Diagnostic Procedure

A/C DOES NOT WORK SUFFICIENTLY DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	VERIFY RELATED DTCs Perform the DTC inspection for the following modules. (See DTC INSPECTION .) PCM Body control module (BCM) Dash-electrical supply unit Are any DTCs displayed?	Yes	Repair or replace the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-G)] .) (See DTC TABLE [PCM (SKYACTIV-G 2.5T)] .) (See DTC TABLE [BCM] .) (See DTC TABLE [DASH_ESU] .)
1		No	Go to the next step.
2	DETERMINE IF MALFUNCTION CAUSE IS A/C RELAY CONTROL SIGNAL OR A/C REQUEST SIGNAL Access the PCM simulation item [A/C_SW] using the M-MDS. (See SIMULATION INSPECTION .) Start the engine and idle it. Turn the monitor value to [TRUE] from [FALSE]. Is the magnetic clutch engaged?	Yes	Go to the next step.
2		No	Go to Step 11.
3	DETERMINE IF MALFUNCTION CAUSE IS REFRIGERANT PRESSURE SENSOR OR OTHER Access the PCM PID [A/C_REQ] using the M-MDS. (See PID/DATA MONITOR INSPECTION .) Start the engine and idle it. Verify the monitor the while turning on and off the air conditioner switch on the control control unit. Is the monitor value normal?	Yes	Go to the next step.
3		No	Go to Step 6.
4	INSPECT REFRIGERANT PRESSURE SENSOR FOR MALFUNCTION Inspect the applicable part. (Refer to REFRIGERANT PRESSURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER] , or REFRIGERANT PRESSURE SENSOR INSPECTION [MANUAL AIR CONDITIONER] in service information.) (Refer to SKYACTIV-G 2.0, SKYACTIV-G 2.5, SKYACTIV-G 2.5T (Refrigerant pressure sensor No. 1) [FULL-AUTO AIR CONDITIONER] , or SKYACTIV-G 2.0, SKYACTIV-G 2.5, SKYACTIV-G 2.5T (Refrigerant pressure sensor No. 1) [MANUAL AIR CONDITIONER] in service information.) (Refer to SKYACTIV-G 2.0, SKYACTIV-G 2.5, SKYACTIV-G 2.5T (Refrigerant pressure sensor No. 2) [FULL-AUTO AIR CONDITIONER] , or SKYACTIV-G 2.0, SKYACTIV-G 2.5, SKYACTIV-G 2.5T (Refrigerant pressure sensor No. 2) in service information.) Is the part normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to REFRIGERANT PRESSURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] , or REFRIGERANT PRESSURE SENSOR REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER] in service information.) (Refer to Refrigerant Pressure Sensor No. 1 [FULL-AUTO AIR CONDITIONER] , or Refrigerant Pressure Sensor No. 1 [MANUAL AIR CONDITIONER] in service information.) (Refer to Refrigerant Pressure Sensor No. 2 [FULL-AUTO AIR CONDITIONER] , or Refrigerant Pressure Sensor No. 2 [MANUAL AIR CONDITIONER] in service information.)
5	INSPECT REFRIGERANT CHARGING AMOUNT AND A/C COMPRESSOR FOR MALFUNCTION Inspect the following: Refrigerant charging amount A/C compressor seized Is there any malfunction?	Yes	Repair or replace the malfunctioning location and perform the repair completion verification 1.
5		No	Go to the next step.
6	DETERMINE IF MALFUNCTION CAUSE IS AMBIENT TEMPERATURE SENSOR SIGNAL OR OTHER Switch the ignition ON (engine off). Compare the ambient temperature sensor on the multi-information display with the actual ambient temperature. Does the ambient temperature on the multi-information display correspond to the actual ambient temperature?	Yes	Go to Step 9.
6		No	Go to the next step.
7	VERIFY AMBIENT TEMPERATURE SENSOR FOR MALFUNCTION Inspect the applicable part. (Refer to AMBIENT TEMPERATURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER] , or AMBIENT TEMPERATURE SENSOR INSPECTION [MANUAL AIR CONDITIONER] in service information.) Is the part normal?	Yes	Go to the next step.
7		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] , or AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER] in service information.)
8	INSPECT WIRING HARNESS (INCLUDING CONNECTOR/TERMINAL) BETWEEN PCM AND AMBIENT TEMPERATURE SENSOR FOR MALFUNCTION Inspect the applicable circuit. (See CIRCUIT INSPECTION .) (See CONNECTOR INSPECTION .) Is the circuit normal?	Yes	Go to the next step.
8		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
9	INSPECT EVAPORATOR TEMPERATURE SENSOR FOR MALFUNCTION Inspect the applicable part. (Refer to EVAPORATOR TEMPERATURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER] , or EVAPORATOR TEMPERATURE SENSOR INSPECTION [MANUAL AIR CONDITIONER] in service information.) Is the part normal?	Yes	Go to the next step.
9		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to EVAPORATOR TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] , or EVAPORATOR TEMPERATURE SENSOR REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER] in service information.)
10	INSPECT WIRING HARNESS (INCLUDING CONNECTOR/TERMINAL) BETWEEN EVAPORATOR TEMPERATURE SENSOR AND DASH-ELECTRICAL SUPPLY UNIT Inspect the applicable circuit. (See CIRCUIT INSPECTION .) (See CONNECTOR INSPECTION .) Is the circuit normal?	Yes	Go to the next step.
10		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
11	DETERMINE IF MALFUNCTION CAUSE IS A/C CONTROL SIGNAL OR MAGNETIC CLUTCH Start the engine and idle it. Access the PCM simulation item [A/C_SW] using the M-MDS. (See SIMULATION INSPECTION .) Turn the monitor value to [TRUE] from [FALSE]. Measure the voltage at the magnetic clutch terminal A (wiring harness-side). Is the voltage 10.5 V or more?	Yes	Go to the next step.
11		No	Go to Step 15.
12	INSPECT IF MALFUNCTION CAUSE IS MAGNETIC CLUTCH OR MAGNETIC CLUTCH GROUND CIRCUIT Switch the ignition off. Disconnect the magnetic clutch connector. (Refer to MAGNETIC CLUTCH DISASSEMBLY/ASSEMBLY [SKYACTIV-G 2.0, SKYACTIV-G 2.5] , or MAGNETIC CLUTCH INSPECTION [SKYACTIV-G 2.5T] in service information.) Inspect for continuity between magnetic clutch terminal A (part-side) and body ground. Is there continuity?	Yes	Go to the next step.
12		No	Go to Step 14.
13	INSPECT MAGNETIC CLUTCH FOR MALFUNCTION Inspect the applicable part. (Refer to MAGNETIC CLUTCH INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] , or MAGNETIC CLUTCH INSPECTION [SKYACTIV-G 2.5T] in service information.) Is the part normal?	Yes	Go to the next step.
13		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
14	INSPECT A/C COMPRESSOR FOR MALFUNCTION Inspect the A/C compressor for poor contact to ground. Is there any malfunction?	Yes	Repair or replace the malfunctioning location and perform the repair completion verification 1.
14		No	A/C compressor internal circuit open can be considered. Replace the A/C compressor and perform the repair completion verification 1. (Refer to A/C COMPRESSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] , or A/C COMPRESSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] in service information.)
15	INSPECT A/C RELAY FOR MALFUNCTION Inspect the A/C relay. (Refer to RELAY INSPECTION in service information.) Is the relay normal?	Yes	Go to the next step.
15		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to RELAY LOCATION in service information.)
16	INSPECT WIRING HARNESS (INCLUDING CONNECTOR/TERMINAL) BETWEEN IG1 RELAY No. 2 AND A/C RELAY Inspect the applicable circuit. (See CIRCUIT INSPECTION .) (See CONNECTOR INSPECTION .) Is the circuit normal?	Yes	Go to the next step.
16		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
17	INSPECT WIRING HARNESS (INCLUDING CONNECTOR/TERMINAL) BETWEEN BATTERY AND A/C RELAY Inspect the applicable circuit. (See CIRCUIT INSPECTION .) (See CONNECTOR INSPECTION .) Is the circuit normal?	Yes	Go to the next step.
17		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
18	INSPECT WIRING HARNESS (INCLUDING CONNECTOR/TERMINAL) BETWEEN A/C RELAY AND PCM Inspect the applicable circuit. (See CIRCUIT INSPECTION .) (See CONNECTOR INSPECTION .) Is the circuit normal?	Yes	Go to the next step.
18		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
19	INSPECT WIRING HARNESS (INCLUDING CONNECTOR/TERMINAL) BETWEEN A/C RELAY AND MAGNET CLUTCH Inspect the applicable circuit. (See CIRCUIT INSPECTION .) (See CONNECTOR INSPECTION .) Is the circuit normal?	Yes	Go to the next step.
19		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
20	INSPECT WIRING HARNESS (INCLUDING CONNECTOR/TERMINAL) BETWEEN MAIN RELAY AND COMPRESSOR VALVE Inspect the applicable circuit. (See CIRCUIT INSPECTION .) (See CONNECTOR INSPECTION .) Is the circuit normal?	Yes	Go to the next step.
20		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
21	INSPECT WIRING HARNESS (INCLUDING CONNECTOR/TERMINAL) BETWEEN COMPRESSOR VALVE AND PCM Inspect the applicable circuit. (See CIRCUIT INSPECTION .) (See CONNECTOR INSPECTION .) Is the circuit normal?	Yes	Compressor valve can be considered the cause. Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See MALFUNCTION DIAGNOSIS FLOW [CONTROLLER AREA NETWORK (CAN)] .) If the CAN communication is normal, perform the diagnosis from Step 1. If the malfunction recurs, replace the A/C compressor and perform the repair completion verification 1. (Refer to A/C COMPRESSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] , or A/C COMPRESSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] in service information.)
21		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
Repair completion verification 1	VERIFY THAT MALFUNCTION SYMPTOMS DO NOT RECUR AFTER REPAIR Does the malfunction symptom recur?	Yes	If the malfunction recurs, perform the diagnosis from Step 1.
Repair completion verification 1		No	Troubleshooting completed. (Explain repair contents to customer.)