VEHICLE HAS POOR WAVE SIGNAL RECEPTION SENSITIVITY [TELEMATICS COMMUNICATION SYSTEM (TYPE-B)]

id160305071600

Note

• Before starting the symptom troubleshooting, verify the [Troubleshooting Procedure for Telematics Communication System].

(See FOREWORD [TELEMATICS COMMUNICATION SYSTEM (TYPE-B)].)

Outline

Description

•  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.

Possible cause

•  Connector or terminal malfunction of the following parts:

―  Telematics communication unit

―  TEL antenna No.1

―  TEL antenna No.2

•  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

Diagnostic Procedure

Step

Inspection

Results

Action

1

VERIFY ALL SYSTEM DTCs

•  Perform the DTC inspection.
Refer to the [DTC INSPECTION] in the workshop manual.

•  Are any DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

No

Go to the next step.

2

INSPECT TELEMATICS COMMUNICATION UNIT, TEL ANTENNA NO.1, AND TEL ANTENNA NO.2 CONNECTORS FOR MALFUNCTION

•  Inspect the applicable connector and terminal.
Refer to the [CONNECTOR INSPECTION] in the workshop manual.

•  Are the connector and terminal normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

3

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.
Refer to the [CIRCUIT INSPECTION] in the workshop manual.

•  Are the connector and terminal normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

4

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.
Refer to the [CIRCUIT INSPECTION] in the workshop manual.

•  Are the connector and terminal normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

Repair completion verification1

VERIFY THAT VEHICLE IS REPAIRED

•  Install/connect the part removed/disconnected during the troubleshooting procedure.

•  Has the malfunction symptom been eliminated?

Yes

Complete the symptom troubleshooting. (Explain contents of repair to customer)

No

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.
Refer to the [TEL ANTENNA REMOVAL/INSTALLATION] in the workshop manual.

If the [radio reception status display for the telematics communication unit] does not indicate out of range:

•  Go to the next step.

Repair completion verification2

VERIFY THAT VEHICLE IS REPAIRED

•  Install/connect the part removed/disconnected during the troubleshooting procedure.

•  Has the malfunction symptom been eliminated?

Yes

Complete the symptom troubleshooting. (Explain contents of repair to customer)

No

Replace the TEL antenna No.1, then go to the next step.

Refer to the [TEL ANTENNA REMOVAL/INSTALLATION] in the workshop manual.

Repair completion verification3

VERIFY THAT VEHICLE IS REPAIRED

•  Install/connect the part removed/disconnected during the troubleshooting procedure.

•  Has the malfunction symptom been eliminated?

Yes

Complete the symptom troubleshooting. (Explain contents of repair to customer)

No

Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.

Refer to the [CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [TYPE-B]] in the workshop manual.

If the CAN communication is normal, perform the diagnosis from Step 1.

•  If the malfunction is not resolved, replace the telematics communication unit.
Refer to the [TELEMATICS COMMUNICATION UNIT REMOVAL/INSTALLATION] in the workshop manual.

Description	• 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.
Possible cause	• Connector or terminal malfunction of the following parts: ― Telematics communication unit ― TEL antenna No.1 ― TEL antenna No.2 • 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

Step	Inspection	Results	Action
1	VERIFY ALL SYSTEM DTCs • Perform the DTC inspection. Refer to the [DTC INSPECTION] in the workshop manual. • Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
1		No	Go to the next step.
2	INSPECT TELEMATICS COMMUNICATION UNIT, TEL ANTENNA NO.1, AND TEL ANTENNA NO.2 CONNECTORS FOR MALFUNCTION • Inspect the applicable connector and terminal. Refer to the [CONNECTOR INSPECTION] in the workshop manual. • Are the connector and terminal normal?	Yes	Go to the next step.
2		No	Repair or replace the malfunctioning location and perform the repair completion verification.
3	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. Refer to the [CIRCUIT INSPECTION] in the workshop manual. • Are the connector and terminal normal?	Yes	Go to the next step.
3		No	Repair or replace the malfunctioning location and perform the repair completion verification.
4	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. Refer to the [CIRCUIT INSPECTION] in the workshop manual. • Are the connector and terminal normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification.
Repair completion verification1	VERIFY THAT VEHICLE IS REPAIRED • Install/connect the part removed/disconnected during the troubleshooting procedure. • Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting. (Explain contents of repair to customer)
Repair completion verification1		No	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. Refer to the [TEL ANTENNA REMOVAL/INSTALLATION] in the workshop manual. If the [radio reception status display for the telematics communication unit] does not indicate out of range: • Go to the next step.
Repair completion verification2	VERIFY THAT VEHICLE IS REPAIRED • Install/connect the part removed/disconnected during the troubleshooting procedure. • Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting. (Explain contents of repair to customer)
Repair completion verification2		No	Replace the TEL antenna No.1, then go to the next step. Refer to the [TEL ANTENNA REMOVAL/INSTALLATION] in the workshop manual.
Repair completion verification3	VERIFY THAT VEHICLE IS REPAIRED • Install/connect the part removed/disconnected during the troubleshooting procedure. • Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting. (Explain contents of repair to customer)
Repair completion verification3		No	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. Refer to the [CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [TYPE-B]] in the workshop manual. If the CAN communication is normal, perform the diagnosis from Step 1. • If the malfunction is not resolved, replace the telematics communication unit. Refer to the [TELEMATICS COMMUNICATION UNIT REMOVAL/INSTALLATION] in the workshop manual.