Pinpoint Test D: No Sound Output From Sub-Woofer

1. Check sub-woofer operation

Is the harness connector securely connected to the audio amplifier module and the sub-woofer unit?

Yes 

Proceed to the next step GO to D2  .

No 

Reconnect wiring harness to audio amplifier module/sub-woofer unit

1. Check Integrated Audio Module (IAM) operation

Is the integrated audio module operational?

Yes 

Proceed to the next step GO to D3  .

No 

Check the integrity of the power supply circuits/fuses to the integrated audio module and rectify as required. Check the integrated audio module for related DTCs and refer to the relevant DTC index

Are all sub-woofers working?

Yes 

Proceed to the next step GO to D4  .

No 

Use the fader control to direct audio output to different sub-woofer locations to establish which units are nonoperational. Refer to the electrical circuit diagrams and check the circuits between the audio amplifier module and the affected sub-woofer units for short circuit to ground, open circuit, high resistance. Repair circuit(s) as required. If fault persists, replace non-operational sub-woofer unit(s) as required

1. Check for any visible loose harness connections on sub-woofer drive unit

Are there any visible loose harness connections (ie: loose wires/pins) on the sub-woofer

Yes 

Replace the sub-woofer unit(s) as required

No 

No further action