1. Disconnect the negative battery cable..
2. Disconnect the connector..
3. Verify the resistance between bass-box terminals.

If not within the specification, replace the bass-box.

0.9—1.1 ohms
Auxiliary Jack/Usb Port Removal/Installation
Bass Box Removal/InstallationClimate Control Unit Inspection [Manual Air Conditioner]
1. Remove the climate control unit with the connector connected..
2. Switch the ignition to ON.
3. Connect the negative (-) lead of the tester to the body ground.
4. By inserting the positive (+) lead of the tester into the climate control
unit connector, measure the voltage according to the ...
Supplier Identification Procedure [Audio]
Identification Using the Label or Inscribed Lettering
1. Disconnect the negative battery cable..
2. Remove the center panel..
3. Remove the audio unit..
4. Verify the supplier by referring to the label attached to each unit.
Verify Using the Diagnostic Assist Function
Without display
...
Trunk Lid Opener Switch Inspection
1. Disconnect the negative battery cable..
2. Remove the trunk lid trim..
3. Remove the high-mount brake light..
4. Remove the trunk lid opener switch..
5. Verify the continuity of trunk lid opener switch terminals A and B.
6. Verify that the continuity is as indicated in the table.
...