DTC B1A01:11 [CONNECTIVITY MASTER UNIT (TYPE-B)]

id1602a9000900

Outline

System malfunction location

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

Detection condition

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

Fail-safe

Not applicable

Possible cause

•  Front door speaker (LH) connector or terminal malfunction

•  Tweeter (LH) connector or terminal malfunction (With front side speaker (LH))

•  Audio amplifier connector or terminal malfunction

•  Front door speaker (LH) malfunction

•  Tweeter (LH) malfunction (With front side speaker (LH))

•  Short to ground in front door speaker (LH) audio output circuit

•  Short to ground in tweeter (LH) audio output circuit (With front side speaker (LH))

•  Audio amplifier malfunction

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

•  Go to Step 5.

With front side speaker (LH):

•  Go to the next step.

No

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

4

INSPECT TWEETER (LH) 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 (LH) FOR MALFUNCTION

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

•  Is the part normal?

Yes

Without front side speaker (LH):

•  Go to Step 8

With front side speaker (LH):

•  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 (LH) 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 (LH) AUDIO OUTPUT CIRCUIT FOR SHORT TO GROUND

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

•  Is the circuit normal?

Yes

Without front side speaker (LH):

•  Go to Step 10.

With front side speaker (LH):

•  Go to the next step.

No

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

9

INSPECT TWEETER (LH) AUDIO OUTPUT CIRCUIT FOR SHORT TO GROUND

•  Inspect the applicable circuit for a short to ground.
(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 TWEETER (LH) (With FRONT SIDE SPEAKER (LH)) AND FRONT DOOR SPEAKER (LH)

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

•  Do the tweeter (LH) (with front side speaker (LH)) and front door speaker (LH) 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)].)
1		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)].)
2		No	Go to the next step.
3	INSPECT FRONT DOOR SPEAKER (LH) 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 front side speaker (LH): • Go to Step 5. With front side speaker (LH): • Go to the next step.
3		No	Repair or replace the malfunctioning location and perform the repair completion verification.
4	INSPECT TWEETER (LH) 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.
4		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.
5		No	Repair or replace the malfunctioning location and perform the repair completion verification.
6	INSPECT FRONT DOOR SPEAKER (LH) FOR MALFUNCTION • Inspect the applicable part. (Refer to the [SPEAKER INSPECTION] in the workshop manual) • Is the part normal?	Yes	Without front side speaker (LH): • Go to Step 8 With front side speaker (LH): • Go to the next step.
6		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 (LH) 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.
7		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 (LH) AUDIO OUTPUT CIRCUIT FOR SHORT TO GROUND • Inspect the applicable circuit for a short to ground. (Refer to the [CIRCUIT INSPECTION] in the workshop manual) • Is the circuit normal?	Yes	Without front side speaker (LH): • Go to Step 10. With front side speaker (LH): • Go to the next step.
8		No	Repair or replace the malfunctioning location and perform the repair completion verification.
9	INSPECT TWEETER (LH) AUDIO OUTPUT CIRCUIT FOR SHORT TO GROUND • Inspect the applicable circuit for a short to ground. (Refer to the [CIRCUIT INSPECTION] in the workshop manual) • Is the circuit normal?	Yes	Go to the next step.
9		No	Repair or replace the malfunctioning location and perform the repair completion verification.
10	INSPECT AUDIO OUTPUT FROM TWEETER (LH) (With FRONT SIDE SPEAKER (LH)) AND FRONT DOOR SPEAKER (LH) • Perform the [Active Speaker Check Function] using the diagnostic assist function. (See DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT (TYPE-B) (E)].) • Do the tweeter (LH) (with front side speaker (LH)) and front door speaker (LH) 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.
10		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)
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) • Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
Repair completion verification 2		No	DTC troubleshooting completed.