Switching Solenoid Valve Signal Check
- Install tachometer. Warm engine to normal operating temperature. Allow engine to idle. Connect Checker Light (49 F018 001) to Green connector. See Figure .
- Disconnect hose at air control valve. See Figure . Cover valve port with finger and note that Red checker light activates and air is drawn into valve at designated areas. See RED CHECKER LIGHT OPERATION table.
RED CHECKER LIGHT OPERATION
| Engine Condition | Air Flow | Light Operation |
|---|---|---|
| Idle | Yes | Off |
| Acceleration | No | On |
| Above 4200 RPM | No | On |
| Deceleration | Yes | Off |