Diagnostic Assist Code "90" Radio Reception Condition Inspection
WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
- Tune in the radio.
- Input diagnostic assist code "90" according to diagnostic assist code input procedure. (See DIAGNOSTIC ASSIST CODE INPUT PROCEDURE .)
- Inspect the malfunctioning location according to the following table:CAUTION:
- Even if the system is normal, radio reception may be difficult depending on where the system is inspected (indoors/outdoors, or conditions at the location). Before inspecting the system, verify that radio reception is adequate.
- When performing the inspection, select a frequency (radio station) with optimum reception in the area.
Inspection Display of center display Action TAU AM Reception Level Test Result:10-5 Glass antenna, antenna amplifier (4SD)/center roof antenna (5HB), antenna feeder and tuner and amp unit are normal. TAU AM Reception Level Test Result:4-3 Change frequencies and re-perform the inspection. - Start the radio reception condition inspection mode.
- Select frequency (radio station) by operating the commander knob.
- Verify the inspection results.
TAU AM Reception Level Test Result:2-0 Inspect the glass antenna, antenna amplifier (4SD)/center roof antenna (5HB), and antenna feeder.
(See GLASS ANTENNA INSPECTION .)
(See ANTENNA AMPLIFIER INSPECTION .)
(See CENTER ROOF ANTENNA INSPECTION .)
(See ANTENNA FEEDER NO. 1 INSPECTION .)
(See ANTENNA FEEDER NO. 2 INSPECTION .)
(See ANTENNA FEEDER NO. 3 INSPECTION .)- If the glass antenna, antenna amplifier (4SD)/center roof antenna (5HB), or antenna feeder is malfunctioning:
- Replace the malfunctioning part. (See ANTENNA AMPLIFIER REMOVAL/INSTALLATION .) (See CENTER ROOF ANTENNA REMOVAL/INSTALLATION .) (See ANTENNA FEEDER NO. 1 REMOVAL/INSTALLATION .) (See ANTENNA FEEDER NO. 2 REMOVAL .) (See ANTENNA FEEDER NO. 2 INSTALLATION .) (See ANTENNA FEEDER NO. 3 REMOVAL/INSTALLATION .)
- If the glass antenna, antenna amplifier (4SD)/center roof antenna (5HB), and antenna feeder are normal:
- Replace the tuner and amp unit. (See TUNER AND AMP UNIT (TAU) REMOVAL/INSTALLATION .)
- Cancel the diagnostic assist function according to ending procedure. (See ENDING PROCEDURE .)