WINDSHIELD FOGGED [CLIMATE CONTROL SYSTEM]

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Note
•  There are two types of front climate control unit, type A and type B.
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Front Climate Control Unit Type A

DESCRIPTION
•  A/C compressor does not operate while airflow mode is in DEFROSTER or DEF/HEAT modes
•  Air intake mode does not change to FRESH while airflow mode is in DEFROSTER or DEF/HEAT modes
POSSIBLE CAUSE
•  A/C compressor malfunction
•  Blower unit malfunction
•  ROOM 25 A fuse malfunction
•  INTERIOR 10 A fuse malfunction
•  Open or short circuit in wiring harness between battery positive terminal and front climate control unit
•  Open or short circuit in wiring harness between front climate control unit and each actuator / sensor
•  Open or short circuit in wiring harness between front climate control unit and air intake actuator position sensor
•  Front climate control unit connector malfunction or poor connection
•  Air intake actuator connector malfunction or poor connection
•  Air intake actuator malfunction
•  Air intake door malfunction
•  Front climate control unit malfunction
•  When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while doing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, inspect to make sure connectors, terminals and wiring harness are connected correctly and undamaged.

Diagnostic procedure

Step

Inspection

Action
1
COOL AIR BLOW OUT INSPECTION
•  When both the A/C switch and airflow volume control switch in the front climate control unit are on, does cool air blow out from the vent?
Yes
Go to the next step.
No
Go to Step 1 of the following troubleshooting.
NO COOL AIR FROM FRONT/REAR VENTS [CLIMATE CONTROL SYSTEM]
2
INSPECT FUSE
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Remove the ROOM 25 A fuse and INTERIOR 10 A fuse.
•  Is the fuse normal?
Yes
Go to the next step.
No
If the fuse is blown:
•  Refer to the wiring diagram and verify whether or not there is a common connector between ROOM 25 A fuse and front climate control unit / rear 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 23.
3*
INSPECT TO SEE WHETHER MALFUNCTION (OPEN CIRCUIT) IS IN B+ SIGNAL WIRING HARNESS (BETWEEN FUSE BLOCK AND FRONT CLIMATE CONTROL UNIT) OR ELSEWHERE
•  Disconnect the front climate control unit connector.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on).
•  Measure voltage at the following terminal (wiring harness-side).
?  Front climate control unit terminal 1U
•  Is the voltage B+?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between front 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 23.
4*
INSPECT TO SEE WHETHER MALFUNCTION IS IN BLOWER UNIT OR AIR INTAKE ACTUATOR
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Connect the front climate control unit connector.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on).
•  Measure and record voltage at the following terminal (wiring harness-side) when air intake mode at RECIRCULATE and FRESH.
?  Front climate control unit terminal 1N
•  Is voltage normal?
Yes
Go to Step 22.
No
Go to the next step.
5*
INSPECT TO SEE WHETHER MALFUNCTION IS IN POSITION SENSOR OR ELSEWHERE
•  Measure voltage at the following terminal (wiring harness-side) when airflow mode at VENT and DEFROSTER.
?  Front climate control unit terminal 1V
•  Is voltage normal?
Yes
Go to Step 8.
No
Go to the next step.
6*
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).
?  Front climate control unit terminal 1R
•  Is voltage approx. 5 V?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between front 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 23.
7*
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).
?  Front climate control unit terminal 1I
•  Is voltage below 1.0 V?
Yes
Refer to wiring diagram and inspect for open circuit following.
•  Between front climate control unit 1R and junction point to front actuators /sensors (position sensor power supply).
•  Between front climate control unit 1I and junction point to front actuators /sensors (position sensor ground).
Repair or replace the malfunctioning part or wiring harness.
Go to Step 23.
No
Refer to the wiring diagram and verify whether or not there is a common connector between front 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 23.
8*
INSPECT TO SEE WHETHER MALFUNCTION (SHORT TO POWER SUPPLY) IS IN WIRING HARNESS (AIR INTAKE POSITION SIGNAL) OR ELSEWHERE
•  Is voltage B+, at Step 4?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between front climate control unit terminal and air intake 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 23.
No
Go to the next step.
9
INSPECT FRONT CLIMATE CONTROL UNIT CONNECTOR CONNECTION CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Inspect the front climate control unit connector engagement and connection condition.
•  Is the connector normal?
Yes
Go to the next step.
No
Reconnect the front climate control unit connector properly.
Go to Step 23.
10
INSPECT FRONT CLIMATE CONTROL UNIT CONNECTOR TERMINAL CONDITION
•  Disconnect the front climate control unit connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Are the connector and terminals normal?
Yes
Go to the next step.
No
Repair/replace the connector or terminal.
Go to Step 23.
11
INSPECT AIR INTAKE ACTUATOR CONNECTOR CONNECTION CONDITION
•  Inspect the air intake actuator connector engagement and connection condition.
•  Is the connector normal?
Yes
Go to the next step.
No
Reconnect the air intake actuator connector properly.
Go to Step 23.
12
INSPECT AIR INTAKE ACTUATOR CONNECTOR TERMINAL CONDITION
•  Disconnect the air intake actuator connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Are the connector and terminals normal?
Yes
Go to the next step.
No
Repair/replace the connector or terminal.
Go to Step 23.
13*
INSPECT TO SEE WHETHER MALFUNCTION (LACK OF CONTINUITY) IS IN WIRING HARNESS (AIR INTAKE POSITION SIGNAL) OR ELSEWHERE
•  Inspect for continuity between the following terminals (wiring harness-side):
?  Front climate control unit terminal 1N — air intake actuator terminal B
•  Is there continuity?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between front climate control unit terminal and air intake 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 23.
14*
INSPECT TO SEE WHETHER MALFUNCTION (SHORT TO GROUND) IS IN WIRING HARNESS (AIR INTAKE POSITION SIGNAL) OR ELSEWHERE
•  Inspect for continuity between the following terminal (wiring harness-side) and body ground:
?  Front climate control unit terminal 1N
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between front climate control unit terminal and air intake 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 23.
No
Go to the next step.
15*
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).
?  Air intake actuator terminal C
•  Is there continuity?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between air intake 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 23.
16*
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).
?  Air intake actuator terminal A
•  Is there continuity?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between air intake 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 23.
17*
INSPECT TO SEE WHETHER MALFUNCTION IS IN AIR INTAKE ACTUATOR OR WIRING HARNESS (BETWEEN FRONT CLIMATE CONTROL UNIT AND AIR INTAKE ACTUATOR)
•  Connect the front climate control unit connector.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on).
•  Measure voltage at the following terminals (wiring harness-side).
?  Air intake actuator terminal E (RECIRCULATE mode motor drive signal)
?  Air intake actuator terminal D (FRESH mode motor drive signal)
•  Are voltages normal?
Yes
Go to Step 21.
No
Go to the next step.
18*
INSPECT TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (LACK OF CONTINUITY BETWEEN FRONT CLIMATE CONTROL UNIT AND AIR INTAKE ACTUATOR) OR ELSEWHERE
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the front climate control unit connector.
•  Inspect for continuity between the following terminals (wiring harness-side):
?  Front climate control unit terminal 2D — air intake actuator terminal E (RECIRCULATE mode motor drive signal)
?  Front climate control unit terminal 2B — airflow mode actuator terminal D (FRESH mode motor drive signal)
•  Is there continuity?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between front climate control unit terminal and air intake 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 23.
19*
INSPECT TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (SHORT TO B+ BETWEEN FRONT CLIMATE CONTROL UNIT AND AIR INTAKE ACTUATOR) OR ELSEWHERE
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on).
•  Measure voltage at the following terminals (wiring harness-side).
?  Front climate control unit terminal 2D (RECIRCULATE mode motor drive signal)
?  Front climate control unit terminal 2B (FRESH mode motor drive signal)
•  Are voltages approx. 0 V?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between front climate control unit terminal and air intake 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 23.
20*
INSPECT TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (SHORT TO GROUND BETWEEN FRONT CLIMATE CONTROL UNIT AND AIR INTAKE ACTUATOR) OR ELSEWHERE
•  Switch the ignition off.
•  Inspect for continuity between the following terminals (wiring harness-side) and body ground:
?  Front climate control unit terminal 2D (RECIRCULATE mode motor drive signal)
?  Front climate control unit terminal 2B (FRESH mode motor drive signal)
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between front climate control unit terminal and air intake 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 23.
No
Go to the next step.
21
INSPECT AIR INTAKE ACTUATOR
•  Inspect air intake actuator.
•  Is air intake actuator normal?
Yes
Replace the front climate control unit.
(See FRONT CLIMATE CONTROL UNIT REMOVAL/INSTALLATION.)
Go to Step 23.
No
Replace the air intake actuator.
(See AIR INTAKE ACTUATOR INSTALLATION.)
Then go to Step 23.
22
INSPECT AIR INTAKE LINK
•  Inspect air intake links.
?  Is grease on link?
?  Are links securely and properly installed?
?  Are links free of obstructions and hindrances?
•  Are the above items normal?
Yes
Inspect the air intake doors.
(See BLOWER UNIT DISASSEMBLY/ASSEMBLY.)
•  If any doors are cracked or damaged, replace them.
•  If any doors are not installed securely and properly. Install them in proper positions.
•  If there are any obstructions, remove them.
Go to the next step.
No
Apply grease to links.
If any links are damaged, replace malfunctioning part.
Then go to the next step.
23
VERIFY THAT MALFUNCTION SYMPTOM DOES NOT RECUR AFTER REPAIR
•  Does the malfunction disappear?
Yes
Troubleshooting completed.
Explain repairs to customer.
No
Recheck malfunction symptoms, then repeat from Step 1 if the malfunction recurs.


Front Climate Control Unit Type B

DESCRIPTION
•  A/C compressor does not operate while airflow mode is in DEFROSTER or DEF/HEAT modes
•  Air intake mode does not change to FRESH while airflow mode is in DEFROSTER or DEF/HEAT modes
POSSIBLE CAUSE
•  A/C compressor malfunction
•  Blower unit malfunction
•  ROOM 25 A fuse malfunction
•  INTERIOR 10 A fuse malfunction
•  Open or short circuit in wiring harness between battery positive terminal and front climate control unit
•  Open or short circuit in wiring harness between front climate control unit and each actuator / sensor
•  Open or short circuit in wiring harness between front climate control unit and air intake actuator position sensor
•  Front climate control unit connector malfunction or poor connection
•  Air intake actuator connector malfunction or poor connection
•  Air intake actuator malfunction
•  Air intake door malfunction
•  Front climate control unit malfunction
•  When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while doing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, inspect to make sure connectors, terminals and wiring harness are connected correctly and undamaged.

Diagnostic procedure

Step

Inspection

Action
1
COOL AIR BLOW OUT INSPECTION
•  When both the A/C switch and airflow volume control switch in the front climate control unit are on, does cool air blow out from the vent?
Yes
Go to the next step.
No
Go to Step 1 of the following troubleshooting.
NO COOL AIR FROM FRONT/REAR VENTS [CLIMATE CONTROL SYSTEM]
2
INSPECT FUSE
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Remove the ROOM 25 A fuse and INTERIOR 10 A fuse.
•  Is the fuse normal?
Yes
Go to the next step.
No
If the fuse is blown:
•  Refer to the wiring diagram and verify whether or not there is a common connector between ROOM 25 A fuse and front climate control unit / rear 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 23.
3*
INSPECT TO SEE WHETHER MALFUNCTION (OPEN CIRCUIT) IS IN B+ SIGNAL WIRING HARNESS (BETWEEN FUSE BLOCK AND FRONT CLIMATE CONTROL UNIT) OR ELSEWHERE
•  Disconnect the front climate control unit connector.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on).
•  Measure voltage at the following terminal (wiring harness-side).
?  Front climate control unit terminal 1U
•  Is the voltage B+?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between front 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 23.
4*
INSPECT TO SEE WHETHER MALFUNCTION IS IN BLOWER UNIT OR AIR INTAKE ACTUATOR
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Connect the front climate control unit connector.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on).
•  Measure and record voltage at the following terminal (wiring harness-side) when air intake mode at RECIRCULATE and FRESH.
?  Front climate control unit terminal 1D
•  Is voltage normal?
Yes
Go to Step 22.
No
Go to the next step.
5*
INSPECT TO SEE WHETHER MALFUNCTION IS IN POSITION SENSOR OR ELSEWHERE
•  Measure voltage at the following terminal (wiring harness-side) when airflow mode at VENT and DEFROSTER.
?  Front climate control unit terminal 1B
•  Is voltage normal?
Yes
Go to Step 8.
No
Go to the next step.
6*
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).
?  Front climate control unit terminal 1C
•  Is voltage approx. 5 V?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between front 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 23.
7*
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).
?  Front climate control unit terminal 1Q
•  Is voltage below 1.0 V?
Yes
Refer to wiring diagram and inspect for open circuit following.
•  Between front climate control unit 1C and junction point to front actuators /sensors (position sensor power supply).
•  Between front climate control unit 1Q and junction point to front actuators /sensors (position sensor ground).
Repair or replace the malfunctioning part or wiring harness.
Go to Step 23.
No
Refer to the wiring diagram and verify whether or not there is a common connector between front 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 23.
8*
INSPECT TO SEE WHETHER MALFUNCTION (SHORT TO POWER SUPPLY) IS IN WIRING HARNESS (AIR INTAKE POSITION SIGNAL) OR ELSEWHERE
•  Is voltage B+, at Step 4?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between front climate control unit terminal and air intake 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 23.
No
Go to the next step.
9
INSPECT FRONT CLIMATE CONTROL UNIT CONNECTOR CONNECTION CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Inspect the front climate control unit connector engagement and connection condition.
•  Is the connector normal?
Yes
Go to the next step.
No
Reconnect the front climate control unit connector properly.
Go to Step 23.
10
INSPECT FRONT CLIMATE CONTROL UNIT CONNECTOR TERMINAL CONDITION
•  Disconnect the front climate control unit connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Are the connector and terminals normal?
Yes
Go to the next step.
No
Repair/replace the connector or terminal.
Go to Step 23.
11
INSPECT AIR INTAKE ACTUATOR CONNECTOR CONNECTION CONDITION
•  Inspect the air intake actuator connector engagement and connection condition.
•  Is the connector normal?
Yes
Go to the next step.
No
Reconnect the air intake actuator connector properly.
Go to Step 23.
12
INSPECT AIR INTAKE ACTUATOR CONNECTOR TERMINAL CONDITION
•  Disconnect the air intake actuator connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Are the connector and terminals normal?
Yes
Go to the next step.
No
Repair/replace the connector or terminal.
Go to Step 23.
13*
INSPECT TO SEE WHETHER MALFUNCTION (LACK OF CONTINUITY) IS IN WIRING HARNESS (AIR INTAKE POSITION SIGNAL) OR ELSEWHERE
•  Inspect for continuity between the following terminals (wiring harness-side):
?  Front climate control unit terminal 1D — air intake actuator terminal B
•  Is there continuity?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between front climate control unit terminal and air intake 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 23.
14*
INSPECT TO SEE WHETHER MALFUNCTION (SHORT TO GROUND) IS IN WIRING HARNESS (AIR INTAKE POSITION SIGNAL) OR ELSEWHERE
•  Inspect for continuity between the following terminal (wiring harness-side) and body ground:
?  Front climate control unit terminal 1D
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between front climate control unit terminal and air intake 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 23.
No
Go to the next step.
15*
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).
?  Air intake actuator terminal C
•  Is there continuity?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between air intake 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 23.
16*
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).
?  Air intake actuator terminal A
•  Is there continuity?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between air intake 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 23.
17*
INSPECT TO SEE WHETHER MALFUNCTION IS IN AIR INTAKE ACTUATOR OR WIRING HARNESS (BETWEEN FRONT CLIMATE CONTROL UNIT AND AIR INTAKE ACTUATOR)
•  Connect the front climate control unit connector.
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on).
•  Measure voltage at the following terminals (wiring harness-side).
?  Air intake actuator terminal E (RECIRCULATE mode motor drive signal)
?  Air intake actuator terminal D (FRESH mode motor drive signal)
•  Are voltages normal?
Yes
Go to Step 21.
No
Go to the next step.
18*
INSPECT TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (LACK OF CONTINUITY BETWEEN FRONT CLIMATE CONTROL UNIT AND AIR INTAKE ACTUATOR) OR ELSEWHERE
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Disconnect the front climate control unit connector.
•  Inspect for continuity between the following terminals (wiring harness-side):
?  Front climate control unit terminal 2F — air intake actuator terminal E (RECIRCULATE mode motor drive signal)
?  Front climate control unit terminal 2H — airflow mode actuator terminal D (FRESH mode motor drive signal)
•  Is there continuity?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between front climate control unit terminal and air intake 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 23.
19*
INSPECT TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (SHORT TO B+ BETWEEN FRONT CLIMATE CONTROL UNIT AND AIR INTAKE ACTUATOR) OR ELSEWHERE
•  Connect the negative battery terminal.
•  Switch the ignition ON (engine off or on).
•  Measure voltage at the following terminals (wiring harness-side).
?  Front climate control unit terminal 2F (RECIRCULATE mode motor drive signal)
?  Front climate control unit terminal 2H (FRESH mode motor drive signal)
•  Are voltages approx. 0 V?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between front climate control unit terminal and air intake 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 23.
20*
INSPECT TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (SHORT TO GROUND BETWEEN FRONT CLIMATE CONTROL UNIT AND AIR INTAKE ACTUATOR) OR ELSEWHERE
•  Switch the ignition off.
•  Inspect for continuity between the following terminals (wiring harness-side) and body ground:
?  Front climate control unit terminal 2F (RECIRCULATE mode motor drive signal)
?  Front climate control unit terminal 2H (FRESH mode motor drive signal)
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between front climate control unit terminal and air intake 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 23.
No
Go to the next step.
21
INSPECT AIR INTAKE ACTUATOR
•  Inspect air intake actuator.
•  Is air intake actuator normal?
Yes
Replace the front climate control unit.
(See FRONT CLIMATE CONTROL UNIT REMOVAL/INSTALLATION.)
Go to Step 23.
No
Replace the air intake actuator.
(See AIR INTAKE ACTUATOR INSTALLATION.)
Then go to Step 23.
22
INSPECT AIR INTAKE LINK
•  Inspect air intake links.
?  Is grease on link?
?  Are links securely and properly installed?
?  Are links free of obstructions and hindrances?
•  Are the above items normal?
Yes
Inspect the air intake doors.
(See BLOWER UNIT DISASSEMBLY/ASSEMBLY.)
•  If any doors are cracked or damaged, replace them.
•  If any doors are not installed securely and properly. Install them in proper positions.
•  If there are any obstructions, remove them.
Go to the next step.
No
Apply grease to links.
If any links are damaged, replace malfunctioning part.
Then go to the next step.
23
VERIFY THAT MALFUNCTION SYMPTOM DOES NOT RECUR AFTER REPAIR
•  Does the malfunction disappear?
Yes
Troubleshooting completed.
Explain repairs to customer.
No
Recheck malfunction symptoms, then repeat from Step 1 if the malfunction recurs.