Stereo Amplifier Has No Sound
Stereo amplifier has no sound1. Turn the ignition switch OFF.
2. Measure the voltage between stereo amplifier connector A (14P) terminal A11 and body ground.
Is there battery voltage?
YES - Go to step 3.
NO - Repair open in the wire between No. 5 (20 A) fuse in the under-dash fuse/relay box and the stereo amplifier.
3. Measure the voltage between stereo amplifier connector A (14P) terminal A10 and body ground.
Is there less than 0.1 V?
YES - Go to step 4.
NO - Repair open in the wire between the stereo amplifier and G506. If the wire is OK, repair loose or poor connection at G506.
4. Disconnect audio unit connector C (40P) and stereo amplifier connector B (20P).
5. Check for continuity between the stereo amplifier connector B (20P) and the audio unit connector C (40P) according to the table.
Is there continuity?
YES - Go to step 6.
NO - Repair open in the wire between the stereo amplifier and the audio unit.
6. Check for continuity between body ground and stereo amplifier connector B (20P) terminals according to the table.
Is there continuity?
YES - Repair short to ground in the wire between the audio unit and the stereo amplifier.
NO - Go to step 7.
7. Substitute a known-good stereo amplifier, then reconnect all connectors and do the speaker check mode in the self-diagnosis.
Is the sound normal?
YES - Replace the original stereo amplifier.
NO - Replace the audio unit.