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Toyota Corolla Repair Manual: Sound quality is bad only when cd is played(volume is too low)

Toyota Corolla Repair Manual / Diagnostics / Audio system / Sound quality is bad only when cd is played(volume is too low)

Inspection procedure

1 Replace cd with another and recheck

  1. Replace the cd with another and recheck.
  1.  Check the installation condition of the radio receiver assembly.

    Standard: malfunction disappear.

Check and replace radio receiver assy

Check and replace radio receiver assy

Cd cannot be taken out
Wiring diagram Inspection procedure 1 Check if radio auto–search functions properly Check if the radio auto–search function properly.  Perform the auto–research of the radio and check ...

Cd sound skips
Inspection procedure 1 Disc cleaning Disk cleaning ) if the disk gets dirty, clean the disk by wiping the surface from the center to outside in the radial directions with a soft clo ...

Other materials:

Automatic transaxle assy (atm)
Precaution  The automatic transaxle is composed of highly precision–finished parts, necessitating careful inspection before reassembly because even a small nick could cause fluid leakage or affect the performance. The instructions here are organized so that you work on only one ...

Cassette tape cannot be ejected
Wiring diagram Wiring diagram 1 Check if radio auto–search functions properly Check if the radio auto–search function properly.  Perform the auto–research of the radio and check that the operation is normal. Standard: malfunction disappear. 2 Press ”eject” and check oper ...

How to proceed with troubleshooting
1 Vehicle brought to workshop 2 Customer problem analysis 3 Check and clear dtcs and freeze frame data 4 Problem symptom confirmation Symptom does not occur: go to step 5 Symptom occurs: go to step 6 5 Symptom simulation 6 Dtc check There is no output: go to step 7 There is outp ...

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