Diagnostic Assist Code "90" Radio Reception Condition Inspection
- Tune in the radio.
- Input diagnostic assist code "90" according to the 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 (Diagnostic Result) Action - Start the radio reception condition inspection mode.
- Select frequency (radio station) by operating the commander knob.
- Verify the inspection result.
TAU AM Reception Level Test Result:10-5 Radio reception condition is normal - Glass antenna, center roof antenna, antenna feeder, and tuner and amp unit (TAU) are normal.
TAU AM Reception Level Test Result:4-3 Radio reception condition is unstable - Change frequencies and re-perform the inspection.
TAU AM Reception Level Test Result:2-0 Inspect the center roof antenna and antenna feeder. (See CENTER ROOF ANTENNA INSPECTION .) (See ANTENNA FEEDER NO. 1 INSPECTION .) (See ANTENNA FEEDER NO. 2 INSPECTION .) - If the center roof antenna or antenna feeder is malfunctioning:
- Replace the malfunctioning part. (See CENTER ROOF ANTENNA REMOVAL/INSTALLATION .) (See ANTENNA FEEDER NO. 1 REMOVAL/INSTALLATION .) (See ANTENNA FEEDER NO. 2 REMOVAL/INSTALLATION .)
- If the center roof antenna and antenna feeder are normal:
- Replace the tuner and amp unit (TAU). (See TUNER AND AMP UNIT (TAU) REMOVAL/INSTALLATION .)
- Cancel the diagnostic assist function according to the ending procedure. (See ENDING PROCEDURE .)