SCHEMATIC
Refer to AIR CONDITIONING , Air Conditioning System.
Scheme 13
| Step | Check | Yes | No |
|---|---|---|---|
| 1 SELECT CONTROL PANEL TO SELF-DIAGNOSIS MODE. Turn ignition switch to OFF. While pushing "AUTO" and "FRESH/RECIRC" switches, start the engine. | Can it be moved to the self-diagnosis mode? | Go to step 2. | Refer to A/C AND/OR SEE DIAGNOSIS SYSTEMS DO NOT OPERATE . |
| 2 CHECK INDICATOR. Turn temperature control dial clockwise by one click. Make sure that all characters illuminate on the display. | Does each character illuminate? | Go to step 3. | Go to step 7. |
| 3 CHECK EACH SENSOR AND EACH POTENTIOMETER. Turn temperature control dial clockwise by one click. If system has the trouble for each sensor and/or each potentiometer, DTC is indicated on indicator. If system has no trouble, DTC "20" is indicated on indicator. NOTE: When the sunload sensor is checked inside the passenger compartment or in the shade, DTC "25" may appear on the indicator. Always check the sunload sensor in a place where it senses direct sunlight. | Is the DTC "20" indicated on indicator? | Go to step 4. | Perform diagnosis procedure according to the displayed DTC. Refer to DTC FOR SENSOR AND POTENTIOMETER , List of Diagnostic Trouble Code (DTC). |
| 4 CHECK DOOR MOTOR POSITION SWITCH. Turn temperature control dial clockwise by one click. If system has the trouble for each door position switch, DTC is indicated on indicator. If system has no trouble, DTC "30" is indicated on indicator. | Is the DTC "30" indicated on indicator? | Go to step 5. | Perform diagnosis procedure for mode door actuator. Refer to . |
| 5 CHECK OPERATION OF EACH ACTUATOR, BLOWER FAN AND COMPRESSOR CLUTCH. Turn temperature control dial clockwise by one click. Select operating mode by pushing every "DEF" switch. Check the operation for each mode. Air inlet: Air outlet: Air mix door: Blower fan: A/C compressor | Does each mode displayed match the operating mode table? Refer to OPERATING MODE TABLE . | Go to step 6. | Go to step 7. |
| 6. CHECK INDICATED VALUE OF EACH SENSOR. Turn temperature control dial clockwise by one click. Each time the "DEF" switch is pressed, the value indicated on the display changes to correspond with the ambient sensor, in-vehicle sensor and intake sensor, in that order. Make sure there is no big difference between the temperature indicated on the display and the measured temperature. | Is a proper input signal value displayed in each sensor? | End | Go to step 7. |
| 7 CHECK POOR CONTACT. Check poor contact in A/C control module connector. | Is there poor contact in connector? | Replace A/C control module. | Repair connector. |
| NOTE |
|---|
| When the sunload sensor is checked inside the passenger compartment or in the shade, DTC "25" may appear on the indicator. Always check the sunload sensor in a place where it senses direct sunlight. |
HVAC SYSTEM (AUTO A/C) (DIAGNOSTIC) CHART