Possible DTC

Sound jumps

Using the M-MDS

B1188:64

Without using M-MDS (On-board diagnostic test mode)

10:Er07

Possible cause

• Defective CD (e.g., cracked, badly bent, rough edges, scratch, dirty CD, condensation)

• Improper audio unit installation (e.g., rattle, loose)

• Inadequate tire pressure

• Audio unit malfunction

NOTE:

• The CD may be malfunctioning if the sound jumps on the certain CD only. Inspect the CD player/changer operation using the CD known to be good.

STEP

INSPECTION

ACTION

1

• Does the sound skip when pressing the SCAN button?

Yes

The system is normal. (Explain to the customer that the sound skips during SCAN.)

No

Go to the next step.

2

• Can the disc in which the malfunction occurs be specified?

Yes

The system is normal. (Explain to the customer that the cause is a disc that is damaged or dirty on the playback side, or warped.)

No

Go to the next step.

3

• Does the sound jump when the vehicle is stopped?

Yes

Go to Step 8.

No

Go to the next step.

4

• Drive the vehicle.

• Does the sound jump when driving over uneven surfaces?

Yes

Go to the next step.

No

Go to Step 8.

5

• Is the audio unit installed securely?

Yes

Go to the next step.

No

Install the audio unit securely.

6

• Inspect the tire pressure.

• Is the tire pressure normal?

Yes

Replace the audio unit.

(See AUDIO UNIT REMOVAL/INSTALLATION.)

No

Go to the next step.

7

• Adjust the tire pressure within specification.

• Does the sound jump when driving the vehicle?

Yes

Replace the audio unit.

(See AUDIO UNIT REMOVAL/INSTALLATION.)

No

Audio system is normal. Explain repairs to the customers.

8

• Replace the CD known to be good.

• Does the sound jump when driving the vehicle?

Yes

Replace the audio unit.

(See AUDIO UNIT REMOVAL/INSTALLATION.)

No

Audio system is normal. Explain to the customer that the CD is malfunctioning.