Test Point 17 - Resonance Flap
TEST POINT 17: - Resonance plate Fault code - 1_44Possible Causes, Elimination, Remarks
Each time the ignition is switched on, a ground pulse is supplied by the control unit to the solenoid valve of the resonance plate. If there is a vacuum in the system, the resonance plate is audibly opened and closed. The pulse can also be triggered by means of the "Drive link activation" menu. If there is no audible pulse,
Check:
- Is there a vacuum?
- Does the resonance plate move easily?
- Control signal test:
Disconnect the plug at the solenoid valve (sensor of intake air distributor). Connect and adjust an engine tester using test leads in accordance with the manufacturer's instructions. A signal must be visible when the ignition is switched on or for the "Drive link activation" menu.
If not:
- Check paths in accordance with wiring diagram.
- Replace control unit if necessary.