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

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• Verify the customer complaint and identify either the steering switch malfunction or audio unit malfunction.

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”. (See CONFIRMATION STEP 1: AUDIO PANEL SWITCH CONFIRMATION [ENTIRE AUDIO SYSTEM].) The symptom is related to the steering switch operation: • Go to the next step.
2 | • Disconnect the audio unit connector (24-pin). • Inspect both the audio unit and wiring harness-side connectors for poor connection (such as damaged/pulled-out pins, corrosion). Without Bluetooth system ― Terminal 1N (ST SW1) ― Terminal 1P (ST SW2) With Bluetooth system ― Terminal 1N (ST SW1) ― Terminal 1P (ST SW2) ― Terminal 1H (ST SW3) • Are all the pins normal? | Yes | Go to the next step.
No | If the audio unit side connector is wrong: • Replace the audio unit. (See AUDIO 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 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 OFF position. • Remove the steering switch. (See STEERING SWITCH REMOVAL/INSTALLATION.) • Inspect the continuity between the audio unit wiring harness-side connector (24-pin) terminal and the steering switch wiring harness-side connector (8-pin(without Bluetooth system)/10-pin (with Bluetooth system)) terminal. Without Bluetooth system ― Terminal 1N (24-pin) — Terminal C (8-pin) ― Terminal 1P (24-pin) — Terminal F (8-pin) With Bluetooth system ― Terminal 1N (24-pin) — Terminal G (10-pin) ― Terminal 1P (24-pin) — Terminal H (10-pin) ― Terminal 1H (24-pin) — Terminal F (10-pin) • Is there the continuity? | Yes | Replace the steering switch. (See STEERING SWITCH REMOVAL/INSTALLATION.)
No | Repair or replace the suspect wiring harness.