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P0532-00 Refrigerant Pressure Sensor Ground Fault
 
 
cautionBefore replacing the ECU, ensure that the CAN bus lines is normal.
 
 
MONITOR EXECUTION
Continuous
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
  • Not applicable
Sensor (The sensor below is determined to be normal)
    • Battery inlet refrigerant temperature sensor
    • Drive battery temperature sensor
    • Intake air temperature sensor
 
 
DTC SET CONDITIONS
Logic Flow Chart
 
 
TROUBLE JUDGMENT
Check Condition
  • The heater PHEV A/C amp. power supply voltage is between 10 and 16 volts.
  • Battery inlet refrigerant temperature is more than 4°C (39°F).
  • Drive battery temperature minimum value is more than 15°C (59°F).
  • Intake air temperature is more than 15°C (59°F).
  • The vehicle speed is more than 1 km/h (0.6 mph).
Judgment Criterion
  • Change the A/C pressure sensor voltage is less than 0.426 volts for 3 seconds.
 
 
OBD-II DRIVE CYCLE PATTERN
 
 
PROBABLE CAUSES
  • Malfunction of harness and connectors
  • Malfunction of refrigerant pressure sensor
  • Malfunction of PHEV A/C amp.
 
 
DIAGNOSIS PROCEDURE
1.Voltage measurement at refrigerant pressure sensor connector (terminal No.1)
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Change the power supply mode of the electric motor switch to ON (READY indicator: ON).
(3) Measure the voltage between the refrigerant pressure sensor connector (terminal No.1) and body ground.
OK : About 5 V
Is the inspection result normal?
 
2.Check of open/short to ground circuit in S5 line between PHEV A/C amp. and refrigerant pressure sensor
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Check the continuity between the PHEV A/C amp. connector (S5 terminal) and body ground.
OK : No continuity
(3) Check the continuity between the PHEV A/C amp. connector (S5 terminal) and refrigerant pressure sensor.
OK : Continuity exists (2 Ω or less)
Is the inspection result normal?
Repair harness or connector.
 
3.Check of open/short to ground circuit in SH_PRE line between PHEV A/C amp. and refrigerant pressure sensor
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Check the continuity between the PHEV A/C amp. connector (SH_PRE terminal) and body ground.
OK : No continuity
(3) Check the continuity between the PHEV A/C amp. connector (SH_PRE terminal) and refrigerant pressure sensor.
OK : Continuity exists (2 Ω or less)
Is the inspection result normal?
Repair harness or connector.
 
4.Check the refrigerant pressure sensor
Check the refrigerant pressure sensor. Refer to SIMPLE INSPECTION OF THE REFRIGERANT PRESSURE SENSOR.
Is the inspection result normal?
Replace refrigerant pressure sensor. Refer to REMOVAL AND INSTALLATION.
 
5.Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to OBD-II Drive Cycle - Pattern 3 OBD-II DRIVE CYCLE.
(2) Check the DTC.
Is the DTC set?
Replace PHEV A/C amp. Refer to Removal and Installation.
The trouble can be an intermittent malfunction. Refer to General Information - How to Use Troubleshooting/Inspection Service Points, How to Cope with Intermittent Malfunctions HOW TO COPE WITH INTERMITTENT MALFUNCTIONS.