Inspection Procedure 5
Inspection Procedure 5: The screen is not normal in the navigation mode. (The displayed position of the vehicle mark deviates.)
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.)
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
- Malfunctions of GPS antenna
- Malfunctions of combination meter
- Malfunctions of multivision display
- 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. (Refer to Without Manufacture's Scan Tool (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."(Refer to 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-203 and multivision display connector C-118 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q. Is combination meter connector C-203 or multivision display connector C-118 in good condition?
YES Go to Step 5.
NO Repair or replace the damaged component(s). Harness Connector Inspection.
STEP 5. Check the wiring harness between combination meter connector C-203 (terminal 20) and multivision display connector C-118 (terminal 13).
- Check the communication lines for open circuit and short circuit.
NOTE:
Also check intermediate connector C-104 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-104 is damaged, repair or replace the connector as described in Harness Connector Inspection Harness Connector Inspection.
Q. Is the wiring harness between combination meter connector C-203 (terminal 20) and multivision display connector C-118 (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. Substitute a known good multivision display, and check the trouble symptom.
Check whether the navigation screen is normal.
Q. Is the navigation screen normal?
YES Replace the multivision display.
NO Replace the combination meter.