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CONFIRMATION STEP 2: AUDIO CONTROL SWITCH CONFIRMATION

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

STEP | INSPECTION | ACTION
--- | --- | ---
1 | • Is the symptom related to either the audio control switch or 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 connector (24-pin). • Inspect both the audio unit and wiring harness-side connectors for poor connection. (such as damaged/pulled-out pins, corrosion). - Terminal N (ST SW 1) - Terminal P (ST SW 2) Are all the pins normal? | Yes | Go to the next step.
No | If the audio unit side connector is wrong: • Replace the audio unit. 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 N and P 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 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 E (8-pin) • Is there the continuity? | Yes | Replace the audio control switch.
No | Repair or replace the suspect wiring harness.