Inspection Procedure 4: The Navigation System can be Operated while the Vehicle is Driven.


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



PROBABLE CAUSES



  • Malfunctions of combination meter
  • Malfunctions of multivision display
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Perform "Vehicle Signal Check" in the MMCS service mode.
Perform "Vehicle Signal Check" in the MMCS service mode to check whether vehicle speed signal is normal (Refer to ).

Q. Is the vehicle speed signal transmitted normally?
Replace the multivision display.
Go to Step 2.

STEP 2. Check the speedometer.
Check whether the speedometer works normally.

Q. Does the speedometer work normally?
Go to Step 3.
Diagnose the combination meter (Refer to Combination meter - Troubleshooting ).

STEP 3. Connector check: C-01 combination meter connector, C-144 multivision display connector

Q. Is the check result normal?
Go to Step 4.
Repair the defective connector.

STEP 4. Check the wire harness between C-01 combination meter connector terminal No.20 and C-144 multivision display connector terminal No.13.

  • Check the communication line for open circuit or short cuircuit.
note Prior to the wiring harness inspection, check intermediate connector C-139,joint connector C-39 and repair if necessary.

Q. Is the check result normal?
Go to Step 5.
Repair the wiring harness.

STEP 5. Substitute a known good multivision display, and check the trouble symptom.
Check that no menus are active during driving.

Q. Is the check result normal?
Replace the multivision display.
Replace the combination meter.