Toyota Tacoma manuals

Toyota Corolla Repair Manual: No sound is heard from speaker in all modes

Toyota Corolla Repair Manual / Diagnostics / Audio system / No sound is heard from speaker in all modes

Wiring diagram

Inspection procedure

Inspection procedure

1 Check lcd (liquid crystal display) for lighting

  1. Lcd illumination check
  1.  turn the ignition switch acc.
  2.  Turn the radio receiver assembly on.

    Standard: lcd illumination of the radio receiver assembly light.

2 Control fader and adjust sound balance

2 Control fader and adjust sound balance

  1. Fader and balance adjustment
  1.  operate the radio receiver assembly to adjust the fader and the balance to identify the speaker that does not sound.

3 Inspect front no.1 Speaker assy

3 Inspect front no.1 Speaker assy

  1. Preparation for check
  1.  disconnect the connector of the speaker.
  1.  resistance check
  1.  check the resistance between the terminals of the speaker.

Notice

: the speaker should not be removed for checking.

Standard value: 4 Ω

4 Inspect front no.2 Speaker assy

4 Inspect front no.2 Speaker assy

  1. Check that malfunction disappear when a known good speaker is installed.

    Standard: malfunction disappear.

Hint

: connect the all connectors of speakers.

5 Inspect rear speaker assy

5 Inspect rear speaker assy

  1. Preparation for check
  1.  disconnect the connector of the speaker.
  1.  resistance check
  1.  check the resistance between the terminals of the speaker.

Notice

: the speaker should not be removed for checking.

Standard value: 6 w

6 Check harness and connector(between radio receiver assy and

6 Check harness and connector(between radio receiver assy and speaker)

Check and replace radio receiver assy

Check and replace radio receiver assy

7 Inspect radio receiver assy(+b, acc, gnd)

  1. Check that the continuity between terminals at each condition, as shown in the chart.

Standard:

  1. Check that the voltage between terminals at each condition, as shown in the chart.

Standard:

Repair or replace harness or connector

Repair or replace harness or connector

Turning on light switch does not light up night time illumination of radio receiver
Wiring diagram Inspection procedure 1 Inspect radio receiver assy(ill+, ill) Check that the voltage between terminals at each condition, as shown in the chart. Standard: Rep ...

Sound quality is bad in all modes (volume is too low)
Wiring diagram Inspection procedure 1 Adjust sound quality Adjust the sound quality.  Operate the radio receiver assy to adjust the sound quality. Standard: malfunction disappear. ...

Other materials:

Before driving
Floor mat Use only floor mats designed specifically for vehicles of the same model and model year as your vehicle. Fix them securely in place onto the carpet. 1 Insert the retaining hooks (clips) into the floor mat eyelets. 2 Turn the upper knob of each retaining hook (clip) to secure the flo ...

Malfunction in clock
Wiring diagram Inspection procedure 1 Inspect fuse Check the continuity in cig fuse.  check the continuity in dome fuse. 2 Inspect harness or connector Check voltage.  Remove the clock assy with connector still connected.  Measure voltage between ter ...

Stopping the engine
1 Stop the vehicle. 2 Continuously variable transmission: Shift the shift lever to P. Manual transmission: Shift the shift lever to N. 3 Set the parking brake. 4 Press the engine switch. 5 Vehicles without a multi-information display: Release the brake pedal (continuously variable transmission ...

2011-2019 Copyright www.tcorolla.net