CONFIRMATION STEP 2: AUDIO CONTROL SWITCH CONFIRMATION [ENTIRE AUDIO SYSTEM]

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• Verify the customer complaint and identify the malfunction as occurring from either the audio control switch or the audio unit.

STEP

INSPECTION

ACTION

1

•  Is the symptom related to either the audio control switch or audio panel operation?

Yes

Verify the customer complaint and then go to the appropriate symptom troubleshooting procedure.

No

The symptom is related to the audio panel operation:

•  Follow the “Confirmation Step 1”.

The symptom is related to the audio control switch operation:

•  Go to the next step.

2

•  Disconnect the audio unit connector (24-pin).

•  Inspect both the audio unit and the wiring harness-side connectors for a poor connection. (such as damaged/pulled-out pins, corrosion).

―  Terminal N (ST SW1)

―  Terminal P (ST SW2)

•  Are all the pins normal?

Yes

Go to the next step.

No

If the audio unit side connector is malfunctioning:

•  Replace the audio unit.
(See AUDIO UNIT REMOVAL/INSTALLATION.)

(See AUDIO UNIT DISASSEMBLY/ASSEMBLY.)

If the wiring harness-side connector is malfunctioning:

•  Repair or replace the pins and/or the connector.

3

•  Inspect the continuity between audio unit wiring harness-side connector terminals N and P while operating the audio control switch.

•  Does the resistance change?

Yes

Verify the customer complaint and then go to the appropriate symptom troubleshooting procedure.

No

Go to the next step.

4

•  Turn the ignition switch to the LOCK position.

•  Remove the audio control switch.

•  Inspect the continuity between the audio unit wiring harness-side connector (24-pin) terminal and the audio control switch wiring harness-side connector (8-pin) terminal.

―  Terminal N (24-pin) — Terminal G (8-pin)

―  Terminal P (24-pin) — Terminal H (8-pin)

•  Is there continuity?

Yes

Replace the audio control switch.

(See AUDIO CONTROL SWITCH REMOVAL/INSTALLATION.)

No

Repair or replace the related wiring harnesses.

STEP	INSPECTION		ACTION
1	• Is the symptom related to either the audio control switch or audio panel operation?	Yes	Verify the customer complaint and then go to the appropriate symptom troubleshooting procedure.
1		No	The symptom is related to the audio panel operation: • Follow the “Confirmation Step 1”. The symptom is related to the audio control switch operation: • Go to the next step.
2	• Disconnect the audio unit connector (24-pin). • Inspect both the audio unit and the wiring harness-side connectors for a poor connection. (such as damaged/pulled-out pins, corrosion). ― Terminal N (ST SW1) ― Terminal P (ST SW2) • Are all the pins normal?	Yes	Go to the next step.
2		No	If the audio unit side connector is malfunctioning: • Replace the audio unit. (See AUDIO UNIT REMOVAL/INSTALLATION.) (See AUDIO UNIT DISASSEMBLY/ASSEMBLY.) If the wiring harness-side connector is malfunctioning: • Repair or replace the pins and/or the connector.
3	• Inspect the continuity between audio unit wiring harness-side connector terminals N and P while operating the audio control switch. • Does the resistance change?	Yes	Verify the customer complaint and then go to the appropriate symptom troubleshooting procedure.
3		No	Go to the next step.
4	• Turn the ignition switch to the LOCK position. • Remove the audio control switch. • Inspect the continuity between the audio unit wiring harness-side connector (24-pin) terminal and the audio control switch wiring harness-side connector (8-pin) terminal. ― Terminal N (24-pin) — Terminal G (8-pin) ― Terminal P (24-pin) — Terminal H (8-pin) • Is there continuity?	Yes	Replace the audio control switch. (See AUDIO CONTROL SWITCH REMOVAL/INSTALLATION.)
4		No	Repair or replace the related wiring harnesses.