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

STEP	INSPECTION	ACTION
1	Is the symptom related to either the steering 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 steering switch operation: • Go to the next step.
2	• Disconnect the audio unit/car-navigation unit (without integrated multi information display) connector (24-pin). • Inspect both the audio unit/car-navigation unit (without integrated multi information display) and wiring harness-side connectors for poor connection (such as damaged/pulled-out pins, corrosion). ― Terminal 1N (ST SW1) ― Terminal 1P (ST SW2) • Are all the pins normal?	Yes	Go to the next step.
No	If the audio unit/car-navigation unit (without integrated multi information display) side connector is wrong: • Replace the audio unit/car-navigation unit (without integrated multi information display). (See AUDIO UNIT REMOVAL/INSTALLATION.) (See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.) 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 (without integrated multi information display) wiring harness-side connector terminal 1N and 1P while operating the steering 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 steering switch. (See STEERING SWITCH REMOVAL/INSTALLATION.) • Inspect the continuity between the audio unit/car-navigation unit (without integrated multi information display) wiring harness-side connector (24-pin) terminal and the steering switch wiring harness-side connector (16-pin) terminal. ― Terminal 1N (24-pin) — Terminal G (16-pin) ― Terminal 1P (24-pin) — Terminal I (16-pin) • Is there the continuity?	Yes	Replace the steering switch. (See STEERING SWITCH REMOVAL/INSTALLATION.)
No	Repair or replace the suspect wiring harness.

STEP

INSPECTION

ACTION

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

Yes

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

The symptom is related to the audio panel operation:

• Follow the “Confirmation Step 1”.

The symptom is related to the steering switch operation:

• Go to the next step.

• Disconnect the audio unit/car-navigation unit (without integrated multi information display) connector (24-pin).

• Inspect both the audio unit/car-navigation unit (without integrated multi information display) and wiring harness-side connectors for poor connection (such as damaged/pulled-out pins, corrosion).

― Terminal 1N (ST SW1)

― Terminal 1P (ST SW2)

• Are all the pins normal?

Yes

Go to the next step.

If the audio unit/car-navigation unit (without integrated multi information display) side connector is wrong:

• Replace the audio unit/car-navigation unit (without integrated multi information display). (See AUDIO UNIT REMOVAL/INSTALLATION.) (See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)

If the wiring harness-side connector is wrong:

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

• Inspect the continuity between the audio unit/car-navigation unit (without integrated multi information display) wiring harness-side connector terminal 1N and 1P while operating the steering switch.

• Does the resistance change?

Yes

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

Go to the next step.

• Turn the ignition switch to the LOCK position.

• Remove the steering switch. (See STEERING SWITCH REMOVAL/INSTALLATION.)

• Inspect the continuity between the audio unit/car-navigation unit (without integrated multi information display) wiring harness-side connector (24-pin) terminal and the steering switch wiring harness-side connector (16-pin) terminal.

― Terminal 1N (24-pin) — Terminal G (16-pin)

― Terminal 1P (24-pin) — Terminal I (16-pin)

• Is there the continuity?

Yes

Replace the steering switch.

(See STEERING SWITCH REMOVAL/INSTALLATION.)

Repair or replace the suspect wiring harness.