Rear Door Tweeter

REAR DOOR TWEETER


Description

The audio unit sends audio signals to the audio amp. The audio amp. amplifies the audio signals before sending them to the rear door tweeters using the audio signal circuits.




Diagnosis Procedure

1.TWEETER HARNESS CHECK
1. Disconnect audio amp. connectors M113 and suspect tweeter connector.
2. Check continuity between audio amp. harness connectors M113 (A) and suspect tweeter harness connector (B).










3. Check continuity between audio amp. harness connectors M113 (A) and ground.





Are the continuity test results as specified?
YES - GO TO 2.
NO -
- Check connector housings for disconnected or loose terminals.
- Repair harness or connector.
2.TWEETER SIGNAL CHECK





1. Connect audio amp. connectors and suspect tweeter connector.
2. Turn ignition switch to ACC.
3. Push "POWER" switch.
4. Check the signal between audio amp. harness connectors M113 terminals with CONSULT-III or oscilloscope.





Are audio signal voltage readings as specified?
YES - Replace suspect tweeter. Refer to Rear Door Speaker.
NO - GO TO 3.
3.PRE-AMP HARNESS CHECK
1. Disconnect audio unit connector M44 and audio amp. connector M113.
2. Check continuity between audio unit harness connector M44 (A) and audio amp. harness connector M113 (B).










3. Check continuity between audio unit harness connector M44 (A) and ground.





Are the continuity test results as specified?
YES - GO TO 4.
NO -
- Check connector housings for disconnected or loose terminals.
- Repair harness or connector.
4.PRE-AMP SIGNAL CHECK





1. Connect audio unit connector M44 and audio amp. connector
M113.
2. Turn ignition switch to ACC.
3. Push "POWER" switch.
4. Check the signal between audio unit harness connector M44 terminals with CONSULT-III or oscilloscope.





Is the audio signal voltage reading as specified?
YES - Replace audio amp.
NO - Replace audio unit. Refer to Premium Without Navigation.