Chart 2D - Induction Air Control System Trooper DOHC

NOTE: Test number refer to numbers on diagnostic chart.

1. Without proper vacuum at solenoid, system will not function properly.
2. When ignition is on and engine is not running solenoid should not be energized. Solenoid is normally open; vacuum should pass to actuator.
3. With diagnostic terminal grounded, ECM should ground White/Blue wire, which should energize solenoid to prevent vacuum from passing to actuator.
4. This step checks circuit continuity.

Fig 1: Chart C-2D - Schematic (Trooper DOHC)

Courtesy of ISUZU MOTOR CO.

Fig 2: Chart C-2D - Diagnostic Flowchart (Trooper DOHC)

Courtesy of ISUZU MOTOR CO.