Problem Symptoms Table
NOTE:
When replacing the internal mechanism (computer part) of the audio system, be careful not to bring your body or clothing into contact with the terminals of the leads from the IC, etc. of the replacement part (spare part).
HINT:
This inspection procedure was prepared on the assumption of system component troubles (except for the wires and connectors, etc.). This is a simple troubleshooting which should be carried out on the vehicle during system operation.
Always inspect the trouble taking the following items into consideration.
- Open or short circuit of the wire harness
- Connector or terminal connection fault
PROBLEM SYMPTOMS CHART
| Problem | Flowchart No. | |
|---|---|---|
| Radio | Radio does not operate when power switch turned to 'ON'. | 1 |
| Display indicates when power switch turned to 'ON', but no sound (including 'noise') is produced. | 2 | |
| Noise present, but AM - FM does not operate. | 3 | |
| Any speaker does not work. | 4 | |
| Any AM or FM does not work. | 5 | |
| Few preset turning bands. | 6 | |
| Reception is poor. | 6 | |
| Sound quality is poor. | 7 | |
| Preset memory disappears. | 8 | |
| Tape Player | Cassette tape cannot be inserted. | 9 |
| Cassette tape inserted, but no power. | 10 | |
| Power comes in, but tape player does not operate. | 11 | |
| Any speaker does not work. | 12 | |
| Sound quality is poor. | 13 | |
| Tape jammed, malfunction with tape speed or auto-reverse. | 14 | |
| Cassette tape cannot be ejected. | 15 | |
| CD Player | CD cannot be inserted. | 16 |
| CD can be inserted but no power. | 17 | |
| Power coming in, but CD player does not operate. | 18 | |
| Sound jumps. | 19 | |
| Sound quality is poor (Volume faint) | 20 | |
| Any speaker does not work. | 21 | |
| CD cannot be ejected. | 22 | |
| Power Amplifier | No power comes in. | 23 |
| Power comes in, but power amplifier does not operate. | 24 | |
| Any speaker does not work. | 25 | |
| Noise | Noise occurs | 26 |
| Noise is produced by vibration or shock while driving. | 27 | |
| Noise is produced when engine starts. | 28 | |
| Steering Pad Switch | A audio system cannot be operated with steering pad switch. | 29 |
| Rear Seat Audio | Quality of sound from headphone connected to headphone terminal is poor or no sound can be heard. | 30 |
The term "AM" includes LW, MW and SW, and the term "FW" includes UKW.
- RADIO NOT OPERATING WHEN POWER SWITCH TURNED TO "ON"
- DISPLAY INDICATES WHEN POWER SWITCH TURNED TO "ON", BUT NO SOUND (INCLUDING "NOISE") IS PRODUCED
- NOISE PRESENT, BUT AM-FM NOT OPERATING
- ANY SPEAKER DOSE NOT WORK
- ANY AM OR FM DOES NOR WORK FEW PRESET TUNING BANDS
- POOR RECEPTION
- SOUND QUALITY POOR
- PRESET MEMORY DISAPPEARS
- CASSETTE TAPE CANNOT BE INSERTED
- CASSETTE TAPE INSERTED, BUT NO POWER
- POWER COMING IN, BUT TAPE PLAYER NOT OPERATING
- ANY SPEAKER DOES NOT WORK
- SOUND QUALITY POOR (VOLUME FAINT)
- TAPE JAMMED MALFUNCTION WITH TAPE SPEED OR AUTO-REVERSE
- CASSETTE TAPE WILL NOT BE EJECTED
- CD CANNOT BE INSERTED
- CD INSERTED, BUT NO POWER
- POWER COMING IN, BUT CD PLAYER NOT OPERATING
- SOUND JUMPS
- SOUND QUALITY POOR (VOLUME FAINT)
- ANY SPEAKER DOES NOT WORK
- CD WILL NOT BE EJECTED
- NO POWER COMING IN
- POWER COMING IN, BUT WOOFER (POWER) AMPLIFIER NOT OPERATING
- ANY SPEAKER DOES NOT WORK
- NOISE OCCURS
- NOISE PRODUCED BY VIBRATION OR SHOCK WHILE DRIVING
- NOISE PRODUCED WHEN ENGINE STARTS
- AUDIO SYSTEM CANNOT BE OPERATED WITH STEERING PAD SWITCH
- QUALITY OF SOUND FROM HEADPHONE TERMINAL IS POOR OR NO SOUND CAN BE HEARD
Radio
Tape Player
CD Player
Power Amplifier
Noise
Steering Pad Switch
Rear Seat Audio