DTC B1A09:2B [CONNECTIVITY MASTER UNIT]

id1602a1004400

Outline

System malfunction location

Front door speaker (LH) audio output circuit malfunction

Detection condition

•  The audio amplifier detects a short circuit between the front door speaker (LH) audio output circuits for 30 s.

Fail-safe

Not applicable

Possible cause

•  Front door speaker (LH) connector or terminal malfunction

•  Audio amplifier connector or terminal malfunction

•  Front door speaker (LH) malfunction

•  Short circuit between front door speaker (LH) audio output circuits

•  Audio amplifier malfunction

System malfunction location	Front door speaker (LH) audio output circuit malfunction
Detection condition	• The audio amplifier detects a short circuit between the front door speaker (LH) audio output circuits for 30 s.
Fail-safe	Not applicable
Possible cause	• Front door speaker (LH) connector or terminal malfunction • Audio amplifier connector or terminal malfunction • Front door speaker (LH) malfunction • Short circuit between front door speaker (LH) audio output circuits • Audio amplifier malfunction

Diagnostic Procedure

Step

Inspection

Results

Action

1

INSPECT CONNECTIVITY MASTER UNIT (CMU) AND BODY CONTROL MODULE (BCM) FOR MALFUNCTION

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

•  Perform the DTC inspection for the connectivity master unit (CMU) and body control module (BCM).
(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 (E)].)

(Refer to the [DTC TABLE [BODY CONTROL MODULE (BCM)]] in the workshop manual)

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 (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

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

6

INSPECT FRONT DOOR SPEAKER (LH) AUDIO OUTPUT CIRCUITS FOR SHORT CIRCUIT

•  Inspect the applicable circuits for a short circuit.
(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 FRONT DOOR SPEAKER (LH)

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

•  Does the front door speaker (LH) 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)

•  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) AND BODY CONTROL MODULE (BCM) FOR MALFUNCTION • Switch the ignition OFF, and then switch it ON (engine off). • Perform the DTC inspection for the connectivity master unit (CMU) and body control module (BCM). (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 (E)].) (Refer to the [DTC TABLE [BODY CONTROL MODULE (BCM)]] in the workshop manual)
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 (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	Go to the next step.
3		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.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification.
5	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	Go to the next step.
5		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)
6	INSPECT FRONT DOOR SPEAKER (LH) AUDIO OUTPUT CIRCUITS FOR SHORT CIRCUIT • Inspect the applicable circuits for a short circuit. (Refer to the [CIRCUIT INSPECTION] in the workshop manual) • Is the circuit normal?	Yes	Go to the next step.
6		No	Repair or replace the malfunctioning location and perform the repair completion verification.
7	INSPECT AUDIO OUTPUT FROM FRONT DOOR SPEAKER (LH) • Perform the [Active Speaker Check Function] using the diagnostic assist function. (See DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT (E)].) • Does the front door speaker (LH) 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.
7		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) • 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.