Inspection Procedure 7: SD card cannot be read.

caution

Whenever the multivision display is replaced, ensure that the power supply circuit and the earthing circuit are normal. (Check that the voltage is 10 V or more.)

COMMENTS ON TROUBLE SYMPTOM

If no map data or audio file in a SD card can be read, the SD card or the multivision display may be defective.

PROBABLE CAUSES

Defective SD card
Malfunctions of multivision display

DIAGNOSIS PROCEDURE

STEP 1. Check if the error message is displayed on the monitor.

(Refer to

Q. Is the error message displayed on the monitor?

	YES : Refer to error message (refer to ), take necessary steps. If the SD card still cannot be read, go to Step 2.

	Go to Step 2.

STEP 2. Check the service data log for the MMCS service mode.

(1)Display the service data log for the MMCS service mode. (Refer to

(2)Check if the service data log for SD is displayed.

Q. Is the service data log displayed?

	Abnormalities relating to high or low temperature may be present. Check if the multivision display can output the sound at the operable temperature. If the SD card still cannot be read, go to Step 3.

	Go to Step 3.

STEP 3. Perform "SD Card Check" in the MMCS service mode.

(1)Display "SD Card Check" in the MMCS service mode. (Refer to

(2)Check if "Map Slot Check Results OK" is displayed.

(3)Check if "USER Slot Check Results OK" is displayed.

Q. Is the check result normal?

	Go to Step 4.

	Replace the SD card with a known good one. Then recheck whether the trouble is reproduced. If the trouble is still reproduced, go to Step 4.

STEP 4. Temporarily replace the multivision display, and check the trouble symptom.

Q. Is the check result normal?

	Replace the multivision display.

	Go to Step 1.