DTC B1A05:12 [CONNECTIVITY MASTER UNIT (TYPE-B)]

id1602a9002600

Without Bose^®

Outline

System malfunction location

Front door speaker (RH) audio output circuit or tweeter (RH) audio output circuit malfunction

Detection condition

•  The audio amplifier detects a short to power supply in the front door speaker (RH) audio output circuit or tweeter (RH) audio output circuit for 30 s.

Fail-safe

Not applicable

Possible cause

•  Front door speaker (RH) connector or terminal malfunction

•  Tweeter (RH) connector or terminal malfunction (With tweeter (RH))

•  Audio amplifier connector or terminal malfunction

•  Front door speaker (RH) malfunction

•  Tweeter (RH) malfunction (With tweeter (RH))

•  Short to power supply in front door speaker (RH) audio output circuit

•  Short to power supply in tweeter (RH) audio output circuit (With tweeter (RH))

•  Audio amplifier malfunction

System malfunction location	Front door speaker (RH) audio output circuit or tweeter (RH) audio output circuit malfunction
Detection condition	• The audio amplifier detects a short to power supply in the front door speaker (RH) audio output circuit or tweeter (RH) audio output circuit for 30 s.
Fail-safe	Not applicable
Possible cause	• Front door speaker (RH) connector or terminal malfunction • Tweeter (RH) connector or terminal malfunction (With tweeter (RH)) • Audio amplifier connector or terminal malfunction • Front door speaker (RH) malfunction • Tweeter (RH) malfunction (With tweeter (RH)) • Short to power supply in front door speaker (RH) audio output circuit • Short to power supply in tweeter (RH) audio output circuit (With tweeter (RH)) • Audio amplifier malfunction

Diagnostic Procedure

Step

Inspection

Results

Action

1

INSPECT CONNECTIVITY MASTER UNIT (CMU) FOR MALFUNCTION

•  Switch the ignition OFF, and then switch it ON (engine off).

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

•  Is a DTC related to an internal malfunction displayed?

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 AUDIO AMPLIFIER FOR MALFUNCTION

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

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

•  Is DTC B1238:49 displayed?

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.

3

INSPECT FRONT DOOR SPEAKER (RH) 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

Without tweeter (RH):

•  Go to Step 5.

With tweeter (RH):

•  Go to the next step.

No

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

4

INSPECT TWEETER (RH) 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.

5

INSPECT AUDIO 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.

6

INSPECT FRONT DOOR SPEAKER (RH) FOR MALFUNCTION

•  Inspect the applicable part.
(Refer to the [SPEAKER INSPECTION] in the workshop manual)

•  Is the part normal?

Yes

Without tweeter (RH):

•  Go to Step 8.

With tweeter (RH):

•  Go to the next step.

No

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

(Refer to the [FRONT DOOR SPEAKER REMOVAL/INSTALLATION] in the workshop manual)

7

INSPECT TWEETER (RH) FOR MALFUNCTION

•  Inspect the applicable part.
(Refer to the [SPEAKER INSPECTION] in the workshop manual)

•  Is the part normal?

Yes

Go to the next step.

No

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

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

8

INSPECT FRONT DOOR SPEAKER (RH) AUDIO OUTPUT CIRCUIT FOR SHORT TO POWER SUPPLY

•  Inspect the applicable circuit for a short to power supply.
(Refer to the [CIRCUIT INSPECTION] in the workshop manual)

•  Is the circuit normal?

Yes

Without tweeter (RH):

•  Go to Step 10.

With tweeter (RH):

•  Go to the next step.

No

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

9

INSPECT TWEETER (RH) AUDIO OUTPUT CIRCUIT FOR SHORT TO POWER SUPPLY

•  Inspect the applicable circuit for a short to power supply.
(Refer to the [CIRCUIT INSPECTION] in the workshop manual)

•  Is the circuit normal?

Yes

Go to the next step.

No

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

10

INSPECT AUDIO OUTPUT FROM FRONT DOOR SPEAKER (RH) AND TWEETER (RH) (WITH TWEETER (RH))

•  Perform the [Active Speaker Check Function] using the diagnostic assist function.
(See DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT (TYPE-B) (E)].)

•  Do the front door speaker (RH) and tweeter (RH) (with tweeter (RH)) output audio at the time of their turn?

Yes

Perform the [ACTION FOR NON-REPEATABLE MALFUNCTIONS].

(Refer to the [TROUBLESHOOTING PROCEDURE] in the workshop manual)

If DTC is displayed

•  Repeat the diagnosis from Step 1.

If DTC is not displayed

•  Go to repair completion verification 2.

No

Go to the next step.

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 30 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 audio amplifier, then go to the next step.
(Refer to the [AUDIO AMPLIFIER 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)

•  Are any other DTCs 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) FOR MALFUNCTION • Switch the ignition OFF, and then switch it ON (engine off). • Perform the DTC inspection for the connectivity master unit (CMU). (Refer to the [DTC INSPECTION] in the workshop manual) • Is a DTC related to an internal malfunction displayed?	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 AUDIO AMPLIFIER FOR MALFUNCTION • Clear the DTC recorded in the memory. (Refer to the [CLEARING DTC] in the workshop manual) • Perform the DTC inspection for the connectivity master unit (CMU). (Refer to the [DTC INSPECTION] in the workshop manual) • Is DTC B1238:49 displayed?	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.
3	INSPECT FRONT DOOR SPEAKER (RH) 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	Without tweeter (RH): • Go to Step 5. With tweeter (RH): • Go to the next step.
No	Repair or replace the malfunctioning location and perform the repair completion verification.
4	INSPECT TWEETER (RH) 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.
5	INSPECT AUDIO 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.
6	INSPECT FRONT DOOR SPEAKER (RH) FOR MALFUNCTION • Inspect the applicable part. (Refer to the [SPEAKER INSPECTION] in the workshop manual) • Is the part normal?	Yes	Without tweeter (RH): • Go to Step 8. With tweeter (RH): • Go to the next step.
No	Repair or replace the malfunctioning location and perform the repair completion verification. (Refer to the [FRONT DOOR SPEAKER REMOVAL/INSTALLATION] in the workshop manual)
7	INSPECT TWEETER (RH) FOR MALFUNCTION • Inspect the applicable part. (Refer to the [SPEAKER INSPECTION] in the workshop manual) • Is the part normal?	Yes	Go to the next step.
No	Repair or replace the malfunctioning location and perform the repair completion verification. (Refer to the [TWEETER REMOVAL/INSTALLATION] in the workshop manual)
8	INSPECT FRONT DOOR SPEAKER (RH) AUDIO OUTPUT CIRCUIT FOR SHORT TO POWER SUPPLY • Inspect the applicable circuit for a short to power supply. (Refer to the [CIRCUIT INSPECTION] in the workshop manual) • Is the circuit normal?	Yes	Without tweeter (RH): • Go to Step 10. With tweeter (RH): • Go to the next step.
No	Repair or replace the malfunctioning location and perform the repair completion verification.
9	INSPECT TWEETER (RH) AUDIO OUTPUT CIRCUIT FOR SHORT TO POWER SUPPLY • Inspect the applicable circuit for a short to power supply. (Refer to the [CIRCUIT INSPECTION] in the workshop manual) • Is the circuit normal?	Yes	Go to the next step.
No	Repair or replace the malfunctioning location and perform the repair completion verification.
10	INSPECT AUDIO OUTPUT FROM FRONT DOOR SPEAKER (RH) AND TWEETER (RH) (WITH TWEETER (RH)) • Perform the [Active Speaker Check Function] using the diagnostic assist function. (See DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT (TYPE-B) (E)].) • Do the front door speaker (RH) and tweeter (RH) (with tweeter (RH)) output audio at the time of their turn?	Yes	Perform the [ACTION FOR NON-REPEATABLE MALFUNCTIONS]. (Refer to the [TROUBLESHOOTING PROCEDURE] in the workshop manual) If DTC is displayed • Repeat the diagnosis from Step 1. If DTC is not displayed • Go to repair completion verification 2.
No	Go to the next step.
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 30 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 audio amplifier, then go to the next step. (Refer to the [AUDIO AMPLIFIER 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) • Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
No	DTC troubleshooting completed.

With Bose^®

Outline

System malfunction location

Bass-box audio output circuit malfunction

Detection condition

•  The audio amplifier detects a short to power supply in the bass-box audio output circuit for 30 s.

Fail-safe

Not applicable

Possible cause

•  Bass-box connector or terminal malfunction

•  Audio amplifier connector or terminal malfunction

•  Bass-box malfunction

•  Short to power supply in bass-box audio output circuit

•  Audio amplifier malfunction

System malfunction location	Bass-box audio output circuit malfunction
Detection condition	• The audio amplifier detects a short to power supply in the bass-box audio output circuit for 30 s.
Fail-safe	Not applicable
Possible cause	• Bass-box connector or terminal malfunction • Audio amplifier connector or terminal malfunction • Bass-box malfunction • Short to power supply in bass-box audio output circuit • Audio amplifier malfunction

Diagnostic Procedure

Step

Inspection

Results

Action

1

INSPECT CONNECTIVITY MASTER UNIT (CMU) FOR MALFUNCTION

•  Switch the ignition OFF, and then switch it ON (engine off).

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

•  Is a DTC related to an internal malfunction displayed?

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 AUDIO AMPLIFIER FOR MALFUNCTION

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

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

•  Is DTC B1238:49 displayed?

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.

3

INSPECT BASS-BOX 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 AUDIO 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.

5

INSPECT BASS-BOX FOR MALFUNCTION

•  Inspect the applicable part.
(Refer to the [SPEAKER INSPECTION] in the workshop manual)

•  Is the part normal?

Yes

Go to the next step.

No

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

(Refer to the [BASS-BOX REMOVAL/INSTALLATION] in the workshop manual)

6

INSPECT BASS-BOX AUDIO OUTPUT CIRCUIT FOR SHORT TO POWER SUPPLY

•  Inspect the applicable circuit for a short to power supply.
(Refer to the [CIRCUIT INSPECTION] in the workshop manual)

•  Is the circuit normal?

Yes

Go to the next step.

No

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

7

INSPECT AUDIO OUTPUT FROM BASS-BOX

•  Perform the [Active Speaker Check Function] using the diagnostic assist function.
(See DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT (TYPE-B) (E)].)

•  Does the bass-box output audio at the time of its turn?

Yes

Perform the [ACTION FOR NON-REPEATABLE MALFUNCTIONS].

(Refer to the [TROUBLESHOOTING PROCEDURE] in the workshop manual)

If DTC is displayed

•  Repeat the diagnosis from Step 1.

If DTC is not displayed

•  Go to repair completion verification 2.

No

Go to the next step.

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 30 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 audio amplifier, then go to the next step.
(Refer to the [AUDIO AMPLIFIER 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)

•  Are any other DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

No

DTC troubleshooting completed.