AUDIO CONTROL SWITCH INSPECTION

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With Audio Unit

1.  Disconnect the negative battery cable and wait for 1 min or more.

2.  Remove the driver-side air bag module. (See DRIVER-SIDE AIR BAG MODULE REMOVAL/INSTALLATION.)

3.  Remove the steering wheel. (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)

4.  Verify the resistance and continuity between the audio control switch terminals.

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•  If the resistance and continuity are not as indicated in the tables, replace the audio control switch.

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5.  Apply battery positive voltage to audio control switch terminal E, and connect terminal D to ground.

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6.  Verify that the LED illuminates.

•  If the LED does not illuminate, replace the audio control switch.

With Car-navigation Unit

1.  Disconnect the negative battery cable and wait for 1 min or more.

2.  Remove the driver-side air bag module. (See DRIVER-SIDE AIR BAG MODULE REMOVAL/INSTALLATION.)

3.  Remove the steering wheel. (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)

4.  Verify the resistance and continuity between the audio control switch terminals.

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•  If the resistance and continuity are not as indicated in the tables, replace the audio control switch.

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5.  Apply battery positive voltage to audio control switch terminal E, and connect terminal D to ground.

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6.  Verify that the LED illuminates.

•  If the LED does not illuminate, replace the audio control switch.