CONFIRMATION STEP 2: AUDIO CONTROL SWITCH CONFIRMATION [AUDIO]

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• Make sure the customer complain and identify either the audio control switch malfunction or audio unit/car-navigation unit malfunction.

STEP

INSPECTION

ACTION

1

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

Yes

Make sure the customer complain 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/car-navigation unit connector (24-pin).

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

―  Terminal 1N (audio control switch1)

―  Terminal 1P (audio control switch2)

•  Are all the pins normal?

Yes

Go to the next step.

No

If the audio unit/car-navigation unit side connector is wrong:

•  Replace the audio unit/car-navigation unit.
(See CENTER PANEL UNIT REMOVAL/INSTALLATION.)

(See CENTER PANEL UNIT DISASSEMBLY/ASSEMBLY.)

If the wiring harness-side connector is wrong:

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

3

•  Inspect the continuity between the audio unit/car-navigation unit wiring harness-side connector terminal 1N and 1P while operating the audio control switch.

•  Does the resistance change?

Yes

Make sure the customer complain 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/car-navigation unit wiring harness-side connector (24-pin) terminal and the audio control switch wiring harness-side connector (8-pin) terminal.

―  Terminal 1N (24-pin) — Terminal B (8-pin)

―  Terminal 1P (24-pin) — Terminal A (8-pin)

•  Is there continuity?

Yes

Replace the audio control switch.

(See AUDIO CONTROL SWITCH REMOVAL/INSTALLATION.)

No

Repair or replace the wiring harness.

STEP	INSPECTION		ACTION
1	• Is the symptom related to either the audio control switch or the audio panel operation?	Yes	Make sure the customer complain 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/car-navigation unit connector (24-pin). • Inspect both the audio unit/car-navigation unit and wiring harness-side connectors for poor connection. (such as damaged/pulled-out pins, corrosion). ― Terminal 1N (audio control switch1) ― Terminal 1P (audio control switch2) • Are all the pins normal?	Yes	Go to the next step.
2		No	If the audio unit/car-navigation unit side connector is wrong: • Replace the audio unit/car-navigation unit. (See CENTER PANEL UNIT REMOVAL/INSTALLATION.) (See CENTER PANEL UNIT DISASSEMBLY/ASSEMBLY.) If the wiring harness-side connector is wrong: • Repair or replace the pins and/or the connector.
3	• Inspect the continuity between the audio unit/car-navigation unit wiring harness-side connector terminal 1N and 1P while operating the audio control switch. • Does the resistance change?	Yes	Make sure the customer complain 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/car-navigation unit wiring harness-side connector (24-pin) terminal and the audio control switch wiring harness-side connector (8-pin) terminal. ― Terminal 1N (24-pin) — Terminal B (8-pin) ― Terminal 1P (24-pin) — Terminal A (8-pin) • Is there continuity?	Yes	Replace the audio control switch. (See AUDIO CONTROL SWITCH REMOVAL/INSTALLATION.)
4		No	Repair or replace the wiring harness.