Sound Quality Diagnosis - Seek Stop Test

Sound Quality Diagnosis - Seek Stop Test

Seek Stop Test

Do this test to check the performance of the audio-navigation unit's or audio unit's AM and FM reception. Refer to symptom troubleshooting; Audio system sound is weak or distorted, Audio System Sound Is Weak Or Distorted (Display Is Normal) or No sound is heard from the speakers (display is normal); with navigation, No Sound Is Heard From The Speaker(s) (Display Is Normal) (With Navigation) without navigation No Sound Is Heard From The Speaker(s) (Display Is Normal) (Without Navigation, With Audio) before continuing with this test.

NOTE:

- Window tint, aftermarket theft-recovery devices and other aftermarket accessories may reduce radio reception.

- Changes in cloud cover and other atmosphere conditions will affect the ability of the audio-navigation unit or audio unit to receive radio signals.

1. Park the customer's vehicle in an open area away from buildings or other obstructions.

2. Park a known-good vehicle (same year, model, and trim level) next to the customer's vehicle, facing the same direction.

3. Start the engine in the customer's vehicle, and turn on the radio.

4. Set the FM receiver to 87.7 MHz.

5. Press the Seek + button and record the first station that the audio-navigation unit or audio unit locks onto.

6. Press the Seek + button repeatedly, and write down each station that the audio-navigation unit or audio unit locks onto until the station recorded in step 5 is reached again.

7. Set the AM receiver to 530 kHz.

8. Press the Seek + button, and record the first station that the audio-navigation unit or audio unit locks on to.

9. Press the Seek + button repeatedly, and write down each station that the audio-navigation unit or audio unit locks onto until the station recorded in step 8 is reached again.

10. Turn the ignition switch to LOCK (0).

11. Start the engine in the known-good vehicle, and then do step 4 thru 10 on the known-good vehicle.

12. Compare the number of stations received in step 6 and 9 in the customer's vehicle with the number of stations received in the known-good vehicle.
- If the number of stations received is the same, or within 10 %, the audio unit's tuner performance is OK. The problem may be atmospheric conditions, multi path interference, or other obstructions to the radio signal.

- If the customer's vehicle receives fewer stations by at least 10 %, go to step 2 of Poor AM or FM radio reception of interference; with navigation, Symptom Troubleshooting without navigation. Poor AM Or FM Radio Reception Or Interference (Without Navigation, With Audio)