2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 388
DTC B1055 04
- Audio Output 4 Right Rear Circuit Open
DTC B1065 01
- Audio Output 5 Circuit Short to Battery (Center IP)
DTC B1065 02
- Audio Output 5 Circuit Short to Ground (Center IP)
DTC B1065 04
- Audio Output 5 Circuit Open (Center IP)
DTC B1075 01
- Audio Output 6 Circuit Short to Battery (Subwoofer)
DTC B1075 02
- Audio Output 6 Circuit Short to Ground (Subwoofer)
DTC B1075 04
- Audio Output 6 Circuit Open (Subwoofer)
DTC B1085 01
- Audio Output 7 Circuit Short to Battery (LR D-Pillar)
DTC B1085 02
- Audio Output 7 Circuit Short to Ground (LR D-Pillar)
DTC B1085 04
- Audio Output 7 Circuit Open (LR D-Pillar)
DTC B1095 01
- Audio Output 8 Circuit Short to Battery (RR D-Pillar)
DTC B1095 02
- Audio Output 8 Circuit Short to Ground (RR D-Pillar)
DTC B1095 04
- Audio Output 8 Circuit Open (RR D-Pillar)
Diagnostic Fault Information
Circuit/System Description
Each of the audio output channel circuits (+) and (-), at the radio and audio amplifier have a DC bias voltage that is one half of the battery voltage.
When using a DMM, each of the audio output channel circuits will measure approximately 6.5V DC. The audio being played on the system is
produced by a varying AC voltage that is centered around the DC bias voltage on the same circuit. The AC voltage is what causes the speaker cone
to move and produce sound. This voltage will vary depending on what type of audio is being listened to, talk or music, and type of music, as well as
the volume setting of the system. Low volume and talk settings will measure around 1V AC and less, where constant music may measure 3V AC
and slightly higher.
Conditions for Running the DTC
