For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | Diagnostic Procedure Instructions provides an overview of each diagnostic category.

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Amplifier B+ | 2 | 2 | -- | --
Entertainment Remote Enable Signal | 2 | 2 | -- | --
Audio Signal Circuit (+)/ Low Level Audio Signal Circuit (+) | B10XX 02*,** | 1 | B10XX 01*,** | --
Audio Signal Circuit (-)/ Low Level Audio Signal Circuit (-) | B10XX 02*,** | 1 | B10XX 01*,** | --
Radio Audio Mute Signal | B1287 02 | B1287 04 | B1287 01 | --
Amplifier Ground | -- | 2 | -- | --
1. No or reduced sound from speaker 2. Amplifier inoperative/no sound from speakers * Sets associated speaker DTC with appropriate symptom type ** Noticeable audio distortion possible

### 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. In an amplified audio system, these similar AC voltage measurements may be slightly higher on the output of the amplifier, and the typical AC voltage readings at the output of the radio are less than 1V AC.

### Diagnostic Aids

• | Improper speaker mounting or loose trim may cause an audible buzz or distortion. Inspect the appropriate speaker and the surrounding interior trim for proper and secure mounting. If the speaker or surrounding interior trim is found to be loose or improperly secured, correctly secure the item.

• | When equipped with an amplifier, it is possible for some individual circuit faults to affect more than one speakers operation. Perform diagnostic tests in the sequence listed to avoid misdiagnosis.

### Reference Information

#### Schematic Reference

Radio/Navigation System Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Radio/Audio System Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Verification

#### Without Amplifier

Radio ON, verify clear audio is heard from each audio speaker controlled by the radio.

⇒ | If audio is inoperative from all speakers, replace the radio.

⇒ | If audio is inoperative from one or more, but not all, speakers or the audio emitted from the speakers is not clear, refer to Speaker Circuit Malfunction - without Amplifier.

#### With Amplifier

Radio ON, verify clear audio is heard from each audio speaker controlled by the audio amplifier.

⇒ | If audio is inoperative from all speakers, refer to Amplifier Circuit Malfunction.

⇒ | If audio is inoperative from one or more, but not all, speakers or the audio emitted from the speakers is not clear, refer to Speaker Circuit Malfunction - with Amplifier.

### Circuit/System Testing

#### Speaker Circuit Malfunction-- without Amplifier without UK6

1. Ignition OFF, disconnect the harness connector at the appropriate speaker.
2. Ignition ON, radio ON, test for 5.0-7.5 V between the signal circuit terminal A and ground.

⇒ | If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.

⇒ | 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.

3. Test for 5.0-7.5 V between the signal circuit terminal B and ground.

⇒ | If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.

⇒ | 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.

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

#### Speaker Circuit Malfunction-- without Amplifier with UK6

1. Ignition OFF, disconnect the X2 harness connector at the Auxiliary Radio/HVAC Control.
2. Ignition ON, radio ON, test for 5.0-7.5 V between the appropriate signal circuit terminal listed below and ground.

• | Left Rear Low Level Audio Signal (+) terminal 1

• | Left Rear Low Level Audio Signal (-) terminal 2

• | Right Rear Low Level Audio Signal (+) terminal 3

• | Right Rear Low Level Audio Signal (-) terminal 4

⇒ | If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.

⇒ | 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.

3. Ignition OFF, reconnect the X2 harness connector at the Auxiliary Radio/HVAC Control. Disconnect the harness connector at the appropriate speaker.
4. Ignition ON, radio ON, test for 5.0-7.5 V between the signal circuit terminal A and ground.

⇒ | If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal for front speaker circuits, replace the radio; for rear speaker circuits, replace the auxiliary radio/HVAC control.

⇒ | 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 for front speaker circuits, replace the radio; for rear speaker circuits, replace the auxiliary radio/HVAC control.

5. Test for 5.0-7.5 V between the signal circuit terminal B and ground.

⇒ | If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal for front speaker circuits, replace the radio; for rear speaker circuits, replace the auxiliary radio/HVAC control.

⇒ | 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 for front speaker circuits, replace the radio; for rear speaker circuits, replace the auxiliary radio/HVAC control.

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

#### Amplifier Circuit Malfunction

1. Ignition OFF, disconnect the X1 harness connector at the audio amplifier.
2. Ignition OFF, test for less than 10 Ω between the appropriate ground circuit terminal listed below and ground.

• | terminal 5 (UQG)

• | terminal 8 (UQA/ UQS)

⇒ | If greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify a test lamp illuminates between the appropriate B+ circuit terminal listed below and ground.

• | terminal 1 (UQG)

• | terminal 4 (UQA/ UQS)

⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the audio amplifier.

4. Ignition OFF, disconnect the X3 harness connector at the audio amplifier.
5. Radio ON, test for B+ between the appropriate entertainment remote enable signal circuit terminal listed below and ground.

• | terminal 12 (UQG)

• | terminal 8 ( UQA/UQS)

⇒ | 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.

6. Test for 0.5-1.0 V between the appropriate mute signal circuit terminal listed below and ground.

• | terminal 4 (UQG)

• | terminal 11 (UQA or UQS)

⇒ | 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.

7. If all circuits test normal, replace the audio amplifier.

#### Speaker Circuit Malfunction - with Amplifier UQG without UK6

1. Ignition OFF, disconnect the X3 harness connector at the audio amplifier.
2. Radio ON, test for 5.0-7.5 V between the appropriate signal circuit terminal listed below and ground.

• | Left front low level audio signal (+) -terminal 5

• | Left front low level audio signal (-) -terminal 13

• | Right front low level audio signal (+) -terminal 6

• | Right front low level audio signal (-) -terminal 14

• | Left rear low level audio signal (+) -terminal 7

• | Left rear low level audio signal (-) -terminal 15

• | Right rear low level audio signal (+) -terminal 8

• | Right rear low level audio signal (-) -terminal 16

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

⇒ | 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.

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

• | Left subwoofer speaker output (+) -terminal 3 X1

• | Left subwoofer speaker output (-)-terminal 7 X1

• | Right subwoofer speaker output (+)- terminal 4 X1

• | Right subwoofer speaker output (-) -terminal 8 X1

• | Left front speaker output (+)- terminal 1 X2

• | Left front speaker output (-)-terminal 9 X2

• | Right front speaker output (+)- terminal 2 X2

• | Right front speaker output (-) -terminal 10 X2

• | Left rear speaker output (+) -terminal 3 X2

• | Left rear speaker output (-) -terminal 11 X2

• | Right rear speaker output (+)- terminal 4 X2

• | Right rear speaker output (-)- terminal 12 X2

• | Front center speaker output (+) -terminal 5 X2

• | Front center speaker output (-)-terminal 13 X2

• | Rear compartment speaker output (+) -terminal 6 X2

• | Rear compartment speaker output (-) -terminal 14 X2

⇒ | If greater than the specified range, test both signal circuits of the affected speaker for a short to voltage.

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

• | Left subwoofer speaker output (+) -terminal 3 X1

• | Left subwoofer speaker output (-)-terminal 7 X1

• | Right subwoofer speaker output (+)- terminal 4 X1

• | Right subwoofer speaker output (-) -terminal 8 X1

• | Left front speaker output (+)- terminal 1 X2

• | Left front speaker output (-)-terminal 9 X2

• | Right front speaker output (+)- terminal 2 X2

• | Right front speaker output (-) -terminal 10 X2

• | Left rear speaker output (+) -terminal 3 X2

• | Left rear speaker output (-) -terminal 11 X2

• | Right rear speaker output (+)- terminal 4 X2

• | Right rear speaker output (-)- terminal 12 X2

• | Front center speaker output (+) -terminal 5 X2

• | Front center speaker output (-)-terminal 13 X2

• | Rear compartment speaker output (+) -terminal 6 X2

• | Rear compartment speaker output (-) -terminal 14 X2

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

6. Reconnect all harness connectors at the amplifier. Disconnect the harness connector at the appropriate speaker.
7. 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 assembly- terminals A, B, C, and D

⇒ | 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.

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

#### Speaker Circuit Malfunction - with Amplifier UQA/UQS without UK6

1. Ignition OFF, disconnect the X3 harness connector at the audio amplifier.
2. Radio ON, test for 5.0-7.5 V between the appropriate signal circuit terminal listed below and ground.

• | Center channel low level audio signal (+) -terminal 3

• | Center channel low level audio signal (+) -terminal 2

• | Left front low level audio signal (+) -terminal 15

• | Left front low level audio signal (-) -terminal 7

• | Right front low level audio signal (+) -terminal 14

• | Right front low level audio signal (-) -terminal 6

• | Left rear low level audio signal (+) -terminal 13

• | Left rear low level audio signal (-) -terminal 5

• | Right rear low level audio signal (+) -terminal 12

• | Right rear low level audio signal (-) -terminal 4

• | Subwoofer low level audio signal (+) -terminal 1

• | Subwoofer low level audio signal (+) -terminal 9

⇒ | 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.

3. Ignition OFF, disconnect the X1 and X2 harness connectors at the amplifier.
4. 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.

5. 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.

6. Reconnect all harness connectors at the amplifier. Disconnect the harness connector at the appropriate speaker.
7. 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.

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

#### Speaker Circuit Malfunction - with Amplifier UQG with UK6

1. Ignition OFF, disconnect the X2 harness connector at the Auxiliary Radio/HVAC Control.
2. Ignition ON, radio ON, test for 5.0-7.5 V between the appropriate signal circuit terminal listed below and ground.

• | Left Rear Low Level Audio Signal (+) - terminal 1

• | Left Rear Low Level Audio Signal (-) - terminal 2

• | Right Rear Low Level Audio Signal (+) - terminal 3

• | Right Rear Low Level Audio Signal (-) - 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.

3. Ignition OFF, reconnect the X2 harness connector at the Auxiliary Radio/HVAC Control. Disconnect the X3 harness connector at the audio amplifier.
4. Radio ON, test for 5.0-7.5 V between the appropriate signal circuit terminal listed below and ground.

• | Left rear low level audio signal (+) -terminal 7

• | Left rear low level audio signal (-) -terminal 15

• | Right rear low level audio signal (+) -terminal 8

• | Right rear low level audio signal (-) -terminal 16

⇒ | 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 auxiliary radio/HVAC control.

⇒ | If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the auxiliary radio/HVAC control.

5. Test for 5.0-7.5 V between the appropriate signal circuit terminal listed below and ground.

• | Left front low level audio signal (+) terminal 5

• | Left front low level audio signal (-) terminal 13

• | Right front low level audio signal (+) terminal 6

• | Right front low level audio signal (-) terminal 14

⇒ | 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.

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 subwoofer speaker output (+) -terminal 3 X1

• | Left subwoofer speaker output (-)-terminal 7 X1

• | Right subwoofer speaker output (+)- terminal 4 X1

• | Right subwoofer speaker output (-) -terminal 8 X1

• | Left front speaker output (+)- terminal 1 X2

• | Left front speaker output (-)-terminal 9 X2

• | Right front speaker output (+)- terminal 2 X2

• | Right front speaker output (-) -terminal 10 X2

• | Left rear speaker output (+) -terminal 3 X2

• | Left rear speaker output (-) -terminal 11 X2

• | Right rear speaker output (+)- terminal 4 X2

• | Right rear speaker output (-)- terminal 12 X2

• | Front center speaker output (+) -terminal 5 X2

• | Front center speaker output (-)-terminal 13 X2

• | Rear compartment speaker output (+) -terminal 6 X2

• | Rear compartment speaker output (-) -terminal 14 X2

⇒ | 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 subwoofer speaker output (+) -terminal 3 X1

• | Left subwoofer speaker output (-)-terminal 7 X1

• | Right subwoofer speaker output (+)- terminal 4 X1

• | Right subwoofer speaker output (-) -terminal 8 X1

• | Left front speaker output (+)- terminal 1 X2

• | Left front speaker output (-)-terminal 9 X2

• | Right front speaker output (+)- terminal 2 X2

• | Right front speaker output (-) -terminal 10 X2

• | Left rear speaker output (+) -terminal 3 X2

• | Left rear speaker output (-) -terminal 11 X2

• | Right rear speaker output (+)- terminal 4 X2

• | Right rear speaker output (-)- terminal 12 X2

• | Front center speaker output (+) -terminal 5 X2

• | Front center speaker output (-)-terminal 13 X2

• | Rear compartment speaker output (+) -terminal 6 X2

• | Rear compartment speaker output (-) -terminal 14 X2

⇒ | If less than the specified vallue, 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 assembly- terminals A, B, C, and D

⇒ | 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.

#### Speaker Circuit Malfunction - with Amplifier UQA/UQS with UK6

1. Ignition OFF, disconnect the X2 harness connector at the Auxiliary Radio/HVAC Control.
2. Ignition ON, radio ON, test for 5.0-7.5 V between the appropriate signal circuit terminal listed below and ground.

• | Left Rear Low Level Audio Signal (+) terminal 1

• | Left Rear Low Level Audio Signal (-) terminal 2

• | Right Rear Low Level Audio Signal (+) terminal 3

• | Right Rear Low Level Audio Signal (-) 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.

3. Ignition OFF, reconnect the X2 harness connector at the Auxiliary Radio/HVAC Control. Disconnect the X3 harness connector at the audio amplifier.
4. Radio ON, test for 5.0-7.5 V between the appropriate signal circuit terminal listed below and ground.

• | Left rear low level audio signal (+) terminal 13

• | Left rear low level audio signal (-) terminal 5

• | Right rear low level audio signal (+) terminal 12

• | Right rear low level audio signal (-) terminal 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 auxiliary radio/HVAC control.

⇒ | If greater than the specified range, test the appropriate signal circuit for a short to voltage. If the circuit tests normal, replace the auxiliary radio/HVAC control.

5. Radio ON, test for 5.0-7.5 V between the appropriate signal circuit terminal listed below and ground.

• | Center channel low level audio signal (+) -terminal 3

• | Center channel low level audio signal (+) -terminal 2

• | Left front low level audio signal (+) -terminal 15

• | Left front low level audio signal (-) -terminal 7

• | Right front low level audio signal (+) -terminal 14

• | Right front low level audio signal (-) -terminal 7

• | Subwoofer low level audio signal (+) -terminal 1

• | Subwoofer low level audio signal (+) -terminal 9

⇒ | 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 after completing the diagnostic procedure.

• | Speaker Replacement Reference

• | Control Module References for audio amplifier, radio or auxiliary radio/HVAC control replacement, setup, and programming.