Toyota Tundra Service Manual: No Sound can be Heard from Speakers

PROCEDURE

1.

CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

(a) In sound output setting mode, set volume, fader and balance to the initial values and check that the sound is normal.

OK:

Audio and visual system returns to normal.

OK

END (SETTINGS ARE DEFECTIVE)

NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Microphone Circuit between Microphone and Radio Receiver

    Noise Occurs or Sound Skips when Portable Player Plays

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    DESCRIPTION There may be a short circuit between the CAN main bus lines and/or CAN branch lines when the resistance between terminals 22 (CA2H) and 7 (CA2L) of the central gateway ECU (network gateway ECU) is below 54 Ω. Symptom Trouble Area *1: for 4WD *2: w/ Trailer Brake Control System Resistanc ...

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