Diagnostic Procedure

STEP	INSPECTION		ACTION
1	INSPECT REFRIGERANT PRESSURE SENSOR CONNECTOR Switch the ignition to off. Disconnect the negative battery cable. Disconnect the refrigerant pressure sensor connector. Inspect the connector and terminals (corrosion, damage, pin disconnection). Are the connector and terminals normal?	Yes	Go to the next step.
1		No	Repair/replace the connector or terminal. After repair procedure, go to Step 5.
2	INSPECT REFRIGERANT PRESSURE SENSOR Inspect the refrigerant pressure sensor. (See REFRIGERANT PRESSURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER] .) Is it normal?	Yes	Go to the next step.
2		No	Replace the refrigerant pressure sensor. (See REFRIGERANT PRESSURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .) Go to the next step.
3	INSPECT REFRIGERANT PRESSURE SENSOR CIRCUIT FOR OPEN CIRCUIT Disconnect the climate control unit connector and the refrigerant pressure sensor connector. Is there continuity between the following terminals of the climate control unit and the refrigerant pressure sensor? 2L-A 2I-B 1V-C	Yes	Go to the next step.
3		No	Repair the wiring harness. Go to the next step.
4	INSPECT REFRIGERANT PRESSURE SENSOR CIRCUIT FOR SHORT TO POWER SUPPLY Is there a short circuit to power supply in the wiring harness between the following terminals of the climate control unit terminal and refrigerant pressure sensor? 2I-B	Yes	Repair the wiring harness. Go to the next step.
4		No	Go to the next step.
5	VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION Inspect the connector and terminals (corrosion, damage, pin disconnection). Are the connector and terminals normal?	Yes	Go to the next step.
5		No	Repair/replace the malfunctioning vehicle wiring harness, connector, or terminal. After repair procedure, go to the next step.
6	VERIFY THAT SAME DTC IS NOT OUTPUT AGAIN Reconnect the disconnected connectors. Connect the negative battery cable. Switch the ignition to ON. Clear the DTC for the climate control unit using the M-MDS. (See CLEARING DTC [FULL-AUTO AIR CONDITIONER] .) Perform the DTC inspection for the climate control unit using the M-MDS. (See DTC DISPLAY [FULL-AUTO AIR CONDITIONER] .) Is the same DTCs present?	Yes	Repeat the inspection from Step 1. If the malfunction does not recur, go to the next step. If the malfunction recurs, replace the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .) Go to the next step.
6		No	Go to the next step.
7	VERIFY THAT NO OTHER DTCs ARE PRESENT Verify other DTCs displayed. Are any other DTCs output?	Yes	Perform the corresponding DTC inspection.
7		No	DTC troubleshooting completed.