P1289

Tests 1 - 4:

Tests 5 - 9:

SYMPTOM
P1289 - MANIFOLD TUNE VALVE CONTROL CIRCUIT

POSSIBLE CAUSES
- MTV solenoid
- MTV solenoid control circuit open
- MTV solenoid shorted to ground
- PCM
- Wiring harness intermittent problem
- ASD relay output circuit open
- ASD relay output circuit shorted to ground