Inspection Procedure 7

INSPECTION PROCEDURE 7: GPS Signal Can Not Be Received.

CAUTION: Whenever the multivision display is replaced, ensure that the power supply circuit and the grounding circuit are normal. (Check that the voltage is 10 V or more.)

COMMENTS ON TROUBLE SYMPTOM
The GPS antenna or the multivision display may be defective.

PROBABLE CAUSES
- The GPS antenna may be defective
- The multivision display may be defective

DIAGNOSIS

STEP 1. Confirmation in MMCS service mode

Perform "Network/Connect Line Check" in the MMCS service mode to check that the communication and wire connection with the GPS antenna are OK. Service Mode

Q: Is the check result normal?

YES : Go to Step 2.

NO : Check that the GPS antenna is correctly connected to the multivision display, and go to Step 3.

STEP 2. Check for the vehicle's current position.

Check that the vehicle is parked on a well-ventilated place.

Q: Is the vehicle parked on a well-ventilated place?

YES : Go to Step 3.

NO : Move the vehicle to a well-ventilated area.

STEP 3. Confirming GPS signal reception

1. Start the multivision display
2. Press the [INFO] button
3. Select [Vehicle Position].
4. Wait for 5 minutes, and then check whether GPS signal can be received.

Q: Can GPS signal be received?

YES : The diagnosis is complete. (There is no failure)

NO : Go to Step 4.

STEP 4. Substitute a known good multivision display, and check the trouble symptom.

1. Temporarily replace the multivision display
2. Start the multivision display.
3. Press the [INFO] button
4. Select [Vehicle Position].
5. Check if the GPS signals are being received after 5 minutes have elapsed.

Q: Is the check result normal?

YES : Replace the multivision display.

NO : Replace the GPS antenna.