Inspection Procedure 4

Inspection Procedure 4: The navigation system can be operated while the vehicle is driven.

CAUTION: Before replacing the multivision display, ensure that the power supply circuit, the ground circuit, and the communication circuit are normal. (Check that the voltage is 10 V or more.)

Multivision Display Communication Circuit:

TECHNICAL DESCRIPTION (COMMENT)

There is a failure in the wiring harness between the combination meter and the multivision display, the respective connector(s), the combination meter or the multivision display.

TROUBLESHOOTING HINTS

- Combination meter may be defective
- Multivision display may be defective
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

DIAGNOSIS

Required Special Tools:
- MB991223: Harness Set
- MB992006: Extra Fine Probe

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. Service Mode

Q: Is the vehicle speed signal transmitted normally?

YES : Replace the multivision display.

NO : Go to Step 2.

STEP 2. Check the speed meter.

Check whether the speed meter works normally. Speedometer Check

Q: Does the speed meter work normally?

YES : Go to Step 3.

NO : Diagnose the combination meter (Refer to Combination meter - Troubleshooting). Symptom Chart

STEP 3. Check combination meter connector C-04 and multivision display connector C-14 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is combination meter connector C-04 and multivision display connector C-14 in good condition?

YES : Go to Step 4.

NO : Repair or replace the damaged component.

STEP 4. Check the wiring harness between combination meter connector C-04 (terminal 20) and multivision display connector C-14 (terminal 13).

- Check the communication line for open circuit and short circuit.

NOTE: Also check joint connector C-03 and intermediate connector C-105 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If joint connector C-03 or intermediate connector C-105 is damaged, repair or replace the connector.

Q: Is the wiring harness between combination meter connector C-04 (terminal 20) and multivision display connector C-14 (terminal 13) in good condition?

YES : Go to Step 5.

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.

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?

YES : Replace the multivision display.

NO : Replace the combination meter.