Inspection Procedure 5
INSPECTION PROCEDURE 5: The Screen Is Not Normal In The Navigation Mode. (The Own Vehicle Mark Is Dislocated.)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:
COMMENTS ON TROUBLE SYMPTOM
There is a failure in the wiring harness between the combination meter and the multivision display, the GPS antenna, the respective connector(s), the combination meter or the multivision display.
PROBABLE CAUSES
- The GPS antenna may be defective
- The combination meter may be defective
- The multivision display may be defective
- Damaged harness wires and connectors
DIAGNOSIS
Required Special Tools:
- MB991223: Harness Set
- MB992006: Extra Fine Probe
STEP 1. Confirmation in MMCS service mode
Check the items below in the MMCS service mode. Service Mode
- Perform "Network/Connect Line Check" in the MMCS service mode to check that the communication and wire connection with the GPS are in good condition.
- Perform "Vehicle Signal Check", and then check the status of the vehicle speed signal.
- Perform "Sensor Check", and then check the status of the vehicle speed sensor and the gyro sensor.
Q: Is the check result normal?
YES (OK for all) : Go to Step 6.
NO [GPS is not OK] : Go to Step 2.
NO [The vehicle speed sensor is not OK, or vehicle speed pulse does not increase after starting from a standstill] : Go to Step 3.
NO [Gyro sensor is not OK] : Go to Step 6.
STEP 2. GPS reception check
1. Start the multivision display
2. Press the [INFO] button
3. Select [Vehicle Position].
4. Check if the GPS signals are received.
Q: Is the check result normal?
YES : Go to Step 6.
NO : Perform Inspection procedure 7 "GPS signal cannot be received." Inspection Procedure 7. Then, go to Step 6.
STEP 3. Check the speedometer.
Check whether the speedometer works normally.
Q: Does the speedometer work normally?
YES : Go to Step 4.
NO : Diagnose the combination meter (Refer to Combination meter - Diagnosis). Symptom Chart
STEP 4. Check combination meter connector C-04 and multivision display connector C-13 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-13 in good condition?
YES : Go to Step 5.
NO : Repair or replace the damaged component.
STEP 5. Check the wiring harness between combination meter connector C-04 (terminal 20) and multivision display connector C-13 (terminal 13).
- Check the communication lines for open circuit and short circuit.
NOTE: Also check intermediate connector C-108 and joint connector C-103 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-108 and joint connector C-103 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-13 (terminal 13) in good condition?
YES : Go to Step 6.
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 6. Retest the system.
Drive the vehicle for some time with the GPS signals being received, and check if the own vehicle mark is dislocated.
Q: Is the check result normal?
YES : The trouble can be an intermittent malfunction.
NO : Replace the multivision display.