Pre-Check

PRE-CHECK

1. DIAGNOSIS CHECK

a. Starting Diagnosis Mode (All elements are lighting in SW check mode).




1. Turn off the audio system and turn the IG switch to ACC. While pressing the preset switches "1" and "6" at the same time, press "DISC" 3 times.

2. Reference:
- When the system enters the Diagnosis Mode, a beep sound is emitted 3 times and all the elements come on in SW check mode.
- It may take about 40 sec. to complete the check.
- Turn all the elements in the LCD on.
- When pressing the switch, confirm a beep sound is emitted.
- Pressing the "SEEK TRACK UP" button switches the display to "Service Check Screen".

b. Service Check Screen.







Reference
- In the service check mode, the system check and the diagnosis memory check are performed, and the check results are displayed in ascending order of the device codes (physical address).

c. Finishing Diagnosis Mode.
Press "DISC" button for 2 sec. or more, or turn the IG switch OFF.

d. Service Check Mode Result Display (for checking the current and the past system conditions).




1. Press the "SEEK TRACK" switch to see the check result of each device.




2. Check Result Display.




3. To perform the Service Check again, press the preset switch "1".

e. Detail information Mode (when displaying the troubled devices DTC)
1. With "CHEC" or "ECHN" being display, press the preset switch "2" to go to the detail information mode.




2. Press the "SEEK TRACK" switch to display "System Check Result (SYS)" and "Diagnosis Memory Response (CODE)".




3. Displayed Items in Detail Information Mode
4. Check the trouble area referring to the DTC list.
5. To return to the service check mode, press the preset switch "3".

f. Clearing Individual DTC Memory (when clearing the memory of DTC detected in the past individually)
Press the preset switch "5" for 2 sec. or more while the "ECHN" is displayed in the service check mode or during the detail information mode.

HINT:
- A beep sound is given once when the DTC memory is completely cleared.
- When DTC memory is cleared, only the component code (physical address) is displayed for the target component.
- To check DTC, press the preset switch "1" and perform the service check again.

g. Clearance of all DTC memory (when clearing all the memory of DTC detected in the past)
1. Start the diagnosis mode after repairing the trouble area.
2. Press the preset switch "5" for 2 sec. or more.
("CLR" is displayed at this time.)

HINT:
- A beep sound is given once when the DTC memory is completely cleared.
- When DTC memory for all the devices is cleared, only the component codes (physical address) are displayed.

3. Press the preset switch "1" to perform the service check again, and check that no DTC is displayed for all the component codes (physical address).

2. IDENTIFICATION OF NOISE SOURCE




Identify the conditions under which the noise occurs, and check the noise filter on the relevant part.

- First ensure that the noise is not coming from the outside. Failure to do so makes noise source detection difficult and may lead to a misdiagnosis.

- Noise should be removed in descending order of loudness.

- Tuning the radio so that no station is received makes the noise more noticeable, making the recognition of the phenomenon easier.