A/C Switch, Air Flow Selector (Defroster Switch) and Air Intake Selector Inspection
Check that the voltage between the following terminals and body ground are specifications under each conditions.
If check result does not meet the specified value, replace HVAC control unit.
HVAC CONTROL UNIT SPECIFICATIONS
| Part | Circuit | Terminal | Specification | Condition |
|---|---|---|---|---|
| A/C switch | A/C switch signal circuit | 5 | Approx. 0 V | Ignition switch: "ON" position. Blower speed selector: "1, 2, 3 or 4" position. A/C switch: "ON" position. |
| Air flow selector (defroster switch) | Air flow selector (defroster switch) signal circuit | 5 | Approx. 0 V | Ignition switch: "ON" position. Blower speed selector: "1, 2, 3 or 4" position. Air flow selector: "DEF" or/and "DEF/FOOT" position. |
| 10 | ||||
| Air intake selector | Air intake selector ("FRE") circuit | 10 | Approx. 0 V | Ignition switch: "ON" position. Air intake selector: "FRE" position. |
| 13 | Approx. 12 V | |||
| Air intake selector ("REC") circuit | 13 | Approx. 0 V | Ignition switch: "ON" position. Air intake selector: "REC" position. |
|
| 10 | Approx. 12 V |