Rear Seat Audio (RSA) Control (Inputs)

^ Circuit 8 (terminal A6): Variable voltage input from the IM when the headlamp switch is in the PARK or HEAD position. Provides voltage for control illumination at night.
^ Circuit 43 (terminal A8): High with ignition switch in ACC or RUN position. Provides voltage to the RSA control.
^ Circuit 46 (terminal A2): Right rear channel radio audio (+) input from radio. When the RSA is on (and CKT 906 is high), radio audio is sent to the headphone jacks. When the RSA is oft (CKT 906 is low), radio audio is sent to the Interface Module (1M) and then sent to the rear speakers, as long as the AVM is off.
^ Circuit 115 (terminal A1): Right rear channel radio audio (+) input from radio. When the RSA is on (and CKT 906 is high), radio audio is sent to the headphone jacks. When the RSA is oft (CKT 906 is low), radio audio is sent to the Interface Module (IM) and then sent to the rear speakers, as long as the AVM is off.
^ Circuit 116 (terminal A3): Left rear channel radio audio (-) input from radio. When the RSA is on (and CKT 906 is high), radio audio is sent to the headphone jacks. When the RSA is oft (CKT 906 is low), radio audio is sent to the Interface Module (IM) and then sent to the rear speakers, as long as the AVM is off.
^ Circuit 199 (terminal A4): Left rear channel radio audio (+) input from radio. When the RSA is on (and CKT 906 is high), radio audio is sent to the headphone jacks. When the RSA is off (CKT 906 is low), radio audio is sent to the Interface Module (IM) and then sent to the rear speakers, as long as the AVM is off.
^ Circuit 351 (terminal B6): Provides ground for RSA operation.
^ Circuit 906 (terminal B5): High with the rear seat audio mode enabled. When high, the RSA connects the headphone jacks to the rear speaker audio radio output.