INSUFFICIENT AIR (OR NO AIR) BLOWN FROM VENTS [FULL-AUTO AIR CONDITIONER]

DESCRIPTION

• Problem with each vent and/or duct

• Airflow mode does not change

POSSIBLE CAUSE

• ROOM 15 A fuse malfunction

• Open or short circuit in wiring harness between battery positive terminal and climate control unit

• Open or short circuit in wiring harness between climate control unit and each actuator / sensor

• Open or short circuit in wiring harness between climate control unit and airflow mode actuator position sensor

• Climate control unit connector malfunction or poor connection

• Airflow mode actuator connector malfunction or poor connection

• Airflow mode actuator malfunction

• Airflow mode link malfunction

• Airflow mode door malfunction

• Climate control unit malfunction

• Vent or duct malfunction (clogging, deformation, air leakage, improper operation)

• When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while performing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions.

If there is a problem, check to make sure connectors, terminals and wiring harnesses are connected correctly and undamaged.

Step	Inspection		Action
1	INSPECT FUSE • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Remove the ROOM 15 A fuse. • Is the fuse normal?	Yes	Go to the next step.
1		No	If the fuse is blown: • Refer to the wiring diagram and verify whether or not there is a common connector between ROOM 15 A fuse and climate control unit terminal. If there is a common connector: ― Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. ― Repair or replace the malfunctioning part. If there is no common connector: ― Repair or replace the wiring harness which has a short to ground. • Replace the fuse. If the fuse is damaged: • Replace the fuse. Then go to Step 24.
2*	INSPECT TO SEE WHETHER MALFUNCTION (OPEN CIRCUIT) IS IN B+ SIGNAL WIRING HARNESS (BETWEEN FUSE BLOCK AND CLIMATE CONTROL UNIT) OR ELSEWHERE • Disconnect the climate control unit connector. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].) • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off or on). • Measure voltage at the following terminal (wiring harness-side). With dual type climate control unit: ― Climate control unit terminal 1B With single type climate control unit: ― Climate control unit terminal L • Is the voltage B+?	Yes	Go to the next step.
2*		No	Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and fuse block terminal. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to Step 24.
3*	INSPECT TO SEE WHETHER MALFUNCTION IS IN A/C UNIT OR AIRFLOW MODE ACTUATOR • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Connect the climate control unit connector. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].) • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off or on). • Measure and record voltage at the following terminal (wiring harness-side) when airflow mode at VENT and DEFROSTER. With dual type climate control unit: ― Climate control unit terminal 2A With single type climate control unit: ― Climate control unit terminal I • Is voltage normal?	Yes	Go to Step 21.
3*		No	Go to the next step.
4*	INSPECT TO SEE WHETHER MALFUNCTION IS IN POSITION SENSOR OR ELSEWHERE • Measure voltage at the following terminals (wiring harness-side) when temperature setting to MAX HOT and MAX COLD. With dual type climate control unit: ― Climate control unit terminal 2G ― Climate control unit terminal 2E With single type climate control unit: ― Climate control unit terminal G • Are voltages normal?	Yes	Go to Step 7.
4*		No	Go to the next step.
5*	INSPECT TO SEE WHETHER MALFUNCTION (SHORT TO POWER SUPPLY OR GROUND) IS IN POSITION SENSOR POWER SUPPLY OR ELSEWHERE • Measure voltage at the following terminal (wiring harness-side). With dual type climate control unit: ― Climate control unit terminal 1N With single type climate control unit: ― Climate control unit terminal H • Is voltage approx. 5 V?	Yes	Go to the next step.
5*		No	Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and each actuator / sensor terminal. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness. Go to Step 24.
6*	INSPECT TO SEE WHETHER MALFUNCTION (SHORT TO POWER SUPPLY) IS IN POSITION SENSOR GROUND OR ELSEWHERE • Measure voltage at the following terminal (wiring harness-side). With dual type climate control unit: ― Climate control unit terminal 1J With single type climate control unit: ― Climate control unit terminal E • Is voltage below 1.0 V?	Yes	Refer to wiring diagram and inspect for open circuit following. With dual type climate control unit: • Between climate control unit terminal 1N and junction point to actuators / sensors (position sensor power supply). • Between climate control unit terminal 1J and junction point to actuators / sensors (position sensor ground). With single type climate control unit: • Between climate control unit terminal H and junction point to actuators / sensors (position sensor power supply). • Between climate control unit terminal E and junction point to actuators / sensors (position sensor ground). Repair or replace the malfunctioning part or wiring harness. Go to Step 24.
6*		No	Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and each actuator / sensor terminal. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness. Go to Step 24.
7*	INSPECT TO SEE WHETHER MALFUNCTION (SHORT TO POWER SUPPLY) IS IN WIRING HARNESS (AIRFLOW MODE POSITION SIGNAL) OR ELSEWHERE • Is voltage B+, at Step 3?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and airflow mode actuator terminal. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to power supply. Go to Step 24.
7*		No	Go to the next step.
8	INSPECT CLIMATE CONTROL UNIT CONNECTOR CONNECTION CONDITION • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Inspect the climate control unit connector engagement and connection condition. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].) • Is the connector normal?	Yes	Go to the next step.
8		No	Reconnect the climate control unit connector properly. Go to Step 24.
9	INSPECT CLIMATE CONTROL UNIT CONNECTOR TERMINAL CONDITION • Disconnect the climate control unit connector. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].) • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Are the connector and terminals normal?	Yes	Go to the next step.
9		No	Repair/replace the connector or terminal. Go to Step 24.
10	INSPECT AIRFLOW MODE ACTUATOR CONNECTOR CONNECTION CONDITION • Inspect the airflow mode actuator connector engagement and connection condition. (See AIRFLOW MODE ACTUATOR REMOVAL [FULL-AUTO AIR CONDITIONER].) • Is the connector normal?	Yes	Go to the next step.
10		No	Reconnect the airflow mode actuator connector properly. Go to Step 24.
11	INSPECT AIRFLOW MODE ACTUATOR CONNECTOR TERMINAL CONDITION • Disconnect the airflow mode actuator connector. (See AIRFLOW MODE ACTUATOR REMOVAL [FULL-AUTO AIR CONDITIONER].) • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Are the connector and terminals normal?	Yes	Go to the next step.
11		No	Repair/replace the connector or terminal. Go to Step 24.
12*	INSPECT TO SEE WHETHER MALFUNCTION (LACK OF CONTINUITY) IS IN WIRING HARNESS (AIRFLOW MODE POSITION SIGNAL) OR ELSEWHERE • Inspect for continuity between the following terminals (wiring harness-side): With dual type climate control unit: ― Climate control unit terminal 2A — airflow mode actuator terminal C With single type climate control unit: ― Climate control unit terminal I — airflow mode actuator terminal C • Is there continuity?	Yes	Go to the next step.
12*		No	Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and airflow mode actuator terminal. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness. Go to Step 24.
13*	INSPECT TO SEE WHETHER MALFUNCTION (SHORT TO GROUND) IS IN WIRING HARNESS (AIRFLOW MODE POSITION SIGNAL) OR ELSEWHERE • Inspect for continuity between the following terminal (wiring harness-side) and body ground: With dual type climate control unit: ― Terminal 2A With single type climate control unit: ― Terminal I • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and airflow mode actuator terminal. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness. Go to Step 24.
13*		No	Go to the next step.
14*	INSPECT TO SEE WHETHER MALFUNCTION (OPEN CIRCUIT) IS IN POSITION SENSOR POWER SUPPLY OR ELSEWHERE • Inspect for continuity between the following terminal (wiring harness-side) and junction point to other actuators / sensors (position sensor power supply). ― Airflow mode actuator terminal B • Is there continuity?	Yes	Go to the next step.
14*		No	Refer to the wiring diagram and verify whether or not there is a common connector between airflow mode actuator terminal and junction point to other actuators / sensor terminal. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to Step 24.
15*	INSPECT TO SEE WHETHER MALFUNCTION (OPEN CIRCUIT) IS IN POSITION SENSOR GROUND OR ELSEWHERE • Inspect for continuity between the following terminal (wiring harness-side) and junction point to other actuators / sensors (position sensor ground). ― Airflow mode actuator terminal A • Is there continuity?	Yes	Go to the next step.
15*		No	Refer to the wiring diagram and verify whether or not there is a common connector between airflow mode actuator terminal and junction point to other actuators / sensor terminal. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to Step 24.
16*	INSPECT TO SEE WHETHER MALFUNCTION IS IN AIRFLOW MODE ACTUATOR OR WIRING HARNESS (BETWEEN CLIMATE CONTROL UNIT AND AIRFLOW MODE ACTUATOR) • Connect the climate control unit connector. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].) • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off or on). • Measure voltage at the following terminals (wiring harness-side). ― Airflow mode actuator terminal F (DEFROSTER mode motor drive signal) ― Airflow mode actuator terminal D (VENT mode motor drive signal) • Are voltages normal?	Yes	Go to Step 20.
16*		No	Go to the next step.
17*	INSPECT TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (LACK OF CONTINUITY BETWEEN CLIMATE CONTROL UNIT AND AIRFLOW MODE ACTUATOR) OR ELSEWHERE • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect the climate control unit connector. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].) • Inspect for continuity between the following terminals (wiring harness-side): With dual type climate control unit: ― Climate control unit terminal 2K — airflow mode actuator terminal F (DEFROSTER mode motor drive signal) ― Climate control unit terminal 2I — airflow mode actuator terminal D (VENT mode motor drive signal) With single type climate control unit: ― Climate control unit terminal V — airflow mode actuator terminal F (DEFROSTER mode motor drive signal) ― Climate control unit terminal T — airflow mode actuator terminal D (VENT mode motor drive signal) • Is there continuity?	Yes	Go to the next step.
17*		No	Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and airflow mode actuator terminal. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness. Go to Step 24.
18*	INSPECT TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (SHORT TO B+ BETWEEN CLIMATE CONTROL UNIT AND AIRFLOW MODE ACTUATOR) OR ELSEWHERE • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Switch the ignition ON (engine off or on). • Measure voltage at the following terminals (wiring harness-side). With dual type climate control unit: ― Climate control unit terminal 2K (DEFROSTER mode motor drive signal) ― Climate control unit terminal 2I (VENT mode motor drive signal) With single type climate control unit: ― Climate control unit terminal V (DEFROSTER mode motor drive signal) ― Climate control unit terminal T (VENT mode motor drive signal) • Are voltages approx. 0 V?	Yes	Go to the next step.
18*		No	Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and airflow mode actuator terminal. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to power supply. Go to Step 24.
19*	INSPECT TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (SHORT TO GROUND BETWEEN CLIMATE CONTROL UNIT AND AIRFLOW MODE ACTUATOR) OR ELSEWHERE • Switch the ignition off. • Inspect for continuity between the following terminals (wiring harness-side) and body ground: With dual type climate control unit: ― Climate control unit terminal 2K (DEFROSTER mode motor drive signal) ― Climate control unit terminal 2I (VENT mode motor drive signal) With single type climate control unit: ― Climate control unit terminal V (DEFROSTER mode motor drive signal) ― Climate control unit terminal T (VENT mode motor drive signal) • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and airflow mode actuator terminal. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to ground. Go to Step 24.
19*		No	Go to the next step.
20	INSPECT AIRFLOW MODE ACTUATOR • Inspect airflow mode actuator. (See AIRFLOW MODE ACTUATOR INSPECTION [FULL-AUTO AIR CONDITIONER].) • Is airflow mode actuator normal?	Yes	Replace the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].) Go to Step 24.
20		No	Replace the airflow mode actuator. (See AIRFLOW MODE ACTUATOR INSTALLATION [FULL-AUTO AIR CONDITIONER].) Then go to Step 24.
21	INSPECT AIRFLOW MODE LINK • Inspect airflow mode links. (See A/C UNIT DISASSEMBLY/ASSEMBLY.) ― Is grease on link? ― Are links securely and properly installed? ― Are links free of obstructions and hindrances? • Are the above items normal?	Yes	Go to the next step.
21		No	Apply grease to links. If any links are damaged, replace malfunctioning part. (See A/C UNIT REMOVAL/INSTALLATION.) Then go to Step 24.
22	INSPECT AIRFLOW MODE DOOR • Inspect airflow mode door. (See A/C UNIT REMOVAL/INSTALLATION.) ― Is door free of obstructions, cracks and damage? ― Are door securely and properly installed? • Are the above items normal?	Yes	Go to the next step.
22		No	Remove the obstruction, or install door in proper position. If any doors are cracked or damaged, replace them. Then go to Step 24. (See A/C UNIT REMOVAL/INSTALLATION.)
23	VERIFY DUCT INSTALLATION CONDITION • Are the following ducts installed properly? (See DASHBOARD REMOVAL.) (See DASHBOARD INSTALLATION.) (See REAR HEAT DUCT REMOVAL/INSTALLATION.) ― Dashboard ducts ― Defroster ducts ― Rear heat duct	Yes	Inspect ducts for restriction, deformity, and air leakage, then go to the next step.
23		No	Install the incorrectly installed ducts properly, then go to the next step. (See DASHBOARD DISASSEMBLY/ASSEMBLY.) (See REAR HEAT DUCT REMOVAL/INSTALLATION.)
24	VERIFY THAT MALFUNCTION SYMPTOM DOES NOT RECUR AFTER REPAIR • Is air discharged from vent?	Yes	Troubleshooting completed. Explain repairs to customer.
24		No	Recheck malfunction symptoms, then repeat from Step 1 if the malfunction recurs.