DTC B1A21:13 [CONNECTIVITY MASTER UNIT (TYPE-B)]

id1602a9005900

With FM Antenna Amplifier

Outline

System malfunction location

FM antenna amplifier signal circuit malfunction

Detection condition

•  The remote tuner (RT) detects an open circuit in the FM antenna amplifier signal circuit or a disconnection with the FM antenna amplifier for 2 s.

Fail-safe

Not applicable

Possible cause

•  FM antenna amplifier connector or terminal malfunction

•  Remote tuner (RT) connector or terminal malfunction

•  FM antenna amplifier feeder malfunction

―  Open circuit in FM antenna amplifier signal circuit

•  FM antenna amplifier malfunction

•  Remote tuner (RT) malfunction

System malfunction location	FM antenna amplifier signal circuit malfunction
Detection condition	• The remote tuner (RT) detects an open circuit in the FM antenna amplifier signal circuit or a disconnection with the FM antenna amplifier for 2 s.
Fail-safe	Not applicable
Possible cause	• FM antenna amplifier connector or terminal malfunction • Remote tuner (RT) connector or terminal malfunction • FM antenna amplifier feeder malfunction ― Open circuit in FM antenna amplifier signal circuit • FM antenna amplifier malfunction • Remote tuner (RT) malfunction

Diagnostic Procedure

Step

Inspection

Results

Action

1

INSPECT CONNECTIVITY MASTER UNIT (CMU) AND REMOTE TUNER (RT) FOR MALFUNCTION

•  Perform the DTC inspection for the connectivity master unit (CMU).
(Refer to the [DTC INSPECTION] in the workshop manual)

•  Are any of the following DTCs displayed?

―  DTC related to malfunction in CMU

―  B1A33:49 for CMU

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [CONNECTIVITY MASTER UNIT (TYPE-B) (E)].)

No

Go to the next step.

2

INSPECT FM ANTENNA AMPLIFIER CONNECTOR 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 REMOTE TUNER (RT) CONNECTOR 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.

4

INSPECT FM ANTENNA AMPLIFIER SIGNAL CIRCUIT FOR OPEN CIRCUIT

•  Inspect the applicable circuit for an open circuit.
(Refer to the [CIRCUIT INSPECTION] in the workshop manual)

•  Is the circuit normal?

Yes

Replace the antenna amplifier and perform the repair completion verification.

(Refer to the [ANTENNA AMPLIFIER REMOVAL/INSTALLATION] in the workshop manual)

No

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

Repair completion verification 1

VERIFY THAT VEHICLE IS REPAIRED

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

•  Clear the DTC recorded in the memory.
(Refer to the [CLEARING DTC] in the workshop manual)

•  Switch the ignition ON (engine off or on) and wait for 2 s or more.

•  Perform the DTC inspection for the connectivity master unit (CMU).
(Refer to the [DTC INSPECTION] in the workshop manual)

•  Is the same Pending DTC present?

Yes

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] in the workshop manual)

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

•  If the malfunction recurs, replace the remote tuner (RT), then go to the next step.
(Refer to the [REMOTE TUNER (RT) REMOVAL/INSTALLATION] in the workshop manual)

No

Go to the next step.

Repair completion verification 2

VERIFY IF OTHER DTCs ARE DISPLAYED

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

•  Is a DTC displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

No

DTC troubleshooting completed.

Step	Inspection	Results	Action
1	INSPECT CONNECTIVITY MASTER UNIT (CMU) AND REMOTE TUNER (RT) FOR MALFUNCTION • Perform the DTC inspection for the connectivity master unit (CMU). (Refer to the [DTC INSPECTION] in the workshop manual) • Are any of the following DTCs displayed? ― DTC related to malfunction in CMU ― B1A33:49 for CMU	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [CONNECTIVITY MASTER UNIT (TYPE-B) (E)].)
1		No	Go to the next step.
2	INSPECT FM ANTENNA AMPLIFIER CONNECTOR 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 REMOTE TUNER (RT) CONNECTOR 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.
3		No	Repair or replace the malfunctioning location and perform the repair completion verification.
4	INSPECT FM ANTENNA AMPLIFIER SIGNAL CIRCUIT FOR OPEN CIRCUIT • Inspect the applicable circuit for an open circuit. (Refer to the [CIRCUIT INSPECTION] in the workshop manual) • Is the circuit normal?	Yes	Replace the antenna amplifier and perform the repair completion verification. (Refer to the [ANTENNA AMPLIFIER REMOVAL/INSTALLATION] in the workshop manual)
4		No	Repair or replace the malfunctioning location and perform the repair completion verification.
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED • Install/connect the part removed/disconnected during the troubleshooting procedure. • Clear the DTC recorded in the memory. (Refer to the [CLEARING DTC] in the workshop manual) • Switch the ignition ON (engine off or on) and wait for 2 s or more. • Perform the DTC inspection for the connectivity master unit (CMU). (Refer to the [DTC INSPECTION] in the workshop manual) • Is the same Pending DTC present?	Yes	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] in the workshop manual) If the CAN communication is normal, perform the diagnosis from Step 1. • If the malfunction recurs, replace the remote tuner (RT), then go to the next step. (Refer to the [REMOTE TUNER (RT) REMOVAL/INSTALLATION] in the workshop manual)
Repair completion verification 1		No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTCs ARE DISPLAYED • Perform the DTC inspection. (Refer to the [DTC INSPECTION] in the workshop manual)) • Is a DTC displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
Repair completion verification 2		No	DTC troubleshooting completed.