VEHICLE HAS POOR WAVE SIGNAL RECEPTION SENSITIVITY [TELEMATICS COMMUNICATION SYSTEM]
VEHICLE HAS POOR WAVE SIGNAL RECEPTION SENSITIVITY [TELEMATICS COMMUNICATION SYSTEM]
SM2763802
id0903q3071600
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Note
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• Before starting the symptom troubleshooting, verify the [Troubleshooting Procedure for Telematics Communication System]. (See FOREWORD [TELEMATICS COMMUNICATION SYSTEM].)
Outline
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Description
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• The out of range or a low radio wave strength level is displayed even though the vehicle is in a good radio signal reception area.
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Possible cause
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• Connector or terminal malfunction of the following parts:
• Short to power supply, short to ground, or open circuit in TEL antenna No.1 signal circuit
• Short to power supply, short to ground, or open circuit in TEL antenna No.2 signal circuit
• TEL antenna No.1 malfunction
• TEL antenna No.2 malfunction
• Telematics communication unit malfunction
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Diagnostic Procedure
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Step |
Inspection |
Results |
Action |
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1
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VERIFY ALL SYSTEM DTCs
• Perform the DTC inspection. (See DTC INSPECTION.)
• Are any DTCs displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
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No
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Go to the next step.
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2
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INSPECT TELEMATICS COMMUNICATION UNIT, TEL ANTENNA NO.1, AND TEL ANTENNA NO.2 CONNECTORS FOR MALFUNCTION
• Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.)
• Are the connector and terminal normal?
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Yes
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Go to the next step.
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No
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Repair or replace the malfunctioning location and perform the repair completion verification.
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3
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INSPECT TEL ANTENNA NO.1 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY, SHORT TO GROUND, AND OPEN CIRCUIT
• Inspect the signal circuit for a short to power supply, short to ground, and an open circuit. (See CIRCUIT INSPECTION.)
• Are the connector and terminal normal?
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Yes
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Go to the next step.
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No
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Repair or replace the malfunctioning location and perform the repair completion verification.
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4
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INSPECT TEL ANTENNA NO.2 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY, SHORT TO GROUND, AND OPEN CIRCUIT
• Inspect the signal circuit for a short to power supply, short to ground, and an open circuit. (See CIRCUIT INSPECTION.)
• Are the connector and terminal normal?
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Yes
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Go to the next step.
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No
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Repair or replace the malfunctioning location and perform the repair completion verification.
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Repair completion verification1
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VERIFY THAT VEHICLE IS REPAIRED
• Install/connect the part removed/disconnected during the troubleshooting procedure.
• Has the malfunction symptom been eliminated?
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Yes
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Complete the symptom troubleshooting. (Explain contents of repair to customer)
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No
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Disconnect the TEL antenna No.1 connector and verify the [radio reception status display for the telematics communication unit].
If the [radio reception status display for the telematics communication unit] indicates out of range:
• Replace the TEL antenna No.2, then go to the next step. (See TEL ANTENNA REMOVAL/INSTALLATION [(US)].)
If the [radio reception status display for the telematics communication unit] does not indicate out of range:
• Go to the next step.
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Repair completion verification2
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VERIFY THAT VEHICLE IS REPAIRED
• Install/connect the part removed/disconnected during the troubleshooting procedure.
• Has the malfunction symptom been eliminated?
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Yes
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Complete the symptom troubleshooting. (Explain contents of repair to customer)
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No
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Replace the TEL antenna No.1, then go to the next step.
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Repair completion verification3
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VERIFY THAT VEHICLE IS REPAIRED
• Install/connect the part removed/disconnected during the troubleshooting procedure.
• Has the malfunction symptom been eliminated?
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Yes
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Complete the symptom troubleshooting. (Explain contents of repair to customer)
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No
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Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
If the CAN communication is normal, perform the diagnosis from Step 1.
• If the malfunction is not resolved, replace the telematics communication unit. (See TELEMATICS COMMUNICATION UNIT REMOVAL/INSTALLATION .)
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