Seek Stop Test
Do this test to check the performance of the audio unit's AM and FM reception. Refer to SYMPTOM TROUBLESHOOTING: AUDIO SYSTEM SOUND IS WEAK OR DISTORTED , or No sound is heard from speaker(s) (display is normal) 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 unit to receive radio signals.
- Park the client's vehicle in an open area away from buildings or other obstructions.
- Park a known-good vehicle (same year, model, and trim level) next to the client's vehicle, facing the same direction.
- Start the engine in the client's vehicle, and turn on the radio.
- Set the FM receiver to 87.7 MHz.
- Press the "Seek +" button and record the first station that the audio unit locks onto.
- Press the "Seek +" button repeatedly, and write down each station that the audio unit locks onto until the station recorded in step 5 is reached again.
- Set the AM receiver to 530 kHz.
- Press the "Seek +" button, and record the first station that the audio unit locks onto.
- Press the "Seek +" button repeatedly, and write down each station that the audio unit locks onto until the station recorded in step 8 is reached again.
- Turn the ignition switch to LOCK (0).
- Start the engine in the known-good vehicle, and then perform steps 4 thru 10 on the known-good vehicle.
- Compare the number of stations received in steps 6 and 9 in the client'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 client's vehicle receives fewer stations by at least 10%, go to step 3 of poor AM or FM radio reception of interference (see POOR AM OR FM RADIO RECEPTION OR INTERFERENCE ).