Diagnostic Procedure

INEFFECTIVE OPERATION OF A/C DURING ENGINE STOP, I-STOP SYSTEM (SKYACTIV-G VIN Y) DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	DETERMINE IF MALFUNCTION CAUSE IS i-stop SYSTEM OR A/C SYSTEM Verify the malfunction symptom. Does the malfunction occur only while the i-stop function is operating (engine stopped)?	Yes	Go to the next step.
1		No	Go to the applicable A/C malfunction diagnostic procedure. (See TROUBLESHOOTING INDEX [FULL-AUTO AIR CONDITIONER] .)
2	VERIFY DTC Perform the DTC inspection for the following modules. (See DTC INSPECTION .) PCM Dash-electrical supply unit Body control module (BCM) Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-G VIN Y)] .) (See DTC TABLE [DASH-ELECTRICAL SUPPLY UNIT] .) (See DTC TABLE [BODY CONTROL MODULE (BCM)] .)
2		No	Go to the next step.
3	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 6.
3		No	Go to the next step.
4	INSPECT AMBIENT TEMPERATURE SENSOR FOR MALFUNCTION Inspect the applicable part. (See AMBIENT TEMPERATURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER] .) Is the part normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .)
5	INSPECT AMBIENT TEMPERATURE SENSOR SIGNAL CIRCUIT AND GROUND CIRCUIT FOR SHORT CIRCUIT AND OPEN CIRCUIT Inspect the applicable circuit for a short circuit and open circuit. (See CIRCUIT INSPECTION .) Is the circuit normal?	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning location and perform the repair completion verification.
6	DETERMINE IF MALFUNCTION CAUSE IS PASSENGER COMPARTMENT TEMPERATURE SENSOR SIGNAL OR OTHER Access the climate control unit PID [AMB_TEMP_INTERNAL] using the M-MDS. (See PID/DATA MONITOR INSPECTION .) (See PID/DATA MONITOR TABLE [PCM (SKYACTIV-G VIN Y)] .) Does the [AMB_TEMP_INTERNAL] PID value indicate the actual cabin temperature of the vehicle?	Yes	Go to Step 9.
6		No	Go to the next step.
7	INSPECT PASSENGER COMPARTMENT TEMPERATURE SENSOR FOR MALFUNCTION Inspect the applicable part. (See PASSENGER COMPARTMENT TEMPERATURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER] .) Is the part normal?	Yes	Go to the next step.
7		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See PASSENGER COMPARTMENT TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .)
8	INSPECT PASSENGER COMPARTMENT TEMPERATURE SENSOR SIGNAL CIRCUIT AND GROUND CIRCUIT FOR SHORT CIRCUIT AND OPEN CIRCUIT Inspect the applicable circuit for a short circuit and open circuit. (See CIRCUIT 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.
9	DETERMINE IF MALFUNCTION CAUSE IS SOLAR RADIATION SENSOR SIGNAL OR OTHER Access the dash-electrical supply unit PID [SOLAR_SEN_L] and [SOLAR_SEN_R] using the M-MDS. (See PID/DATA MONITOR INSPECTION .) (See PID/DATA MONITOR TABLE [PCM (SKYACTIV-G VIN Y)] .) Does the [SOLAR_SEN_L] and [SOLAR_SEN_R] PID value display according to the solar radiation condition?	Yes	Go to Step 11.
9		No	Go to the next step.
10	INSPECT SOLAR RADIATION SENSOR LIN COMMUNICATION LINE FOR SHORT CIRCUIT AND OPEN CIRCUIT Inspect the applicable circuit for a short circuit and open circuit. (See CIRCUIT INSPECTION .) Is the circuit normal?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW .) If the CAN communication is normal, perform the diagnosis from Step 1. If the malfunction recurs, replace the solar radiation sensor and perform the repair completion verification. (See RAIN SENSOR REMOVAL/INSTALLATION .)
10		No	Repair or replace the malfunctioning location and perform the repair completion verification.
11	INSPECT DRIVER-SIDE AIR MIX ACTUATOR FOR MALFUNCTION Inspect the applicable part. (See AIR MIX ACTUATOR INSPECTION [FULL-AUTO AIR CONDITIONER] .) Is the part normal?	Yes	Inspect the air mix door and linkage for sticking. (See A/C UNIT DISASSEMBLY/ASSEMBLY .) If there is no malfunction: Go to the next step. If there is any malfunction: Repair or replace the malfunctioning location and perform the repair completion verification.
11		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See AIR MIX ACTUATOR REMOVAL [FULL-AUTO AIR CONDITIONER] .) (See AIR MIX ACTUATOR INSTALLATION [FULL-AUTO AIR CONDITIONER] .)
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED Install/connect the part removed/disconnected during the troubleshooting procedure. Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting. (Explain contents of repair to customer)
Repair completion verification 1		No	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW .) If the CAN communication is normal, perform the diagnosis from Step 1. If the malfunction recurs, go to the next step.
Repair completion verification 2	VERIFY IF MALFUNCTION IS CAUSED BY NOT PERFORMING PCM REPROGRAMMING Verify repair information and verify that there is a new calibration in the PCM. Is there a new calibration in the PCM?	Yes	Perform the PCM reprogramming and verify if the malfunction symptom was corrected. If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION .)
Repair completion verification 2		No	Replace the PCM. (See PCM REMOVAL/INSTALLATION .)