Rear Door Tweeter

REAR DOOR TWEETER

Description

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


Diagnosis Procedure

Regarding Wiring Diagram information, Crew Cab.

1. CONNECTOR CHECK

Check the audio unit, audio amplifier and speaker connectors for the following:
- Proper connection
- Damage
- Disconnected or loose terminals
Is the inspection result normal?
YES- GO TO 2.
NO- Repair the terminal and connector.

2. SPEAKER HARNESS CHECK






1.Disconnect audio amplifier connectors B159 and suspect speaker connector.
2.Check continuity between audio amplifier harness connectors
B159 (A) and suspect speaker harness connector (B).





3.Check continuity between audio amp. harness connectors B159
(A) and ground.





Are the continuity test results as specified?
YES- GO TO 3
NO- Repair or replace harness or connector.

3. SPEAKER SIGNAL CHECK






1.Connect audio amplifier connectors and suspect speaker connector.
2.Turn ignition switch to ACC.
3.Push audio unit "POWER" switch.
4.Check the signal between audio amplifier harness connectors
B159 terminals with CONSULT or oscilloscope.





Are audio signal voltage readings as specified?
YES- Replace suspect speaker. Rear Door Tweeter.
NO- GO TO 4

4. PRE-AUDIO AMPLIFIER HARNESS CHECK






1.Disconnect audio unit connector M66 and audio amplifier connector B159.
2.Check continuity between audio unit harness connector M66 (A)
and audio amplifier harness connector B159 (B).





3.Check continuity between audio unit harness connector M66 (A)
and ground.





Are the continuity test results as specified?
YES- GO TO 5
NO- Repair or replace harness or connector.

5. PRE-AUDIO AMPLIFIER SIGNAL CHECK






1.Connect audio unit connector M66 and audio amplifier connector B159.
2.Turn ignition switch to ACC.
3.Push audio unit "POWER" switch.
4.Check the signal between audio unit harness connector M66
terminals with CONSULT or oscilloscope.





Is the audio signal voltage reading as specified?
YES- Replace audio amplifier Service and Repair.
NO- Replace audio unit. Premium Audio (Crew Cab).