Inspection Procedure 10

INSPECTION PROCEDURE 10: The touch panel operation is ineffective.

CAUTION: Before replacing the navigation unit or multi-center display, ensure that the power supply circuit and the ground circuit are normal. (Check that the voltage is 10 V or more.)

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 navigation unit may be defective

DIAGNOSIS

STEP 1. Using the service mode function, check that the touch panel operates on the whole surface.

1. Display the TOUCH SWITCH CHECK.
2. Check if the coordinates of the touched point are displayed normally.

Q: Is check result normal?

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 : Replace the multi-center display.

STEP 3. Check the DIN cable connector shape and engagement between the navigation unit and the multi-center display.

Q: Is check result normal?

YES : Go to Step 4.

NO : Replace the DIN cable.

STEP 4. DIN cable inspection between the navigation unit and the multi-center display

Q: Is the DIN cable between the navigation unit and the multi-center display normal?

YES : Replace the DIN cable.

NO : Go to Step 5.

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

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

YES : Replace the navigation unit.

NO : Replace the DIN cable.