NO.9 DUAL A/C CONTROL DOES NOT OPERATE [FULL-AUTO AIR CONDITIONER]
id0703c1812300
9
|
Dual A/C control function does not operate
|
DESCRIPTION
|
• Driver or passenger side temperature control dial does not operate individually
• Temperature control operates normally except for dual A/C control function
|
POSSIBLE CAUSE
|
• Driver-side air mix door malfunction (stuck)
• Passenger-side air mix door malfunction (stuck)
• Driver-side air mix actuator malfunction
• Passenger-side air mix actuator malfunction
• Driver-side air mix actuator position sensor malfunction
• Passenger-side air mix actuator position sensor malfunction
• Open, short circuit in wiring or poor connection between climate control unit and driver-side air mix actuator
• Open, short circuit in wiring or poor connection between climate control unit and passenger-side air mix actuator
• Open, short circuit in wiring or poor connection between climate control unit and driver-side air mix actuator position sensor
• Open, short circuit in wiring or poor connection between climate control unit and passenger-side air mix actuator position sensor
• Climate control unit malfunction
|
Diagnostic procedure
STEP |
INSPECTION |
ACTION |
|
---|---|---|---|
1
|
CHECK SYMPTOM
• Turn on the 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 side or passenger 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 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 Step 6.
|
No
|
Go to the next step.
|
||
3
|
INSPECT AIR MIX ACTUATOR
• Inspect the suspect side air mix actuator.
• Is the air mix actuator normal?
|
Yes
|
Go to the next step.
|
No
|
Replace the suspect air mix actuator, then go to Step 9.
|
||
4
|
INSPECT TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (OPEN, SHORT OR POOR CONNECTION OF TERMINALS BETWEEN AIR MIX ACTUATOR AND CLIMATE CONTROL UNIT) OR ELSEWHERE
• Inspect for open, short or poor connection of terminals between the suspect air mix actuator and climate control unit.
L.H.D.
R.H.D.
• Is there any open, short or poor connection of terminals?
|
Yes
|
Repair or replace malfunction part, then go to Step 9.
|
No
|
Go to the next step.
|
||
5
|
INSPECT AIR MIX DOOR
• Inspect the suspect side air mix door.
• Is the air mix door normal?
|
Yes
|
Replace the climate control unit, then go to Step 9.
|
No
|
Remove the obstruction or replace the suspect side A/C unit case, then go to Step 9.
|
||
6*
|
INSPECT AIR MIX ACTUATOR POSITION SENSOR
• Inspect the suspect side air mix actuator position sensor.
• Is the air mix actuator position sensor normal?
|
Yes
|
Go to the next step.
|
No
|
Replace the suspect air mix actuator, 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 CLIMATE CONTROL UNIT) OR ELSEWHERE
• Inspect for open, short or poor connection of terminals between the suspect air mix actuator position sensor and climate control unit.
L.H.D.
R.H.D.
• Is there any open, short or poor connection of terminals?
|
Yes
|
Repair or replace malfunction part, then go to Step 9.
|
No
|
Replace the 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 CLIMATE CONTROL UNIT AND AIR MIX ACTUATOR POSITION SENSOR) OR ELSEWHERE
• Inspect for open, short or poor connection of terminals between the climate control unit and air mix actuator position sensor.
L.H.D.
R.H.D.
• 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 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 passenger seat?
|
Yes
|
Troubleshooting completed. Explain repairs to customer.
|
No
|
Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.
|