the inspection result normal?
Replace refrigerant pressure sensor. Refer to Removal and Installation.
Repair or replace error-detected parts.