No Sound is Heard From Speakers (Display Is Normal)
No sound is heard from speakers (display is normal)NOTE:
- Set the fader and balance positions to the center.
- Before performing symptom troubleshooting, do the power switch will not turn ON troubleshooting.
- Always check the connectors for poor connections or loose terminals.
1. Check that the volume button is not set to the min level.
Is it at MIN level?
YES - Raise the volume level, and recheck the function.
NO - Go to step 2.
2. Check to see if there is a specific speaker that has no sound.
Is there a specific one?
YES - Go to step 3.
NO - Go to step 6.
3. Turn the ignition switch OFF.
4. Check the speaker that has no sound for any damage.
Is there any damage?
YES - Replace the speaker and recheck.
NO - Go to step 5.
5. Remove the speaker(s) that has no sound, and disconnect its connector.
6. Check the speaker 2P connector for a loose or poor connection.
Reconnect the speaker 2P connector, and recheck the symptom; does it still appear?
YES - Go to step 7.
NO - Operation is normal.
7. Measure the resistance between the No. 1 and No. 2 terminals of the speaker connector.
Is there about 4 Ohm?
YES - Go to step 8.
NO - Faulty speaker(s).
8. Disconnect stereo amplifier connectors A (26P), B (14P), and C (23P).
9. Check the voltage between stereo amplifier connector B (14P) terminal No. 4 and body ground.
Is there battery voltage?
YES - Go to step 10.
NO - Repair an open in the wire between fuse No. 2 (30 A) in the passenger's under-dash fuse/relay box and stereo amplifier connector B (14P) terminal No.4.
10. Turn the ignition switch ON (II).
11. Check for voltage between stereo amplifier connector C (23P) terminal No. 19 and body ground.
Is there battery voltage?
YES - Go to step 12.
NO - Repair an open in the wire between the stereo amplifier connector C (23P) terminal No. 19 and audio unit connector A (20P) terminal No. 1.
12. Reconnect the stereo amplifier connectors A (20P), B (14P), and C (23P).
13. Check for voltage between stereo amplifier connector B (14P) terminal No. 3 and body ground.
Is there less than 0.1 V?
YES - Go to step 14.
NO - Repair an open in the wire between the stereo amplifier connector B (14P) terminal No. 3 and body ground (G652).
14. Disconnect stereo amplifier connectors B (14P), and C (25P).
15. Check the resistance of the stereo amplifier connectors B (14P) and C (23P) according to the table.
Is there more than 4 Ohms?
YES - Go to step 16.
NO - Repair an open in the wire between the stereo amplifier and the speaker.
16. Disconnect the speaker 2P connector.
17. Check for continuity between the stereo amplifier connector B (14P) and C (23P) terminals and body ground according to the table.
Is there continuity?
YES - Go to step 18.
NO - Repair a short in the wire between the stereo amplifier and the appropriate speaker.
18. Reconnect the 2P connector(s) to the speaker(s).
19. Disconnect audio unit connector A (20P) and audio unit connector B (32P).
20. Disconnect amplifier connector A (26P).
21. Check for continuity between audio unit connector A (20P) and body ground according to the table. Then check for continuity between the same terminals listed in the table and the audio unit connector A (20P) No. 14 terminal (the harness shield).
Is there continuity?
YES - Repair a short in the wire between the audio unit and the stereo amplifier or a short between the shield wires (replace the appropriate shielded harness).
NO - Go to step 22.
22. Check for continuity between audio unit connector B (32P) and body ground according to the table. Then check for continuity between the same terminals listed in the table and the audio unit connector B (32P) No. 19 terminal (the harness shield).
Is there continuity?
YES - Repair a short in the wire between the audio unit and the stereo amplifier or a short between the shield wires (replace the appropriate shielded harness).
NO - Go to step 23.
23. Check for continuity between audio unit connector B (32P) and body ground according to the table. Then check for continuity between the same terminals listed in the table and the audio unit connector B (32P) No. 3 terminal (the harness shield).
Is there continuity?
YES - Repair a short in the wire between the audio unit and the stereo amplifier or a short between the shield wires (replace the appropriate shielded harness).
NO - Go to step 24.
24. Check for continuity between audio unit connectors A (20P) and B (32P) and stereo amplifier connector A (26P) according to the table.
Is there continuity?
YES - Substitute a known-good audio unit and recheck. If the symptom/indication goes away, replace the original audio unit. If symptom is still present, substitute a known-good stereo amplifier and recheck. If the symptom/indication goes away, replace the original stereo amplifier.
NO - Repair an open in the appropriate wire between the audio unit and stereo amplifier.