WINDSHIELD FOGGED [MANUAL AIR CONDITIONER]


id0703c2700700

RECIRCURATE/FRESH Lever Type Control Unit

DESCRIPTION
•  Air does not blow when airflow mode is in DEFROSTER or HEAT/DEF modes.
POSSIBLE CAUSE
•  Airflow mode wire, wire clamp malfunction
•  Climate control unit rack-and-piston, airflow mode wire malfunction
•  A/C unit airflow mode door malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY AIR INTAKE WIRE FROM A/C UNIT IS POSITIONED SECURELY AND CORRECTLY
•  Is the airflow mode wire securely installed in the correct position in relation to the A/C unit air intake links?
Yes
Go to the next step.
No
Adjust the airflow mode wire or install securely in the correct position, then go to Step 5.
2
INSPECT CLIMATE CONTROL UNIT
•  Remove the intake wire from A/C unit.
•  Inspect climate control unit airflow mode control dial operation.
•  Does the air intake lever move smoothly?
Yes
Go to the next step.
No
Repair or replace the climate control unit, then go to Step 5.
3
INSPECT A/C UNIT
•  Is there any foreign material or obstruction in the A/C unit airflow mode door?
Yes
Remove obstruction, then go to Step 5.
No
Go to the next step.
4
INSPECT A/C UNIT AIRFLOW MODE DOOR
•  Is the A/C unit airflow mode door securely and properly installed?
Yes
Inspect the airflow mode door for cracks or damage, then go to the next step.
No
Install the airflow mode door securely in the proper position, then go to the next step.
5
VERIFY THAT MALFUNCTION SYMPTOM OCCURS 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.

RECIRCURATE/FRESH Switch Type Control Unit

DESCRIPTION
•  A/C compressor does not operate while airflow mode is in DEFROSTER or HEAT/DEF modes
•  Air intake mode does not change to FRESH while airflow mode is in DEFROSTER or HEAT/DEF modes
POSSIBLE CAUSE
•  A/C compressor malfunction
•  INTERIOR 15 A fuse malfunction
•  Air intake link malfunction
•  Open or short circuit in wiring harness between climate control unit and air intake actuator
•  Air intake actuator malfunction
•  Climate control unit malfunction
•  Blower unit malfunction
•  Air intake door 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 dial in the 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.
2
INSPECT FUSE
•  Remove the INTERIOR 15 A fuse.
•  Is the fuse normal?
Yes
Go to the next step.
No
If the fuse is melted:
Repair or replace wiring harness for a short to ground and replace the fuse.
If the fuse is deterioration:
Replace the fuse.
Then go to Step 13.
3
INSPECT AIR INTAKE ACTUATOR LINK
•  Inspect the air intake actuator link.
―  Is there grease on the link?
―  Is the link securely and properly positioned?
―  Is the link free of obstructions?
•  Are the above items normal?
Yes
Go to the next step.
No
Apply grease or install the link properly and securely, remove obstruction, then go to Step 13.
*4
INSPECT WIRING HARNESS BETWEEN FUSE BLOCK AND CLIMATE CONTROL UNIT FOR CONTINUITY
•  Disconnect the climate control unit connector.
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at climate control unit terminal H (B+ signal).
•  Is the voltage approx. 12 V?
Yes
Go to the next step.
No
If there is a common connector:If there is no common connector:
Refer to the wiring diagram and verify whether or not there is a common connector between fuse block terminal and climate control unit terminal.
•  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.
•  Repair or replace the wiring harness.
Go to Step 13.
5
VERIFY WHETHER MALFUNCTION IS IN BLOWER UNIT AIR INTAKE DOOR OR ELSEWHERE
•  Switch the ignition off.
•  Connect the climate control unit connector.
•  Remove the air intake actuator.
•  Switch the ignition ON (engine off or on).
•  Set the fan switch to on position.
•  Does the air intake mode (RECIRCULATE, FRESH) change smoothly when the air intake link is operated by hand?
Yes
Go to the next step.
No
Go to Step 12.
6
INSPECT AIR INTAKE ACTUATOR
•  Inspect the air intake actuator.
•  Is it normal?
Yes
Go to the next step.
No
Replace the air intake actuator, go to Step 13.
7
INSPECT AIR INTAKE SELECTOR SWITCH AND DEFROSTER SWITCH IN CLIMATE CONTROL UNIT
•  Measure the voltage at climate control unit connector terminals C and E.
•  Is it normal?
Yes
Go to the next step.
No
Replace the climate control unit, then go to Step 13.
*8
INSPECT WIRING HARNESS BETWEEN CLIMATE CONTROL UNIT AND AIR INTAKE ACTUATOR FOR CONTINUITY
•  Switch the ignition off.
•  Is there continuity between the following air intake actuator terminals and climate control unit terminals?
L.H.D.
―  Terminal F —Terminal A (FRESH signal)
―  Terminal A —Terminal F (RECIRCULATE signal)
R.H.D.
―  Terminal A —Terminal A (FRESH signal)
―  Terminal F —Terminal B (RECIRCULATE signal)
Yes
Go to the next step.
No
If there is a common connector:If there is no common connector:
Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and air intake actuator terminal.
•  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.
•  Repair or replace the wiring harness which has an open circuit.
Go to Step 13.
*9
INSPECT WIRING HARNESS BETWEEN CLIMATE CONTROL UNIT AND AIR INTAKE ACTUATOR FOR SHORT TO GROUND
•  Is there continuity between the following climate control unit terminals and ground?
―  Terminal A (FRESH signal)
―  Terminal B (RECIRCULATE signal)
Yes
If there is a common connector:If there is no common connector:
Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and air intake actuator terminal.
•  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.
•  Repair or replace the wiring harness which has a short to ground.
Go to Step 13.
No
Go to the next step.
*10
INSPECT WIRING HARNESS BETWEEN CLIMATE CONTROL UNIT AND AIR INTAKE ACTUATOR FOR SHORT TO B+
•  Switch the ignition ON (engine off or on).
•  Measure the voltage at the following climate control unit terminals.
―  Terminal A (FRESH signal)
―  Terminal B (RECIRCULATE signal)
•  Is the voltage approx. 12 V?
Yes
If there is a common connector:If there is no common connector:
Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and air intake actuator terminal.
•  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.
•  Repair or replace the wiring harness which has a short to power supply.
Go to Step 13.
No
Replace the climate control unit, then go to Step 13.
11
INSPECT BLOWER UNIT AIR INTAKE DOOR
•  Is there any foreign matter or obstruction in the blower unit air intake door?
Yes
Remove obstruction, then go to Step 13.
No
Go to the next step.
12
VERIFY THAT BLOWER UNIT AIR INTAKE DOOR IS POSITIONED SECURELY AND PROPERLY
•  Is the blower unit air intake door securely and properly positioned?
Yes
Go to the next step.
No
Install the air intake door securely in the proper position, then go to the next step.
13
VERIFY THAT MALFUNCTION SYMPTOM OCCURS 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.