SWITCH/DIAL OPERATION DOES NOT RESPOND (FRONT CLIMATE CONTROL UNIT) [FULL-AUTO AIR CONDITIONER]

id0703c1006500

DESCRIPTION
•  Specific switch/dial operation of front climate control unit does not respond
POSSIBLE CAUSE
•  Front climate control unit malfunction
―  REC/FRESH switch
―  Temperature control dial
―  MODE switch
―  AUTO switch
―  DUAL switch (with DUAL switch)
―  SYNC switch (with SYNC switch)
―  DEFROSTER switch
―  Rear switch
―  OFF switch
•  Rear window defogger switch
•  Airflow volume control switch malfunction
•  A/C switch system malfunction


Diagnostic Procedure

Step

Inspection

Action
1
VERIFY MALFUNCTION DURING EACH SWITCH/DIAL OPERATION
•  Do the related parts operate according to the switch/dial operation of the front climate control unit?
Yes
Go to Step 10.
No
If specific switch/dial operation does not respond
•  Go to the next step.
If all switch/dial operations do not respond
•  Go to the following malfunction symptom item.
2
PERFORM CLIMATE CONTROL UNIT DTC INSPECTION
•  Perform the climate control unit DTC inspection using the M-MDS.
•  Are any DTCs displayed?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)
No
Go to the next step.
3
VERIFY MALFUNCTIONING SWITCH/DIAL
•  Is the switch which does not respond to being operated the rear window defogger switch?
Yes
Verify the front body control module (FBCM) DTCs.
If DTC is displayed:
•  Repair the malfunctioning location according to the applicable DTC troubleshooting.
If DTC is not displayed:
•  Replace the front climate control unit, then go to Step 10.
No
Go to the next step.
4
VERIFY MALFUNCTIONING SWITCH/DIAL
•  Is any one of the following front climate control unit switch/dials the one which does not respond to being operated?
―  REC/FRESH switch
―  Temperature control dial
―  MODE switch
―  AUTO switch
―  DUAL switch (with DUAL switch)
―  SYNC switch (with SYNC switch)
―  DEFROSTER switch
―  Rear switch
―  OFF switch
Yes
Replace the front climate control unit, then go to Step 10.
(See FRONT CLIMATE CONTROL UNIT REMOVAL/INSTALLATION.)
No
Go to the next step.
5
VERIFY MALFUNCTION DURING AIRFLOW VOLUME CONTROL SWITCH OPERATION
•  Is the switch which does not respond to being operated the front climate control unit airflow volume control switch?
Yes
Go to the next step.
No
Go to Step 7.
6
DETERMINE IF MALFUNCTION IS CAUSED BY FRONT BLOWER MOTOR CIRCUIT MALFUNCTION OR FRONT CLIMATE CONTROL UNIT MALFUNCTION
•  Is the airflow volume setting displayed normally in the display panel after operating the front climate control unit airflow volume control switch?
Yes
Go to the following malfunction symptom item.
(See AMOUNT OF AIR BLOWN FROM FRONT VENTS DOES NOT CHANGE [FULL-AUTO AIR CONDITIONER].)
No
Replace the front climate control unit, then go to Step 10.
(See FRONT CLIMATE CONTROL UNIT REMOVAL/INSTALLATION.)
7
VERIFY MALFUNCTION DURING A/C SWITCH OPERATION
•  Is the switch which does not respond to being operated the front climate control unit A/C switch?
Yes
Go to the next step.
No
Go to Step 10.
8
DETERMINE IF MALFUNCTION IS CAUSED BY A/C OPERATION CIRCUIT MALFUNCTION OR FRONT CLIMATE CONTROL UNIT MALFUNCTION
•  Is [A/C] displayed in the display panel after operating the front climate control unit A/C switch?
Yes
Go to the following malfunction symptom item.
(See NO COOL AIRFLOW FROM VENT [FULL-AUTO AIR CONDITIONER].)
No
Go to the next step.
9
VERIFY AMBIENT TEMPERATURE
•  Is the ambient temperature -5 degrees C or less?
Yes
Normal (A/C does not turn on when ambient temperature is -5 degrees C or less to protect A/C compressor)
No
Replace the front climate control unit, then go to the next step.
(See FRONT CLIMATE CONTROL UNIT REMOVAL/INSTALLATION.)
10
VERIFY THAT MALFUNCTION SYMPTOM DOES NOT RECUR AFTER REPAIR
•  Do the related parts operate according to the switch/dial operation of the front climate control unit?
Yes
Troubleshooting completed.
Explain repairs to customer.
No
Recheck malfunction symptoms, then repeat from Step 1 if the malfunction recurs.