1 SET SELF-DIAGNOSIS MODE BY OPERATING A/C CONTROL PANEL.
- Turn the ignition switch to OFF.
- Start the engine while holding down the AUTO switch and FRESH/RECIRC switch.
NOTE:
Self-diagnosis can also be performed with ignition switch ON, but start the engine because observing the compressor operation is difficult.
- All the indicators blink four times.
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Does the self-diagnosis function operate and do all the indicators flash four times? |
Go to step 2
. |
Refer to
DIAGNOSTIC PROCEDURE WHEN SELF DIAGNOSIS USING A/C CONTROL PANEL DOES NOT OPERATE . |
2 CHECK EACH SENSOR AND POTENTIOMETER.
- After the indicators stop blinking, automatically change to the Inspection Mode of sensor and potentiometer.
NOTE:
Display items can be changed each time the A/C switch is pressed. (Step Operation)
- Read the code appeared on the display. When no open circuit or short-circuit is found in each sensor and potentiometer, code "20" is displayed on the screen. When open circuit or short-circuit is found in each sensor and potentiometer, codes except "20" are displayed on the screen.
NOTE:
It takes one minute or more to complete all diagnostic steps after the engine has started.
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Are other codes except "20" displayed? |
Repair the defective circuit. Refer to
SENSOR CHECK TABLE . |
Go to step 3
. |
3 CHECK EACH ACTUATOR, BLOWER FAN AND COMPRESSOR.
- After completing each sensor and potentiometer inspection, change to the Inspection Mode of actuator, blower fan and compressor by pressing the defroster switch.
- Each mode will change and operate automatically every four seconds.
NOTE:
Operation mode items can be changed each time the A/C switch is pressed. (Step Operation)
- Check the operation of actuator, blower fan and compressor in each mode according to the operating mode table. Refer to
OPERATING MODE TABLE .
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Do the actuator, blower fan and compressor operate as described in the operating mode table? |
A/C control system is normal. Press the OFF switch and complete the self-diagnosis function. |
Repair each defective part. |