Speaker Circuit Malfunction YQ2
WARNING: This page is about a different car, the 2009 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect the X1 harness connector at the audio amplifier.
- Radio ON, test for 5.0-7.5V between the appropriate audio signal circuit terminal listed below and ground.
- Left front low level (+) - terminal 1
- Left front low level (-) - terminal 17
- Right front low level (+) - terminal 2
- Right front low level (-) - terminal 18
- Left rear low level (+) - terminal 5
- Left rear low level (-) - terminal 21
- Right rear low level (+) - terminal 6
- Right rear low level (-) - terminal 22
- Center channel low level (+) - terminal 3
- Center channel and subwoofer low level audio common (-) - terminal 19
- Sub woofer low level (+) - terminal 4
- If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
- If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
- Ignition OFF, connect the X1 harness connector at the audio amplifier.
- Disconnect the X2 harness connector at the audio amplifier.
- Ignition ON, test for less than 1V between the appropriate speaker signal circuit terminal listed below and ground.
- Front center speaker output (+) - terminal 9
- Front center speaker output (-) - terminal 21
- Left front woofer speaker output (+) - terminal 13
- Left front woofer speaker output (-) - terminal 14
- Right front woofer speaker output (+) - terminal 11
- Right front woofer speaker output (-) - terminal 12
- Left rear midrange speaker output (+) - terminal 7
- Left rear midrange speaker output (-) - terminal 19
- Right rear midrange speaker output (+) - terminal 8
- Right rear midrange speaker output (-) - terminal 20
- Rear subwoofer speaker output (+) - terminal 4
- Rear subwoofer speaker output (-) - terminal 16
- If greater than the specified range, test the signal circuit for a short to voltage.
- Ignition OFF, test for infinite resistance between the appropriate terminal listed below and ground.
- Front center speaker output (+) - terminal 9
- Front center speaker output (-) - terminal 21
- Left front woofer speaker output (+) - terminal 13
- Left front woofer speaker output (-) - terminal 14
- Right front woofer speaker output (+) - terminal 11
- Right front woofer speaker output (-) - terminal 12
- Left rear midrange speaker output (+) - terminal 7
- Left rear midrange speaker output (-) - terminal 19
- Right rear midrange speaker output (+) - terminal 8
- Right rear midrange speaker output (-) - terminal 20
- Rear subwoofer speaker output (+) - terminal 4
- Rear subwoofer speaker output (-) - terminal 16
- If less than the specified value, test the signal circuit for a short to ground.
- Reconnect all harness connectors at the amplifier. Disconnect the harness connector at the appropriate speaker.
- Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminals listed below and ground.
- Center console speaker- terminal A and B
- Center I/P speaker- terminal A and B
- Driver seat left- terminal A and B
- Driver seat right- terminal A and B
- Front tweeters- terminal A and B
- Front speakers- terminal A and B
- Front subwoofer speakers- terminal D and E
- Rear compartment speakers - terminal A and B
- Rear speakers- terminal A and B
- Passenger seat left speaker - terminal A and B
- Passenger seat right speaker - terminal A and B
- Rear subwoofer - terminal Dand E
- If less than the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the amplifier.
- If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the amplifier.
- If all circuits test normal, replace the speaker.