1. Connect battery positive voltage to air intake actuator terminal B (or C), connect terminal C (or B) to ground, and then verify that the air intake actuator operates as shown in the table.
If the operation condition is not normal, replace the air intake actuator.
| Terminal | Air intake actuator operation |
|
| B | C |
|
| B+ | Ground | FRESH → RECIRCULATE |
| Ground | B+ | RECIRCULATE → FRESH |