Inspection Procedure 10

INSPECTION PROCEDURE 10: The Touch Panel Operation Is Ineffective.






TROUBLESHOOTING HINTS
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
- The DIN cable may be defective
- The multi-center display may be defective
- The radio, CD player and CD changer may be defective
- The navigation unit may be defective

DIAGNOSIS

STEP 1. Using the multi-center display service function, check that the touch panel operates on the whole surface.

Q: When the multi-center display service function is used, does the touch panel operate on the whole surface?

YES : Go to Step 2.

NO : Replace the multi-center display.

STEP 2. Check if the touch panel is ineffective only with the navigation operation.

Q: Is the touch panel ineffective only with the navigation operation?

YES : Go to Step 3.

NO : Go to Step 6.

STEP 3. Check the DIN cable connector shape and engagement between the navigation unit and the radio, the CD player, and CD changer.

Q: Is there any abnormality to the DIN cable connector shape and engagement between the navigation unit and the radio, CD player, and CD changer?

YES : Go to Step 4.

NO : Replace the DIN cable, the navigation unit, or the radio, CD player and CD changer. Check that the touch panel operation is possible.

STEP 4. DIN cable inspection between the navigation unit and the radio, CD player, and CD changer

Q: Is the DIN cable between the navigation unit and the radio, CD player, and CD changer normal?

YES : Go to Step 5.

NO : Replace the DIN cable. Check that the touch panel operation is possible.

STEP 5. Temporarily replace the navigation unit, and check that the touch panel operation is possible.

Q: When the navigation unit is temporarily replaced, is the touch panel operation possible?

YES : Replace the navigation unit. Check that the touch panel operation is possible.

NO : Replace the radio, and the CD player and CD changer. Check that the touch panel operation is possible.

STEP 6. Check multi-center display connector C-31 and radio, CD player and CD changer connector C-134 for loose, corroded or damaged terminals, or terminals pushed back in the connector.






Q: Are multi-center display connector C-31 and radio, CD player and CD changer connector C-134 in good condition?

YES : Go to Step 7.

NO : Repair the damaged parts. Then, check that the touch panel operation is possible.

STEP 7. Check the wiring harness between multi-center display connector C-31 (terminal 7, 8, 17) and radio, CD player and CD changer connector C-134 (terminal 27, 28, 39).






Q: Are the wiring harness between multi-center display connector C-31 (terminal 7, 8, 17) and radio, CD player and CD changer connector C-134 (terminal 27, 28, 39) in good condition?

YES : Go to Step 8.

NO : The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Check that the touch panel operation is possible.

STEP 8. Temporarily replace the radio, CD player, and CD changer, and check whether the touch panel operation is possible.

Q: When the radio, CD player, and CD changer is temporarily replaced, is the touch panel operation possible?

YES : Replace the radio, and the CD player and CD changer. Check that the touch panel operation is possible.

NO : Replace the multi-center display. Check that the touch panel operation is possible.