NO.11 DUAL A/C CONTROL DOES NOT OPERATE

id070300801500

11
Dual A/C control function does not operate
DESCRIPTION
•  Driver or passenger-side temperature control does not operate individually
POSSIBLE CAUSE
•  Driver-side air mix door malfunction (stuck)
•  Passenger-side air mix door malfunction (stuck)
•  driver-side front air mix actuator malfunction
•  Passenger-side front air mix actuator malfunction
•  Driver-side front air mix actuator position sensor malfunction
•  Passenger-side front air mix actuator position sensor malfunction
•  Open, short circuit in wiring or poor connection between front climate control unit and driver-side front air mix actuator
•  Open, short circuit in wiring or poor connection between front climate control unit and passenger-side front air mix actuator
•  Open, short circuit in wiring or poor connection between front climate control unit and driver-side front air mix actuator position sensor
•  Open, short circuit in wiring or poor connection between front climate control unit and passenger-side front air mix actuator position sensor
•  Front climate control unit malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
CHECK SYMPTOM
•  Turn on the front A/C.
•  Perform the dual A/C control function for driver and passenger-side individually.
•  Is it either of cannot the temperature control on driver seat side or front passenger seat side?
Yes
Go to the next step.
No
Go to Step 8.
2
INSPECT TO SEE WHETHER MALFUNCTION IS IN AIR MIX DOOR OR ELSEWHERE
•  Turn on the front A/C
•  Change temperature control for suspect side seat at the dual mode.
•  Does the suspect side air mix door move smoothly?
Yes
Go to the next step.
No
Go to Step 6.
3
INSPECT AIR MIX DOOR
•  Inspect the suspect side air mix door.
―  Is the fan free of interfere with the suspect side A/C unit case?
―  Is the fan free of foreign material and obstruction?
•  Is the air mix door normal?
Yes
Go to the next step.
No
Remove the obstruction or replace the suspect side A/C unit case, then go to Step 9.
4
INSPECT FRONT AIR MIX ACTUATOR
•  Inspect the suspect side front air mix actuator.
•  Is the front air mix actuator normal?
Yes
Go to the next step.
No
Replace the suspect front air mix actuator, then go to Step 9.
5
INSPECT TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (OPEN, SHORT OR POOR CONNECTION OF TERMINALS BETWEEN AIR MIX ACTUATOR AND FRONT CLIMATE CONTROL UNIT) OR ELSEWHERE
•  Inspect for open, short or poor connection of terminals between the suspect front air mix actuator and front climate control unit.
―  Terminal 1A (front climate control unit)— terminal G (driver-side front air mix actuator)
―  Terminal 1D (front climate control unit)— terminal F (driver-side front air mix actuator)
―  Terminal 1E (front climate control unit)— terminal F (passenger-side front air mix actuator)
―  Terminal 1C (front climate control unit)— terminal G (passenger-side front air mix actuator)
•  Is there any open, short or poor connection of terminals?
Yes
Repair or replace malfunction part, then go to Step 9.
No
Replace the front climate control unit, then go to Step 9.
6*
INSPECT FRONT AIR MIX ACTUATOR POSITION SENSOR
•  Inspect the suspect side front air mix actuator position sensor.
•  Is the front air mix actuator position sensor normal?
Yes
Go to the next step.
No
Replace the suspect front air mix actuator position sensor, then go to Step 9.
7
INSPECT TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (OPEN, SHORT OR POOR CONNECTION OF TERMINALS BETWEEN AIR MIX ACTUATOR POSITION SENSOR AND FRONT CLIMATE CONTROL UNIT) OR ELSEWHERE
•  Inspect for open, short or poor connection of terminals between the suspect front air mix actuator position sensor and front climate control unit.
―  Terminal 2F (front climate control unit)— terminal E (driver-side front air mix actuator position sensor)
―  Terminal 2G (front climate control unit)— terminal E (passenger-side front air mix actuator position sensor)
―  Terminal 2B (front climate control unit)— terminal A (each side front air mix actuator position sensor)
―  Terminal 2P (front climate control unit)— terminal C (each side front air mix actuator position sensor)
•  Is there any open, short or poor connection of terminals?
Yes
Repair or replace malfunction part, then go to Step 9.
No
Replace the front climate control unit, then go to Step 9.
8
INSPECT TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (OPEN, SHORT OR POOR CONNECTION OF TERMINALS BETWEEN FRONT CLIMATE CONTROL UNIT AND AIR MIX ACTUATOR POSITION SENSOR) OR ELSEWHERE
•  Inspect for open, short or poor connection of terminals between the front climate control unit and front air mix actuator position sensor.
―  Terminal 2B (front climate control unit)— terminal A (each front air mix actuator position sensor)
―  Terminal 2P (front climate control unit)— terminal C (each front air mix actuator position sensor)
•  Is there any open, short or poor connection of terminals?
Yes
Repair or replace malfunction part, then go to the next step.
No
Replace the front climate control unit, then go to the step.
9
CONFIRM THAT MALFUNCTION SYMPTOMS DOES NOT RECUR AFTER REPAIR
•  Does the temperature adjust individually for driver seat and front passenger seat?
Yes
Troubleshooting completed. Explain repairs to customer.
No
Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.