Part 4

• If less than the specified range, test the appropriate 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 appropriate signal circuit for a short to voltage. If the circuit tests normal, replace the radio.

6. Ignition OFF, disconnect the X1 and X2 harness connectors at the amplifier.
7. Ignition ON, test for less than 1 volt between each of the signal circuit terminals listed below and ground.

* Left front speaker output (+)- terminal 5 X1
* Left front speaker output (-)-terminal 1 X1
* Right front speaker output (+)- terminal 8 X2
* Right front speaker output (-) -terminal 7 X2
* Left rear speaker output (+) -terminal 15 X2
* Left rear speaker output (-) -terminal 16 X2
* Right rear speaker output (+)- terminal 2 X2
* Right rear speaker output (-)- terminal 1 X2
* Front center speaker output (+) -terminal 4 X2
* Front center speaker output (-)-terminal 3 X2
* Rear compartment speaker output (+) -terminal 6 X2
* Rear compartment speaker output (-) -terminal 5 X2
* Subwoofer speaker output (+)- terminal 7 X1
* Subwoofer speaker output (-) -terminal 3 X1

• If greater than the specified value, test both signal circuits of the affected speaker for a short to voltage.

8. Ignition OFF, test for infinite resistance between each of the signal circuit terminals listed below and ground.

* Left front speaker output (+)- terminal 5 X1
* Left front speaker output (-)-terminal 1 X1
* Right front speaker output (+)- terminal 8 X2
* Right front speaker output (-) -terminal 7 X2
* Left rear speaker output (+) -terminal 15 X2
* Left rear speaker output (-) -terminal 16 X2
* Right rear speaker output (+)- terminal 2 X2
* Right rear speaker output (-)- terminal 1 X2
* Front center speaker output (+) -terminal 4 X2
* Front center speaker output (-)-terminal 3 X2
* Rear compartment speaker output (+) -terminal 6 X2
* Rear compartment speaker output (-) -terminal 5 X2
* Subwoofer speaker output (+)- terminal 7 X1
* Subwoofer speaker output (-) -terminal 3 X1

• If less than the specified value, test both signal circuits of the affected speaker for a short to ground.

9. Reconnect all harness connectors at the amplifier. Disconnect the harness connector at the appropriate speaker.
10. Radio ON, test for 5.0-7.5 V between each of the appropriate signal circuit terminals listed below and ground.

* Front A pillar speakers - terminals A and B
* Center IP speaker- terminals A and B
* Door speakers - terminals A and B
* Rear compartment speakers- terminals A and B
* Subwoofer speaker - terminals A and B

• 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 audio amplifier.
• If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the audio amplifier.

11. If all circuits test normal, replace the speaker.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Speaker Replacement Reference (Speaker Replacement Reference)
* Control Module References (Programming and Relearning) for audio amplifier, radio or auxiliary radio/HVAC control replacement, setup, and programming.