P1289

Test 1 - 2:

Test 3 - 7:

Test 8:

SYMPTOM
P1289-MANIFOLD TUNE VALVE CONTROL CIRCUIT (6 CYLINDER)

WHEN MONITORED
With the ignition on. ASD Relay energized. Battery voltage greater than 10 volts.

SET CONDITION
The PCM senses the MTV is not at the desired state.

POSSIBLE CAUSES
- Good trip equal to zero
- ASD relay output circuit open
- Noise suppressor(s) shorted to ground
- ASD output circuit shorted to ground
- MTV solenoid control circuit shorted to ASD relay output circuit
- MTV solenoid control circuit shorted to ground
- MTV solenoid control circuit open
- PCM