Test L: The Subwoofer Is Inoperative Navigation System

PINPOINT TEST L: THE SUBWOOFER IS INOPERATIVE - NAVIGATION SYSTEM

L1:

L2-L4:

L4-L6:

L6-L8:

L8 Continued:

Normal Operation
The subwoofer is powered by the same audio unit amplifier that powers the door speakers. The audio unit sends an enable signal to the audio unit amplifier through circuit 173 (DG/VT)

Possible Causes
- circuit 167 (BN/OG) open or short to ground
- circuit 168 (RD/BK) open or short to ground
- circuit 174 (GY/BK) open or short to ground
- circuit 176 (PK/LG) open
- circuit 179 (OG/RD) open
- circuit 187 (DB/OG) open
- circuit 189 (TN/LB) open
- subwoofer
- audio unit amplifier
- audio unit