Pathfinder 2WD V6-4.0L (VQ40DE) (2009)
1. Connect audio unit connector and front speaker connector.
2. Turn ignition switch to ACC.
3. Push "POWER" switch.
4. Check the signal between audio unit harness connector terminals with CONSULT-III or oscilloscope.
Is the audio signal voltage as specified?
YES >> Replace speaker. Refer to See: Service and Repair/Front Door Speaker/Base Audio.
NO >> Replace audio unit. Refer to See: Radio/Stereo/Service and Repair/Base Audio.