Description

Speaker circuit malfunction

Detection condition

• The connectivity master unit (CMU) detected a short to ground or short to power supply in the speaker circuit with the ignition switched ON (engine off or on).

Fail-safe

Not applicable

Possible cause

• Tuner and amp unit (TAU) connector or terminal malfunction

• Door speaker (LH) connector or terminal malfunction

• Tweeter (LH) connector or terminal malfunction

• Short to ground in wiring harness between the following terminals:

• Tuner and amp unit (TAU) terminal 2A—Door speaker (LH) terminal C

• Tuner and amp unit (TAU) terminal 2C—Door speaker (LH) terminal B

• Tuner and amp unit (TAU) terminal 2A—Tweeter (LH) terminal B

• Tuner and amp unit (TAU) terminal 2C—Tweeter (LH) terminal A

• Short to power supply in wiring harness between the following terminals:

• Tuner and amp unit (TAU) terminal 2A—Door speaker (LH) terminal C

• Tuner and amp unit (TAU) terminal 2C—Door speaker (LH) terminal B

• Tuner and amp unit (TAU) terminal 2A—Tweeter (LH) terminal B

• Tuner and amp unit (TAU) terminal 2C—Tweeter (LH) terminal A

• Door speaker (LH) malfunction

• Tweeter (LH) malfunction

• Door speaker (RH) connector or terminal malfunction

• Tweeter (RH) connector or terminal malfunction

• Short to ground in wiring harness between the following terminals:

• Tuner and amp unit (TAU) terminal 2D—Door speaker (RH) terminal C

• Tuner and amp unit (TAU) terminal 2F—Door speaker (RH) terminal B

• Tuner and amp unit (TAU) terminal 2D—Tweeter (RH) terminal B

• Tuner and amp unit (TAU) terminal 2F—Tweeter (RH) terminal A

• Short to power supply in wiring harness between the following terminals:

• Tuner and amp unit (TAU) terminal 2D—Door speaker (RH) terminal C

• Tuner and amp unit (TAU) terminal 2F—Door speaker (RH) terminal B

• Tuner and amp unit (TAU) terminal 2D—Tweeter (RH) terminal B

• Tuner and amp unit (TAU) terminal 2F—Tweeter (RH) terminal A

• Door speaker (RH) malfunction

• Tweeter (RH) malfunction

• Driver-side headrest speaker (LH) connector or terminal malfunction

• Short to ground in wiring harness between the following terminals:

• Tuner and amp unit (TAU) terminal 2S—Driver-side headrest speaker (LH) terminal B

• Tuner and amp unit (TAU) terminal 2U—Driver-side headrest speaker (LH) terminal A

• Short to power supply in wiring harness between the following terminals:

• Tuner and amp unit (TAU) terminal 2S—Driver-side headrest speaker (LH) terminal B

• Tuner and amp unit (TAU) terminal 2U—Driver-side headrest speaker (LH) terminal A

• Driver-side headrest speaker (LH) malfunction

• Driver-side headrest speaker (RH) connector or terminal malfunction

• Short to ground in wiring harness between the following terminals:

• Tuner and amp unit (TAU) terminal 2V—Driver-side headrest speaker (RH) terminal B

• Tuner and amp unit (TAU) terminal 2X—Driver-side headrest speaker (RH) terminal A

• Short to power supply in wiring harness between the following terminals:

• Tuner and amp unit (TAU) terminal 2V—Driver-side headrest speaker (RH) terminal B

• Tuner and amp unit (TAU) terminal 2X—Driver-side headrest speaker (RH) terminal A

• Driver-side headrest speaker (RH) malfunction

• Tuner and amp unit (TAU) malfunction

Step

Inspection

Action

1

• Perform diagnostic assist code “94” speaker inspection.

  (See DIAGNOSTIC ASSIST FUNCTION [CONNECTIVITY MASTER UNIT].)

• Is audio produced from each speaker in order?

Yes

Go to Step 27.

No

No audio produced from door speaker (LH) and tweeter (LH)

• Go to the next step.

No audio produced from door speaker (RH) and tweeter (RH)

• Go to Step 9.

No sound produced from driver-side headrest speaker (LH)

• Go to Step 16.

No audio produced from driver-side headrest speaker (RH)

• Go to Step 21.

No audio produced from all speakers.

• Go to Step 26.

2

• Switch the ignition off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Disconnect the tuner and amp unit (TAU) connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 27.

3

• Disconnect the door speaker (LH) connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 27.

4

• Disconnect the tweeter (LH) connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 27.

5

• Verify that the following connectors are disconnected:

• Tuner and amp unit (TAU)

• Door speaker (LH)

• Tweeter (LH)

• Inspect for continuity between the following terminals (wiring harness-side) and body ground:

• Door speaker (LH) terminal C

• Door speaker (LH) terminal B

• Is there continuity?

Yes

Refer to the wiring diagram and verify if there is a common connector between the following terminals:

• Tuner and amp unit (TAU) terminal 2A—Door speaker (LH) terminal C

• Tuner and amp unit (TAU) terminal 2C—Door speaker (LH) terminal B

• Tuner and amp unit (TAU) terminal 2A—Tweeter (LH) terminal B

• Tuner and amp unit (TAU) terminal 2C—Tweeter (LH) terminal A

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

Go to Step 27.

No

Go to the next step.

6

• Verify that the following connectors are disconnected:

• Tuner and amp unit (TAU)

• Door speaker (LH)

• Tweeter (LH)

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Switch the ignition ON (engine off or on).

• Measure the voltage at the following terminals (wiring harness-side):

• Door speaker (LH) terminal C

• Door speaker (LH) terminal B

• Is the voltage 0 V?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify if there is a common connector between the following terminals:

• Tuner and amp unit (TAU) terminal 2A—Door speaker (LH) terminal C

• Tuner and amp unit (TAU) terminal 2C—Door speaker (LH) terminal B

• Tuner and amp unit (TAU) terminal 2A—Tweeter (LH) terminal B

• Tuner and amp unit (TAU) terminal 2C—Tweeter (LH) terminal A

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to power supply.

Go to Step 27.

7

• Inspect the door speaker (LH).

  (See DOOR SPEAKER INSPECTION.)

• Is the door speaker (LH) normal?

Yes

Go to the next step.

No

Replace the door speaker (LH), then go to Step 27.

(See DOOR SPEAKER REMOVAL/INSTALLATION.)

8

• Inspect the tweeter (LH)

  (See TWEETER INSPECTION.)

• Is the tweeter (LH) normal?

Yes

Go to Step 27.

No

Replace the tweeter (LH), then go to Step 27.

(See TWEETER REMOVAL/INSTALLATION.)

9

• Switch the ignition off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Disconnect the tuner and amp unit (TAU) connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 27.

10

• Disconnect the door speaker (RH) connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 27.

11

• Disconnect the tweeter (RH) connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 27.

12

• Verify that the following connectors are disconnected:

• Tuner and amp unit (TAU)

• Door speaker (RH)

• Tweeter (RH)

• Inspect for continuity between the following terminals (wiring harness-side) and body ground:

• Door speaker (RH) terminal C

• Door speaker (RH) terminal B

• Is there continuity?

Yes

Refer to the wiring diagram and verify if there is a common connector between the following terminals:

• Tuner and amp unit (TAU) terminal 2D—Door speaker (RH) terminal C

• Tuner and amp unit (TAU) terminal 2F—Door speaker (RH) terminal B

• Tuner and amp unit (TAU) terminal 2D—Tweeter (RH) terminal B

• Tuner and amp unit (TAU) terminal 2F—Tweeter (RH) terminal A

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

Go to Step 27.

No

Go to the next step.

13

• Verify that the following connectors are disconnected:

• Tuner and amp unit (TAU)

• Door speaker (RH)

• Tweeter (RH)

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Switch the ignition ON (engine off or on).

• Measure the voltage at the following terminals (wiring harness-side):

• Door speaker (RH) terminal C

• Door speaker (RH) terminal B

• Is the voltage 0 V?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify if there is a common connector between the following terminals:

• Tuner and amp unit (TAU) terminal 2D—Door speaker (RH) terminal C

• Tuner and amp unit (TAU) terminal 2F—Door speaker (RH) terminal B

• Tuner and amp unit (TAU) terminal 2D—Tweeter (RH) terminal B

• Tuner and amp unit (TAU) terminal 2F—Tweeter (RH) terminal A

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to power supply.

Go to Step 27.

14

• Inspect the door speaker (RH).

  (See DOOR SPEAKER INSPECTION.)

• Is the door speaker (RH) normal?

Yes

Go to the next step.

No

Replace the door speaker (RH), then go to Step 27.

(See DOOR SPEAKER REMOVAL/INSTALLATION.)

15

• Inspect the tweeter (RH).

  (See TWEETER INSPECTION.)

• Is the tweeter (RH) normal?

Yes

Go to Step 27.

No

Replace the tweeter (RH), then go to Step 27.

(See TWEETER REMOVAL/INSTALLATION.)

16

• Switch the ignition off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Disconnect the tuner and amp unit (TAU) connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 27.

17

• Disconnect the driver-side headrest speaker (LH) connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 27.

18

• Verify that the tuner and amp unit (TAU) and driver-side headrest speaker (LH) connectors are disconnected.

• Inspect for continuity between the following terminals (wiring harness-side) and body ground:

• Driver-side headrest speaker (LH) terminal B

• Driver-side headrest speaker (LH) terminal A

• Is there continuity?

Yes

Refer to the wiring diagram and verify if there is a common connector between the following terminals:

• Tuner and amp unit (TAU) terminal 2S—Driver-side headrest speaker (LH) terminal B

• Tuner and amp unit (TAU) terminal 2U—Driver-side headrest speaker (LH) terminal A

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

Go to Step 27.

No

Go to the next step.

19

• Verify that the tuner and amp unit (TAU) and driver-side headrest speaker (LH) connectors are disconnected.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Switch the ignition ON (engine off or on).

• Measure the voltage at the following terminals (wiring harness-side):

• Driver-side headrest speaker (LH) terminal B

• Driver-side headrest speaker (LH) terminal A

• Is the voltage 0 V?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify if there is a common connector between the following terminals:

• Tuner and amp unit (TAU) terminal 2S—Driver-side headrest speaker (LH) terminal B

• Tuner and amp unit (TAU) terminal 2U—Driver-side headrest speaker (LH) terminal A

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to power supply.

Go to Step 27.

20

• Inspect the driver-side headrest speaker (LH).

  (See HEADREST SPEAKER INSPECTION.)

• Is the driver-side headrest speaker (LH) normal?

Yes

Go to Step 27.

No

Replace the driver-side headrest speaker (LH), then go to Step 27.

(See HEADREST SPEAKER REMOVAL/INSTALLATION.)

21

• Switch the ignition off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Disconnect the tuner and amp unit (TAU) connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 27.

22

• Disconnect the driver-side headrest speaker (RH) connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 27.

23

• Verify that the tuner and amp unit (TAU) and driver-side headrest speaker (RH) connectors are disconnected.

• Inspect for continuity between the following terminals (wiring harness-side) and body ground:

• Driver-side headrest speaker (RH) terminal B

• Driver-side headrest speaker (RH) terminal A

• Is there continuity?

Yes

Refer to the wiring diagram and verify if there is a common connector between the following terminals:

• Tuner and amp unit (TAU) terminal 2V—Driver-side headrest speaker (RH) terminal B

• Tuner and amp unit (TAU) terminal 2X—Driver-side headrest speaker (RH) terminal A

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

Go to Step 27.

No

Go to the next step.

24

• Verify that the tuner and amp unit (TAU) and driver-side headrest speaker (RH) connectors are disconnected.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Switch the ignition ON (engine off or on).

• Measure the voltage at the following terminals (wiring harness-side):

• Driver-side headrest speaker (RH) terminal B

• Driver-side headrest speaker (RH) terminal A

• Is the voltage 0 V?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify if there is a common connector between the following terminals:

• Tuner and amp unit (TAU) terminal 2V—Driver-side headrest speaker (RH) terminal B

• Tuner and amp unit (TAU) terminal 2X—Driver-side headrest speaker (RH) terminal A

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to power supply.

Go to Step 27.

25

• Inspect the driver-side headrest speaker (RH).

  (See HEADREST SPEAKER INSPECTION.)

• Is the driver-side headrest speaker (RH) normal?

Yes

Go to Step 27.

No

Replace the driver-side headrest speaker (RH), then go to Step 27.

(See HEADREST SPEAKER REMOVAL/INSTALLATION.)

26

• Switch the ignition off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Disconnect the tuner and amp unit (TAU) connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to the next step.

27

• Always reconnect all disconnected connectors.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Clear the DTC for the connectivity master unit (CMU) using the M-MDS.

  (See CLEARING DTC [CONNECTIVITY MASTER UNIT].)

• Switch the ignition ON (engine off or on) and wait for 7 s or more.

• Retrieve the connectivity master unit (CMU) DTCs using the M-MDS.

  (See DTC INSPECTION [CONNECTIVITY MASTER UNIT].)

• Is the same DTC displayed?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the tuner and amp unit (TAU).

  (See TUNER AND AMP UNIT (TAU) REMOVAL/INSTALLATION.)

Go to the next step.

No

Go to the next step.

28

• Are any other DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [CONNECTIVITY MASTER UNIT].)

No

DTC troubleshooting completed.

Description

Audio amplifier circuit malfunction

Detection condition

• The connectivity master unit (CMU) detected a short to ground or short to power supply in the audio amplifier circuit with the ignition switched ON (engine off or on).

Fail-safe

Not applicable

Possible cause

• Audio amplifier connector or terminal malfunction

• Tuner and amp unit (TAU) connector or terminal malfunction

• Short to ground in wiring harness between the following terminals:

• Tuner and amp unit (TAU) terminal 2A—Audio amplifier terminal 1O

• Tuner and amp unit (TAU) terminal 2C—Audio amplifier terminal 1P

• Tuner and amp unit (TAU) terminal 2D—Audio amplifier terminal 1M

• Tuner and amp unit (TAU) terminal 2F—Audio amplifier terminal 1N

• Tuner and amp unit (TAU) terminal 2J—Audio amplifier terminal 2D

• Tuner and amp unit (TAU) terminal 2S—Audio amplifier terminal 1K

• Tuner and amp unit (TAU) terminal 2T—Audio amplifier terminal 2H

• Tuner and amp unit (TAU) terminal 2U—Audio amplifier terminal 1L

• Tuner and amp unit (TAU) terminal 2V—Audio amplifier terminal 1I

• Tuner and amp unit (TAU) terminal 2X—Audio amplifier terminal 1J

• Short to power supply in wiring harness between the following terminals:

• Tuner and amp unit (TAU) terminal 2A—Audio amplifier terminal 1O

• Tuner and amp unit (TAU) terminal 2C—Audio amplifier terminal 1P

• Tuner and amp unit (TAU) terminal 2D—Audio amplifier terminal 1M

• Tuner and amp unit (TAU) terminal 2F—Audio amplifier terminal 1N

• Tuner and amp unit (TAU) terminal 2J—Audio amplifier terminal 2D

• Tuner and amp unit (TAU) terminal 2S—Audio amplifier terminal 1K

• Tuner and amp unit (TAU) terminal 2T—Audio amplifier terminal 2H

• Tuner and amp unit (TAU) terminal 2U—Audio amplifier terminal 1L

• Tuner and amp unit (TAU) terminal 2V—Audio amplifier terminal 1I

• Tuner and amp unit (TAU) terminal 2X—Audio amplifier terminal 1J

• Audio amplifier malfunction

• Tuner and amp unit (TAU) malfunction

Step

Inspection

Action

1

• Switch the ignition off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Disconnect the audio amplifier connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 6.

2

• Disconnect the tuner and amp unit (TAU) connector.

• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

• Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 6.

3

• Verify that the audio amplifier and tuner and amp unit (TAU) connectors are disconnected.

• Inspect for continuity between the following terminals (wiring harness-side) and body ground:

• Audio amplifier terminal 1O

• Audio amplifier terminal 1P

• Audio amplifier terminal 1M

• Audio amplifier terminal 1N

• Audio amplifier terminal 2D

• Audio amplifier terminal 1K

• Audio amplifier terminal 2H

• Audio amplifier terminal 1L

• Audio amplifier terminal 1I

• Audio amplifier terminal 1J

• Is there continuity?

Yes

Refer to the wiring diagram and verify if there is a common connector between the following terminals:

• Tuner and amp unit (TAU) terminal 2A—Audio amplifier terminal 1O

• Tuner and amp unit (TAU) terminal 2C—Audio amplifier terminal 1P

• Tuner and amp unit (TAU) terminal 2D—Audio amplifier terminal 1M

• Tuner and amp unit (TAU) terminal 2F—Audio amplifier terminal 1N

• Tuner and amp unit (TAU) terminal 2J—Audio amplifier terminal 2D

• Tuner and amp unit (TAU) terminal 2S—Audio amplifier terminal 1K

• Tuner and amp unit (TAU) terminal 2T—Audio amplifier terminal 2H

• Tuner and amp unit (TAU) terminal 2U—Audio amplifier terminal 1L

• Tuner and amp unit (TAU) terminal 2V—Audio amplifier terminal 1I

• Tuner and amp unit (TAU) terminal 2X—Audio amplifier terminal 1J

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

Go to Step 6.

No

Go to the next step.

4

• Verify that the audio amplifier and tuner and amp unit (TAU) connectors are disconnected.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Switch the ignition ON (engine off or on).

• Measure the voltage at the following terminals (wiring harness-side):

• Audio amplifier terminal 1O

• Audio amplifier terminal 1P

• Audio amplifier terminal 1M

• Audio amplifier terminal 1N

• Audio amplifier terminal 2D

• Audio amplifier terminal 1K

• Audio amplifier terminal 2H

• Audio amplifier terminal 1L

• Audio amplifier terminal 1I

• Audio amplifier terminal 1J

• Is the voltage 0 V?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify if there is a common connector between the following terminals:

• Tuner and amp unit (TAU) terminal 2A—Audio amplifier terminal 1O

• Tuner and amp unit (TAU) terminal 2C—Audio amplifier terminal 1P

• Tuner and amp unit (TAU) terminal 2D—Audio amplifier terminal 1M

• Tuner and amp unit (TAU) terminal 2F—Audio amplifier terminal 1N

• Tuner and amp unit (TAU) terminal 2J—Audio amplifier terminal 2D

• Tuner and amp unit (TAU) terminal 2S—Audio amplifier terminal 1K

• Tuner and amp unit (TAU) terminal 2T—Audio amplifier terminal 2H

• Tuner and amp unit (TAU) terminal 2U—Audio amplifier terminal 1L

• Tuner and amp unit (TAU) terminal 2V—Audio amplifier terminal 1I

• Tuner and amp unit (TAU) terminal 2X—Audio amplifier terminal 1J

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to power supply.

Go to Step 6.

5

• Always reconnect all disconnected connectors.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Clear the DTC for the connectivity master unit (CMU) using the M-MDS.

  (See CLEARING DTC [CONNECTIVITY MASTER UNIT].)

• Switch the ignition ON (engine off or on) and wait for 7 s or more.

• Retrieve the connectivity master unit (CMU) DTCs using the M-MDS.

  (See DTC INSPECTION [CONNECTIVITY MASTER UNIT].)

• Is the same DTC displayed?

Yes

Replace the audio amplifier, then go to the next step.

(See AUDIO AMPLIFIER REMOVAL/INSTALLATION.)

No

Go to Step 7.

6

• Always reconnect all disconnected connectors.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Clear the DTC for the connectivity master unit (CMU) using the M-MDS.

  (See CLEARING DTC [CONNECTIVITY MASTER UNIT].)

• Switch the ignition ON (engine off or on) and wait for 7 s or more.

• Retrieve the connectivity master unit (CMU) DTCs using the M-MDS.

  (See DTC INSPECTION [CONNECTIVITY MASTER UNIT].)

• Is the same DTC displayed?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the tuner and amp unit (TAU).

  (See TUNER AND AMP UNIT (TAU) REMOVAL/INSTALLATION.)

Go to the next step.

No

Go to the next step.

7

• Are any other DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [CONNECTIVITY MASTER UNIT].)

No

DTC troubleshooting completed.