Cellular System, Entertainment System, and Navigation System Buick Enclave I

Connector End View Reference

Navigation System Description and Operation

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

IMPORTANT

Diagnose any antilock brake system (ABS) related DTCs before performing this diagnostic.

Ignition OFF, disconnect the X4 harness connector at the radio.
Ignition ON, operate the vehicle drive wheels at 5 mph. Test for 3-7 Hertz between the VSS circuit terminal 5 and ground. If not within the specified range, test the VSS circuit for an open, high resistance, short to ground or short to voltage. If the circuit tests normal replace the EBCM.
If the circuit tests normal, replace the radio.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for radio or EBCM replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
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

Each of the audio output channel circuits (+) and (-), at the radio and audio amplifier (if equipped) 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 6.5 V 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 3 V 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 .

Radio ON.
Battery voltage must be between 9-16 V.

The radio detects a short to voltage or short to ground in any of the low level audio signal circuits (+) and (-).

No sound is present from one or more of the speakers.

The condition responsible for setting the DTC no longer exists.
A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Without Amplifier without UK6

Ignition OFF, disconnect the harness connector at the appropriate speaker.
Radio ON, test for 5.0-7.5 V between the signal circuit terminal A and ground. 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.
Test for 5.0-7.5 V between the signal circuit terminal B and ground. 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.
If all circuits test normal, replace the speaker.

Without Amplifier with UK6

Ignition OFF, disconnect the X2 harness connector at the Auxiliary Radio/HVAC Control.
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.
Ignition OFF, reconnect the X2 harness connector at the Auxiliary Radio/HVAC Control. Disconnect the harness connector at the appropriate speaker.
Radio ON, test for 5.0-7.5 V between the signal circuit terminal A and ground. 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. 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.
Test for 5.0-7.5 V between the signal circuit terminal B and ground. 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. 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 all circuits test normal, replace the speaker.

With Amplifier UQG without UK6

Ignition OFF, disconnect the X3 harness connector at the audio amplifier.
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 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.
If all circuits test normal, replace the audio amplifier.

With Amplifier UQA/UQS without UK6

Ignition OFF, disconnect the X3 harness connector at the audio amplifier.
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 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 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.
If all circuits test normal, replace the audio amplifier.

With Amplifier UQG with UK6

Ignition OFF, disconnect the X2 harness connector at the Auxiliary Radio/HVAC Control.
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.
Ignition OFF, reconnect the X2 harness connector at the Auxiliary Radio/HVAC Control. Disconnect the X3 harness connector at the audio amplifier.
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.
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 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.
If all circuits test normal, replace the audio amplifier.

With Amplifier UQA/UQS with UK6

Ignition OFF, disconnect the X2 harness connector at the Auxiliary Radio/HVAC Control.
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.
Ignition OFF, reconnect the X2 harness connector at the Auxiliary Radio/HVAC Control. Disconnect the X3 harness connector at the audio amplifier.
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 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.
Test for 5.0-7.5 V between the appropriate signal circuit terminal listed below and ground. 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 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.
If all circuits test normal, replace the audio amplifier.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Speaker Replacement Reference»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system__speaker-replacement-reference)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for audio amplifier, radio or auxiliary radio/HVAC control replacement, setup, and programming.

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
B+ Voltage		1
Ground		1
Left Audio Signal (+)	2	2	2
Left Audio Signal (-)	2	2	2
Right Audio Signal (+)	3	3	3
Right Audio Signal (-)	3	3	3
Digital Radio Antenna Coax	B1259 02	B1259 05	B1259 05
1. No communication with DRR/XM not available 2. No or distorted audio from left side speakers when listening to digital radio 3. No or distorted audio from right side speakers when listening to digital radio

The digital radio receiver (DRR) receives an XM satellite radio signal via the digital radio antenna. This signal is passed to the DRR through the digital radio antenna coax. The DRR sends a varying AC mV signal through separate left and right audio circuits (+ and -) to the radio. The voltage amount and rate of change is dependent upon the type of signal being received. The radio then processes these signals and passes the audio to the appropriate speakers or amplifier.

When diagnosing digital radio concerns, the vehicle should be located outside with an unobstructed view of the southern sky to ensure proper reception of the satellite signal. Reception may limited, intermittent or not possible inside structures or under heavy cover.

Radio ON.
Battery voltage must be between 9-16 volts.

B1259 02

The DTC will set when the DRR detects a short to ground in the antenna ground circuit.

B1259 05

The DTC will set when the DRR detects a short to voltage or an open/high resistance in the antenna ground circuit.

Digital radio reception may be poor or not available.
The radio displays "No XM Signal" or "Check Antenna".

The condition responsible for setting the DTC no longer exists.
A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-48028 Digital Radio Test Antenna

With the vehicle outside in an area with an unobstructed view of the southern sky, tune to XM. Verify XM reception is clear and the No XM Signal message is not displayed on the radio.

Ignition OFF, disconnect the antenna coax from the DRR. Connect the EL-48028 digital radio test antenna to the DRR.
Radio ON, tuned to XM, verify DTC B1259 is not set. If the DTC is set, replace the DRR.
Ignition OFF, reconnect the antenna coax to the DRR, disconnect the digital radio antenna coax from the digital radio antenna.
Ignition ON, test for 4.5-5.5 V between the antenna coax center terminal and the coax outer shield. If not within the specified range, replace the antenna coax.
If all circuits test normal, replace the digital radio antenna.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Digital Radio Antenna Replacement»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Digital Radio Antenna Cable Replacement»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for DRR replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Radio Mute Signal	B1287 02	B1287 04	B1287 01

The radio provides a remote amplifier mute output circuit to control overall muting of the remote amplifier. The amplifier receives pulse width modulated (PWM) signals on the control circuit at varying duty cycle percentages for controlling muted and unmuted functions of the amplifier. Circuitry internal to the radio monitors the remote amplifier mute circuit for faults and sets the appropriate DTC when faults are detected.

Radio ON.
The system voltage is between 9-16 V

A short to voltage, short to ground, or an open is seen on the remote enable circuit.

The radio sets the DTC and continues to output the correct muted or unmuted amplifier state based on the fault condition on the circuit.

A current DTC clears when the condition for setting the DTC is no longer present.
A history DTC clears after 100 malfunction- free ignition cycles.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Radio ON, adjust the fade and balance control to verify audio is present at each individual channel.

Ignition OFF, disconnect the X3 harness connector at the audio amplifier.
Ignition ON, Radio ON, Mute OFF, test for test for less than 1.0 V between the appropriate signal circuit terminal listed below and ground. terminal 4 (UQG) terminal 11 (UQA/UQS) If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
If all circuits test normal, replace the audio amplifier.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for Audio Amplifier or Radio replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
DVD Display B+	1	1	1
Radio ON Signal	1	1	1
Video Display Brightness Signal	B1289 02	B1289 04	B1289 01
Video Display Mode Control	B1288 02	B1288 04	B1288 01
Video High Signal	1	1	1
Video Low Signal	1	1	1
DVD Display Ground		1
1. Video Entertainment System Inoperative.

The radio can control the video display mode on vehicles equipped with rear seat entertainment (RSE) video. The radio varies a pulse with modulated (PWM) signal to the rear entertainment video screen to command the display mode.

Ignition ON.
Battery voltage must be between 9-16 volts.

The DTC will set when the radio detects a short to voltage, short to ground, or an open/high resistance in the video display mode control circuit 400 ms after the radio activates the remote enable circuit.

The radio sets the DTC and defaults the video display to normal mode.

The condition responsible for setting the DTC no longer exists.
A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Video Entertainment System Description and Operation (Non-Headrest DVD Systems) , Video Entertainment System Description and Operation (Dual Headrest DVD Systems)

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition OFF, disconnect the harness connector at the rear video display.
Ignition ON, test for 100-300 Hz at the control circuit terminal 10. If not within the specified range, test the control circuit for a short to voltage, short to ground, or an open/high resistance. If the circuit tests normal, replace the radio.
If all circuits test normal, replace the rear video display.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Video Display Replacement (U42/C3U)»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system) , «Video Display Replacement (U42)»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Radio replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
DVD Display B+	1	1	1
Radio ON Signal	1	1	1
Video Display Brightness Control	B1289 02	B1289 04	B1289 01
Video Display Mode Control	B1288 02	B1288 04	B1288 01
Video High Signal	1	1	1
Video Low Signal	1	1	1
DVD Display Ground		1
1. Video Entertainment System Inoperative.

The radio can control the video display brightness on vehicles equipped with rear seat entertainment (RSE) video. The radio varies a pulse with modulated (PWM) signal to the rear entertainment video screen to command the screen brightness to the desired level.

Ignition ON.
Battery voltage must be between 9-16 volts.

The DTC will set when the radio detects a short to voltage, short to ground, or an open/high resistance in the video display brightness control circuit 400 ms after the radio activates the remote enable circuit.

The radio sets the DTC and defaults the video display to full brightness.

The condition responsible for setting the DTC no longer exists.
A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Video Entertainment System Description and Operation (Non-Headrest DVD Systems) , Video Entertainment System Description and Operation (Dual Headrest DVD Systems)

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition OFF, disconnect the harness connector at the rear video display.
Ignition ON, test for 100-300 Hz at the control circuit terminal 9. If not within the specified range, test the control circuit for a short to voltage, short to ground, or an open/high resistance. If the circuit tests normal, replace the radio.
If all circuits test normal, replace the rear video display.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Video Display Replacement (U42/C3U)»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system) , «Video Display Replacement (U42)»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Radio replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Infrared Module Voltage Signal	B1449 03	B1449 03	B1449 07

The infrared module is supplied with 10.5 volts from the rear audio/HVAC module when the rear audio system is active. The infrared module is permanently grounded at G300.

Ignition ON.
Battery voltage must be between 9-16 volts.

The DTC will set when the rear audio/HVAC module detects a short to voltage, short to ground, or an open/high resistance in the infrared module voltage signal circuit.

The rear audio/HVAC module sets the DTC and the infrared module will be disabled.

The condition responsible for setting the DTC no longer exists.
A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Video Entertainment System Description and Operation (Non-Headrest DVD Systems) , Video Entertainment System Description and Operation (Dual Headrest DVD Systems)

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition OFF, disconnect the harness connector at the infrared module.
Ignition OFF, test for less than 5.0 ohms between the ground circuit terminal 12 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
Ignition ON, rear audio ON, test for 10.0-11.0 volts between the supply voltage circuit terminal 4 and ground. If less than the specified range, test the voltage supply circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the rear audio/HVAC module. If greater than the specified range, test the voltage supply circuit for a short to voltage. If the circuit tests normal, replace the rear audio/HVAC module.
If all circuits test normal, replace the infrared module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Audio System Transceiver Module Replacement (U42)»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system) , «Audio System Transceiver Module Replacement (U42/C3U)»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Rear Audio/HVAC Module replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provide an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
Cellular Microphone Signal	B2455 02	B2455 04
Cellular Microphone Low Reference		B2455 04	1
1. OnStar Microphone Inoperative - Caller Cannot Be Heard

The vehicle communication interface control module provides the cellular phone microphone with a supplied voltage on the cellular phone microphone signal circuit. When the microphone is in use, voice data from the user is sent back to the vehicle communication interface control module on the signal circuit. The vehicle communication interface control module provides a ground for the cellular phone microphone via the low reference wire.

The ignition must be in the RUN or ACC position.
The system voltage is at least 9.5 V and no more than 15.5 V.
All the above conditions are present for greater than 10 seconds.

B2455 02

The vehicle communication interface control module detects an short to ground in the cellular phone microphone signal circuit for 10 seconds or greater.

B2455 04

The following conditions will set this DTC

The vehicle communication interface control module detects an open/high resistance in the cellular phone microphone signal circuit for 10 seconds or greater.
The vehicle communication interface control module detects an open/high resistance in the low reference circuit for 10 seconds or greater.

The OnStar® status LED turns red.
The vehicle communication interface control module will not receive a signal from the cellular phone microphone.
Calls can be placed but the caller cannot be heard.

The condition responsible for setting the DTC no longer exists.
A history DTC will clear once 50 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition OFF, disconnect the harness connector at the cellular phone microphone.
Ignition ON, test for 9.5-10.5 V between the signal circuit terminal B and ground. If less than the specified range, test the circuit for a short to ground, shorted together, or an open/high resistance. If the circuit tests normal, replace the vehicle communication interface control module. If greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the vehicle communication interface control module.
Test for 9.5-10.5 V between the signal circuit terminal B and the low reference circuit terminal A. If less than the specified range, test the low reference circuit for a short to ground, shorted together, or an open/high resistance. If the circuit tests normal, replace the vehicle communication interface control module. If greater than the specified range, test the low reference circuit for a short to voltage. If the circuit tests normal, replace the vehicle communication interface control module.
If all circuit test normal, replace the cellular phone microphone.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Mobile Telephone Microphone Replacement»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for vehicle communication interface control module replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The vehicle communications interface module (VCIM) receives information from the radio antenna located on the outside of the vehicle. The radio antenna is connected to the telematics communication interface control module via a shielded coaxial cable. The antenna cable also provides a path for DC current for powering the radio antenna.

Ignition is in the RUN or ACC position.
System voltage is between 9.5 V and 15.5 V.
The above conditions are present for greater than 1 second.

B2462 02

The vehicle communications interface module detects a short to ground on the navigation antenna signal circuit.

B2462 04

The vehicle communications interface module detects an open/high resistance on the navigation antenna signal circuit.

The OnStar® status LED turns red.
The OnStar® Call Center cannot locate the vehicle.

The condition responsible for setting the DTC no longer exists.
A history DTC will clear once 50 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-49903 GM OnStar Antenna Diagnostic Tool Kit

Note. The following verification requires the vehicle to be outside with an unobstructed view of the southern sky. Allow 5 minutes after turning key on for the GPS satellites to acquire vehicle signal.

Ignition ON, wait 5 minutes, then contact the OnStar call center consultant by pressing the blue OnStar button. A call center consultant should answer the call, verifying the vehicle OnStar system is functioning and the consultant can locate the vehicle.

Ignition OFF, disconnect the GPS and cell coax cable connector at the vehicle communication interface module.
Using the EL-49903-3 kit (EL-49903-5 adapter and EL-49903-4 coax cable), connect the EL-49903 GM OnStar antenna diagnostic tool kit to the vehicle communication interface module, place the test antenna on the roof of the vehicle.
Ignition ON, wait 5 minutes, then contact the OnStar call center consultant by pressing the blue OnStar button. A call center consultant should answer the call, ask the consultant to verify the vehicle location to confirm the GPS system is functioning. If the OnStar GPS does not function, replace the vehicle communication interface module.
Ignition OFF, perform the coax cable test on the coax cable, refer to Component Testing. The coax cable should pass the test. If the coax cable does not pass the test, replace the coax cable.
If all circuits test normal, replace the radio antenna.

CAUTION

Refer to Test Probe Caution .

Note. Before testing the coax cable, check the cable exterior for being pinched, cut, damaged, or having loose connections at the components, which can cause reception issues. To prevent false reading when testing the center coax terminals, use care not to ground the test probe on the outer housing/shield.

Coax Cable Test

Ignition OFF, disconnect the GPS and cellular phone coax cable at both components.
Test both for less than 5 ohms between both ends of the coax cables center terminals. If greater than the specified range, replace the failed coax cable.
Test for greater than 10k ohms between the coax cable center wire and the outer coax shield. If less than the specified range, replace the coax cable.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Radio Antenna Base Replacement»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for telematics communication interface control module replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The global positioning system (GPS) antenna is connected to the navigation radio by a coaxial cable. The antenna cable also provides a path for DC current for powering the antenna.

Radio ON
Battery voltage between 9-16 volts
The navigation radio tests the GPS antenna every 10 seconds

B2462 02

The navigation radio detects a short to ground in the GPS antenna signal circuit.

B2462 04

The navigation radio detects an open/high resistance in the GPS antenna signal circuit.

The radio uses the last reported position and the vehicle speed signal to calculate the vehicle position.
Route guidance may be inaccurate.
Turn by turn navigation may be inaccurate or inoperative.

The condition responsible for setting the DTC no longer exists.
A history DTC will clear once 50 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

IMPORTANT

The global positioning system (GPS) requires a clear line of sight to the sky to operate properly. In most cases the GPS will not have reception near tall buildings or inside structures.

Ignition OFF, disconnect the GPS antenna coax cable from the navigation radio.
Ignition ON, test for 4.5-5.5 volts between the coax cable connection center conductor at the radio and ground. If not within the specified range, replace the radio.
If all circuits test normal, replace the GPS antenna.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Electronic Navigation Antenna Replacement»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for radio replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The radio antenna is connected to the vehicle communication interface module (VCIM) with a RG-58 coax cable. The VCIM polls the data from the radio antenna once every second.

Ignition in the RUN or ACC position.
System voltage is between 9.5 volts and 15.5 volts.
The above conditions are present for greater than 1 second.

The VCIM does not detect the presence of a radio antenna.
The above conditions are present for greater than 1 second.

The vehicle is unable to connect to the OnStar® Call Center.
The OnStar® status LED turns red.

The VCIM detects the presence of a radio antenna.
A history DTC clears after 50 malfunction-free ignition cycles.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-49903 GM OnStar Antenna Diagnostic Tool Kit

Verify that the radio antenna and radio antenna coupling assembly are not damaged.

If the antenna assembly is damaged, replace the radio antenna.

Note. The vehicle may be equipped with sectioned coax. Test each section and replace only the faulty section, not the entire length of coax.

Ignition OFF, disconnect the GPS and cellular coax cable connector at the VCIM.
Using the EL-49903-3 kit (EL-49903-5 adapter and EL-49903-4 coax cable), connect the EL-49903 GM OnStar antenna diagnostic tool kit to the VCIM.
Clear the DTCs and operate the vehicle within the conditions for running the DTC. Verify DTC B2470 does not set. If the DTC sets, replace the VCIM.
Ignition OFF, disconnect the EL-49903 GM OnStar antenna diagnostic tool kit from the VCIM and perform the coax cable test on the coax cable between the VCIM and the radio antenna. If the coax cable does not pass the test, replace the coax cable.
If all circuits test normal, replace the radio antenna.

CAUTION

Refer to Test Probe Caution

Coax Cable Test

Ignition OFF, disconnect the GPS and cellular phone coax cable at both components.
Test both for less than 5 ohms between both ends of the coax cables center terminals. If greater than the specified range, replace the failed coax cable.
Test for greater than 10k ohms between the coax cable center wire and the outer coax shield. If less than the specified range, replace the coax cable.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Antenna Cable Replacement»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Radio Antenna Base Replacement»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for VCIM replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The internal backlighting of the navigation display screen located in the navigation radio.

Radio ON.
Battery voltage must be between 9-16 volts.

The navigation radio tests the navigation display backlighting every 1 second.
The radio determines there is a malfunction or overheat condition in the navigation display backlighting.

Navigation backlighting may be too bright, dim or blank.

The condition responsible for setting the DTC no longer exists.
A history DTC will clear once 50 consecutive malfunction-free ignition cycles have occurred.

Occasionally it is possible to overheat the navigation display backlighting due to excessive ambient heat inside the vehicle. In this instance it may be necessary to allow time for the display to cool.

Schematic Reference

Connector End View Reference

Navigation System Description and Operation

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition OFF, allow the navigation display to cool if the ambient temperature inside the vehicle is excessive and the radio is hot to the touch. Verify the navigation display is cool and the DTC has cleared and gone to history.
Ignition ON, with a scan tool, clear all DTCs and operate the audio/navigation system within the Conditions for Running the DTC. Verify the DTC does not reset. If the DTC resets, replace the radio.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for Radio replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
10 V Reference		B2476 04
Control Terminal 14	1	1	2
Control Terminal 15	1	1	2
Signal Terminal 11	3	3		B2476 59, B2482 00
Ground		1
1. OnStar® LED Inoperative 2. LED Illuminated At All Times 3. OnStar® Buttons Inoperative

The OnStar® button assembly consists of 3 buttons, Call/Answer, OnStar® Call Center, and OnStar® Emergency. The communication interface module (CIM) supplies the OnStar® button assembly with 10 V via the keypad supply voltage circuit . Each of the buttons, when pressed, completes the circuit across a resistor allowing a specific voltage to be returned to the CIM over the keypad signal circuit. Depending upon the voltage range returned, the CIM is able to identify which button has been activated.

Ignition ON.
Battery voltage must be between 9-16 V.

B2476 04

The CIM detects an open/high resistance on the keypad supply voltage circuit.

B2482 and B2476 59

The CIM detects a valid signal on the keypad signal circuit for longer than 15 seconds. If one of the OnStar® buttons is held or stuck for 15 seconds or greater, the CIM will set this DTC.

The OnStar® status LED turns red.
No calls can be placed.
The CIM will ignore all inputs from the OnStar® button assembly.

The condition responsible for setting the DTC no longer exists.
A history DTC will clear once 50 consecutive malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition OFF, disconnect the harness connector at the A10 inside rearview mirror.
Test for less than 10 ohms between the mirror ground circuit terminal 8 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
Ignition ON, test for less than 1 V between the keypad signal circuit terminal 11 and ground. If greater than the specified range, test the keypad signal circuit for a short to voltage. If the circuit tests normal, replace the CIM.
Ignition OFF, test for 600k-800k ohms between the keypad signal circuit terminal 11 and ground. If less than the specified range, test the keypad signal circuit for a short to ground. If the circuit tests normal, replace the CIM. If greater than the specified range, test the keypad signal circuit for an open/high resistance. If the circuit tests normal, replace the CIM.
Ignition ON, test for 9.5-10.5 V between the keypad supply voltage circuit terminal 12 and ground. If less than the specified range, test the supply voltage circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the CIM. If greater than the specified range, test the supply voltage circuit for a short to voltage. If the circuit tests normal, replace the CIM.
If all circuits test normal, test or replace the button assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Inside Rearview Mirror Replacement»(/buick/enclave/i-2007-2013/remont/mirrors/#mirror-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for CIM replacement, setup, and programming

Note. The following steps must be completed before using the symptom table.

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link.
Review the system operation in order to familiarize yourself with the system functions. Refer to «OnStar Description and Operation»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system__onstar-description-and-operation) .

Inspect for aftermarket devices which could affect the operation of the Radio/Audio System. Refer to «Checking Aftermarket Accessories»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__checking-aftermarket-accessories) .
Inspect for easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

«Bluetooth Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«OnStar Global Positioning System (GPS) Data Not Current or Inaccurate»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«OnStar Microphone Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«OnStar Audio Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«OnStar Button LED Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«OnStar Call Center Remote Function Requests Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«OnStar Button Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Unable to Contact OnStar Call Center»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«OnStar Voice Recognition Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«OnStar Steering Wheel Control Functions Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system__onstar-steering-wheel-control-functions-malfunction)

IMPORTANT

The following steps must be completed before using the symptom tables.

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) , before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link.
Review the «Radio/Audio System Description and Operation»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system__radioaudio-system-description-and-operation) in order to familiarize yourself with the system functions.

Inspect for aftermarket devices which could affect the operation of the Radio/Audio system. Refer to «Checking Aftermarket Accessories»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__checking-aftermarket-accessories) .
Inspect for easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

«Audio/Video Player Adapter - Audio or Video Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Auxiliary Audio Input Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Digital Radio Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Radio Audio Malfunction at Rear Seat Audio (RSA) Control»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Radio Displays CAL or CAL ERR»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Radio Displays LOC, LOCKED, or CODE»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Radio Poor Reception»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Speaker Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Video Entertainment System Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Video Entertainment System Remote Control Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Video Entertainment System Wireless Headphone Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Dual DVD Rear Seat Entertainment Headrest Display Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Dual DVD Rear Seat Entertainment Headrest Display Inoperative - One or More»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Dual DVD Rear Seat Entertainment Headrest Audio Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Dual DVD Rear Seat Entertainment Headrest Video Does Not Synchronize»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Dual DVD Rear Seat Entertainment Headrest Wireless Headphones Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Dual DVD Rear Seat Entertainment Headrest Remote Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)

IMPORTANT

The following steps must be completed before using the symptom tables.

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) , before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link.
Review «Navigation System Description and Operation»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system__navigation-system-description-and-operation) in order to familiarize yourself with the system functions.

Inspect for aftermarket devices which could affect the operation of the navigation system components. Refer to «Checking Aftermarket Accessories»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__checking-aftermarket-accessories) .
Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

«Navigation System - Voice Recognition Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«No Global Positioning System (GPS) Reception»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
Right Auxiliary Audio Signal	1	1	1
Left Auxiliary Audio Signal	2	2	2
Auxiliary Audio Common Ground		1, 2
Auxiliary Video Ground		3
Auxiliary Video High Signal	3	3	3
1. No or distorted right side audio 2. No or distorted left side audio 3. No or distorted video

The audio/video adaptor allows the connection of audio and video signals from an external device such as a camcorder, video game console or MP3 player to the rear seat entertainment system. The middle jack is for left audio (white), the right jack is for right audio (red), and the left jack is for video (yellow). The system requires standard RCA cables to connect your external device to the RCA jacks. The auxiliary audio and video circuits are connected to the radio.

Verify the external audio or video device is operating normally before performing this diagnostic procedure.

Schematic Reference

Connector End View Reference

Video Entertainment System Description and Operation (Non-Headrest DVD Systems) , Video Entertainment System Description and Operation (Dual Headrest DVD Systems)

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

IMPORTANT

Verify the DVD player in the radio is operating normally before performing this diagnostic procedure. If there is any problems with operating the DVD player, refer to Symptoms - Entertainment

Ignition OFF, disconnect the X3 harness connector at the radio.
Ignition ON, test for less then 1 volt between the appropriate signal circuit terminals listed below and ground. Auxiliary audio left signal (+) - terminal 1 Auxiliary audio right signal (+) - terminal 2 Auxiliary audio drain wire (-) - terminal 9 Auxiliary video signal (+) - terminal 8 Auxiliary video drain wire (+) - terminal 16 If greater then specified range, test the circuit for a short to voltage.
Test for infinite resistance between the terminals listed below and ground. Auxiliary audio left signal (+) - terminal 1 Auxiliary audio right signal (+) - terminal 2 Auxiliary audio drain wire (-) - terminal 9 Auxiliary video signal (+) - terminal 8 Auxiliary video drain wire (+) - terminal 16 If less then the specified value, test the circuit for a short to ground.
Test for less then 5 ohm between the terminals on the radio X3 harness connector and the external terminals on the audio/video adaptor listed below: Auxiliary audio left signal (+) - terminal 1 and the inside of the center (white) jack Auxiliary audio right signal (+) - terminal 2 and the inside of the right (red) jack Auxiliary audio drain wire (-) - terminal 9 and the outside of both the center (white), and the right (red) jacks Auxiliary video signal (+) - terminal 8 and the inside of the left (yellow) jack Auxiliary video drain wire (+) - terminal 16 and the outside of the left (yellow) jack If greater then the specified value, test the circuit for an open/high resistance. If the circuit tests normal, replace the adaptor.
If all circuits test normal, replace the radio.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Audio/Video Disc Player Adapter Replacement»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Radio replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provide an overview of each diagnostic category.

Auxiliary Audio Input Jack

The infotainment system has a 3.5mm (1/8 in.) auxiliary audio input jack available on the face of the radio. This input interfaces internally with the radio, no external circuits are involved. When a portable audio playback device is connected to an auxiliary jack, an internal switch detects the connection and the radio will switch to AUX as the audio source.

USB Port

The vehicle may be equipped with a USB port in the instrument panel compartment. This port allows USB connectivity to the infotainment system from portable media players or a USB storage device (memory stick/ flash drive). When a device is connected to the USB port, the system detects the device and switches to USB as the audio source. Once connected, the device can be controlled from the radio controls.

The USB port is connected to the radio via a standard USB cable. Mini type USB connectors are used to connect the cable at the USB port and at the radio or multimedia player interface module. Standard USB male to female connections are typically used for connecting USB cables together where an in-line connection is required. An in-line cable connection is typically found between the console and I/P harness.

Not all portable media player devices are compatible. Memory stick/ flash drive capability is limited to MP3 and WMA file types only. Video transfer from any device is not supported. Refer to the owner's manual for information on USB devices, control, and operation.

Auxiliary Audio Input Jack

When a device is first connected to the 3.5 mm (1/8 in) input jack the infotainment system automatically switches to that device. If an auxiliary device has already been connected, press the AUX or CD/AUX button to select the device.
If the system detects the device, but the audio is not heard or is not clear, attempt to connect the device using a different cable; cables can deteriorate over time or become damaged.
Playback of an audio device that is connected to the 3.5 mm jack can only be controlled using the controls on the device.
The volume control on the device may need to be adjusted to ensure sufficient playback volume through the infotainment system.

USB

When a device is first connected to the USB port, the infotainment system automatically switches to that device. If an auxiliary device has already been connected, press the AUX or CD/AUX button to select the device.
A low battery condition in a portable media player may not allow the device to connect to the system, or can create communication issues with the device. Verify the device battery state of charge and re-charge or replace as needed.
Connect the device directly to the USB port if possible. Only use a cable if it is required to connect the device. The use of extension cables can cause communication issues.
If a cable is required for connection, attempt to connect the device using a different cable; cables can deteriorate over time or become damaged.
Attempt audio playback from multiple USB devices when diagnosing USB concerns. Device compatibility can vary based on vehicle equipment. If the infotainment system is capable of operating any USB type device, the cause of the concern is not with the vehicle system. The inoperative device(s) may be incompatible or contain no recognized media types.
If a 'Device Not Supported' or similar type error message is displayed, this indicates the system has connected to the device but cannot communicate with it properly. This does not indicate an issue with the vehicle system. The device may be incompatible, may require a 'reset', or may require an update to its software/firmware.
If a 'No Supported Data Found' or similar type error message is displayed, this indicates the system has connected to the device and is communicating, but cannot find any compatible files/data. This does not indicate an issue with the vehicle system. Verify the device contains compatible media/file types.
Poor connections or damaged USB cables can cause intermittent or no operation of USB devices. Inspect connectors, terminals, and cables for damage and replace components as necessary. Ensure all USB inline connections and connections at components are fully seated and connector position retainers/locks are secure.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-50334-50 USB Cable and Adapter Kit

Auxiliary Audio Input Jack

Verify no DTCs are present. If any DTCs are present, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-trouble-code-dtc-list)
Ignition ON, radio ON, connect a portable audio playback device to the auxiliary audio input jack on the radio. Verify the infotainment system to switches AUX as the audio source. If the infotainment system does not switch to AUX as the audio source, replace the radio.
Operate the device to begin audio playback, adjusting the volume on the device if necessary. Verify the audio from the device is heard through the vehicle infotainment system. If audio is not heard from the device, attempt to playback audio from another device. If audio cannot be heard from any device connected to the auxiliary audio input jack, replace the radio.

USB Port

Verify no DTCs are present. If any DTCs are present, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-trouble-code-dtc-list)
Inspect the USB port for damage. If damage is noted, replace the USB port.
Ignition ON, radio ON, connect a device to the USB port. Verify the infotainment system to switches USB as the audio source. If the infotainment system does not switch to USB as the audio source, refer to Circuit/System Testing.
Operate the radio controls to play audio from the device. Verify the audio from the device is heard through the vehicle infotainment system. If audio is not heard from the device, attempt to playback audio from another device. If audio cannot be heard from any device connected to the USB port, or the audio heard is not clear, refer to Circuit/System Testing.

USB Port

Ignition OFF, disconnect the USB cable connection at the A11 radio.
Connect the EL-50334-2 Type A female to Mini B male USB Cable to the A11 radio.
Ignition ON, radio ON, connect a USB device to the EL-50334-2 cable. Verify the infotainment system switches to USB as the audio source. If the infotainment system does not switch to USB as the audio source, replace the A11 radio.
Ignition OFF, reconnect the vehicle USB cable to the A11 radio.
Disconnect the USB cable at the USB receptacle.
Connect the EL-50334-4 Type A female to Mini B female adapter to the USB cable.
Ignition ON, radio ON, connect a USB device to the EL-50334-4 adapter. Verify the infotainment system switches to USB as the audio source. If the infotainment system does not switch to USB as the audio source, replace the USB cable assembly.
If all circuits test normal, replace the USB receptacle.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«USB Receptacle Replacement (Traverse)»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system) , «USB Receptacle Replacement (Acadia, Enclave)»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Radio replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provide an overview of each diagnostic category.

The Bluetooth ® antenna is internal to the vehicle communication interface module and is used to send and receive signals from a Bluetooth ® enabled cellular phone.

In order to use hands-free calling, the cellular phone must be paired to the vehicle. Up to five devices can be paired to the vehicle at one time, but only one can be connected at any given time. To pair a phone, the customer must know how to operate the Bluetooth ® functionality of their phone. The pairing process must only be done one time for each phone, unless that phone's information is deleted. For safety reasons, the pairing process is disabled while the vehicle is moving.

The purpose of this diagnostic is to verify the ability of the vehicle communication interface module to pair to a Bluetooth ® device.
Before performing this test, verify compatibility of the cellular phone(s) the customer is attempting to use with the vehicle. Based on the cellular phone's service provider and the manufacturer's implementation of Bluetooth ®, not all phones support all available Bluetooth ® functionality. A vehicle and feature compatibility list will be provided via the GM Bluetooth ® website: http://www.onstar.com/web/Bluetooth/
If the vehicle passes the following tests and a compatible device is being used, the concern may be due to a device malfunction or an incomplete/improper pairing attempt.
A Bluetooth ® test tool or equivalent can also be used to verify the ability of the customers cellular phone(s) to pair with another device.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Set up a Bluetooth ® test tool or equivalent.
Initiate the pairing process provided in the Vehicle Owners Manual.
Perform the discovery/search operation with the test tool. Verify the vehicle appears in the list of available devices. If the vehicle is not in the list of available devices, repeat the discovery/search operation. If the vehicle is still not in the list of available devices, replace the vehicle communication interface module.
Complete the pairing process and verify successful pairing with the test tool. If pairing is not successful, repeat the pairing process. If pairing is still not successful, replace the vehicle communication interface module.

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for vehicle communication interface module replacement, programming and setup

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
B+		1
Left Audio Signal (+)	2	2	2
Left Audio Signal (-)	2	2	2
Right Audio Signal (+)	3	3	3
Right Audio Signal (-)	3	3	3
Digital Radio Antenna Coax	B1259 02	B1259 05	B1259 05
Ground		1
1. No communication with DRR/XM not available 2. No or distorted audio from left side speakers when listening to digital radio 3. No or distorted audio from right side speakers when listening to digital radio

When diagnosing digital radio concerns, the vehicle should be located outside with an unobstructed view of the southern sky to ensure proper reception of the satellite signal. Reception may be limited, intermittent or not possible inside structures or under heavy cover.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-48028 Digital Radio Test Antenna

Verify that the Check XM Receiver message is not displayed on the radio. If a Check XM Receiver message is displayed, replace the DRR.
Tune to a strong AM or FM station and verify each speaker is producing clear and even sound, with no distortion. If any speaker is not producing sound or the sound produced is distorted, refer to «Speaker Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system) .
With the vehicle outside in an area with an unobstructed view of the southern sky, tune to XM. Verify XM reception is clear and the No XM Signal message is not displayed on the radio. If the No XM Signal message is displayed or XM reception is poor, refer to Digital Radio Antenna Circuit Malfunction.
Radio tuned to XM, use the radio balance function to transfer audio between the left and right side of the vehicle. Verify clear and even sound is heard from each side of the vehicle. If either side of the vehicle is not producing sound or the sound produced is distorted, refer to Digital Radio Signal Circuit Malfunction.
Verify that the XM band is receiving all channels (preview mode). If no channels are displayed, advise the customer to refer to the owner's manual for XM contact information in regards to an active account status and/or a refresh request.

Digital Radio Antenna Circuit Malfunction

Ignition OFF, disconnect the digital radio antenna coax from the digital radio receiver (DRR). Connect the EL-48028 digital radio test antenna to the DRR.
Ignition ON, radio tuned to XM, verify XM reception is clear and uninterrupted. If reception is not clear, replace the DRR.
Ignition OFF, reconnect the antenna coax to the DRR, disconnect the digital radio antenna coax from the digital radio antenna.
Ignition ON, test for 4.5-5.5 V between the antenna coax center terminal and the coax outer shield. If not within the specified range, replace the antenna coax.
If all circuits test normal, replace the digital radio antenna.

Digital Radio Output Circuit Malfunction

Ignition OFF, disconnect the X2 harness connector at the radio.
Ignition ON, radio ON and tuned to XM, test for a varying mV AC voltage reading between the following signal circuit terminals listed below and ground. Left audio signal (+) - terminal 1 Right audio signal (+) - terminal 2 Left audio signal (-) - terminal 9 Right audio signal (-) - terminal 10 If AC voltage is not present, test the signal circuit for a short to voltage, short to ground, or an open/high resistance. If the circuit tests normal, replace the DRR.
If all circuits test normal, replace the radio.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Digital Radio Antenna Replacement»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Digital Radio Antenna Cable Replacement»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for DRR and Radio replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
DVD Control Module B+		1
Left Display B+	2	2	2
Right Display B+	3	3	3
Left Audio Signal (+)	4	5	4
Right Audio Signal (+)	6	7	6
Left DVD Video Signal (+)	8	8	8
Right DVD Video Signal (+)	9	9	9
Left Display Video Ground	8	8	8
Right Display Video Ground	9	9	9
Left Display Ground		2	2
Right Display Ground		3	3
DVD Control Module Ground		1
1. DVD Control Module inoperative, both displays inoperative. 2. Left display inoperative. 3. Right display inoperative. 4. Left audio distorted. 5. No sound from left audio. 6. Right audio distorted. 7. No sound from right audio. 8. Left display blank. 9. Right display blank.

The DVD displays are grounded and powered by the DVD control module. When a movie is playing, the video signals are sent from the player, to the DVD control module, and back to the display. This allows the other monitor to source the same video as the player with the disc.

Schematic Reference

Connector End View Reference

Video Entertainment System Description and Operation (Non-Headrest DVD Systems) , Video Entertainment System Description and Operation (Dual Headrest DVD Systems)

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

One Display Inoperative

Ignition OFF, disconnect the X1 harness connector at the appropriate display.
Ignition ON, test for less than 5 ohms between the ground circuit terminal 5 and ground. If greater than the specified range, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the DVD control module.
Ignition ON, test for B+ between the ignition voltage circuit terminal 6 and ground. If less than the specified value, B+ circuit for an open/high resistance. If the circuit tests normal, replace the DVD control module.
Ignition OFF, reconnect the X1 harness connector, and disconnect the X2 harness connector at the display.
Ignition ON, test for 4.5-5.5 V between the terminals listed below and ground: I2C Clock Signal - terminal 5 I2C Data - terminal 6 If less than specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the DVD control module. If greater than specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the DVD control module.
If all circuits test normal, replace the appropriate display.

Both Displays Inoperative

Ignition OFF, disconnect the X1 harness connector at the DVD control module.
Test for less 5 ohms between the ground circuit terminal 3 and ground. If the greater than the specified range, test the ground circuit for an open/high resistance.
Ignition ON, test for B+ between the accessory voltage circuit terminal and ground. If less than the specified value, test the B+ circuit for a short to ground or an open/high resistance.
Ignition OFF, Reconnect the X1 harness connector at the DVD control module
Disconnect the X1 harness connector at the driver seat headrest.
Ignition ON, test for less than 5 ohms between the ground circuit terminal 5 and ground. If greater than the specified range, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the DVD control module.
Ignition ON, test for B+ between the ignition voltage circuit terminal 6 and ground. If less than the specified value, B+ circuit for an open/high resistance. If the circuit tests normal, replace the DVD control module.
Ignition OFF, reconnect the X1 harness connector, and disconnect the X2 harness connector at the display.
Ignition ON, test for 4.5-5.5 V between the terminals listed below and ground: I2C Clock Signal - terminal 5 I2C Data - terminal 6 If less than specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the DVD control module. If greater than specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the DVD control module.
If all circuits test normal, replace the appropriate display.

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Schematic Reference

Connector End View Reference

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

One Display Inoperative (Dual Display)

Turn ON the ignition, press the power button on the suspect display. Verify the suspect DVD display does not power up. If the DVD display powers up but the screen is blank and will not play any DVDs, replace the DVD display.
At the DVD control module, touch a test lamp at the back of the suspect black or red connector between terminal 6 and ground. Verify that a test lamp illuminates between terminal 6 and ground. If the test lamp does not illuminate, replace the DVD control module.
At the DVD control module, touch a test lamp at the back of the suspect black or red connector between terminal 5 and B+. Verify that a test lamp illuminates between terminal 5 and B+. If the test lamp does not illuminate, replace the DVD control module.
Disconnect the suspect black or red connector from the suspect DVD display. At the black or red DVD display connector, Test for B+ at terminal 6. If B+ is not present replace the DVD display harness.
At the black or red DVD display connector, test for less than 1.0 ohm between the ground circuit terminal 5 and ground. If greater than the specified range, replace the DVD display harness. If all circuits test normal replace the suspect DVD display.

Display Inoperative (Single Display) or Both Displays Inoperative (Dual Display)

Turn ON the ignition, press the power button on both suspect displays. Verify the suspect DVD displays do not power up. If the DVD display powers up but the screen is blank and will not play any DVDs, replace the suspect DVD display.
Disconnect the 2 wire connector from the DVD control module. At the 2 wire harness connector, test for less than 1.0 ohm between the ground circuit terminal and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
At the DVD control module 2 wire harness connector, verify that a test lamp illuminates between the B+ circuit terminal and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
Reconnect the 2 wire harness connector at the DVD control module
At the DVD control module, touch a test lamp at the back of the black or red connector between terminal 1 and ground. Verify that a test lamp illuminates between terminal 1 and ground. If the test lamp does not illuminate, replace the DVD control module.
At the DVD control module, touch a test lamp at the back of the suspect black or red connector between terminal 2 and B+. Verify that a test lamp illuminates between terminal 2 and B+. If the test lamp does not illuminate, replace the DVD control module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Refer to Dual DVD Rear Seat Entertainment Headrest Package Installation

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The infrared transmitter is internal to the DVD display and is grounded and powered by the DVD control module. When listening to the headphones, the infrared transmitter sends an infrared signal to the headphones. There are two channels on the headphones, the first channel is dedicated to the driver side video screen, and the other channel is dedicated to the passenger side. The audio that is sent over the DVD audio signal circuits is a varying AC voltage.

Schematic Reference

Connector End View Reference

Video Entertainment System Description and Operation (Non-Headrest DVD Systems) , Video Entertainment System Description and Operation (Dual Headrest DVD Systems)

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Dual DVD Rear Seat Entertainment Audio Malfunction - With FM Antenna

Turn ON the ignition, tune the radio to station 88.3, 88.7, 89.1, 89.5, 89.9, or 90.3MHz. Chose the station that has the least amount of regular audible radio reception.
Headrest DVD displays ON, insert a DVD and operate the DVD player in play mode.
DVD playing, DVD Surround Sound ON, set the DVD Player to the same station as the radio. Verify audio can be heard through the radio. If the DVD audio can be heard review the system operation with the customer.
Verify the DVD player is in play mode.
At the DVD control module, test for AC voltage between terminal 6 and terminal 3 or 4 with a DMM at the back of the black or red connector. If AC voltage is present replace the DVD control module.
Turn the DVD player off and disconnect both connectors from the DVD display that was playing the DVD.
Swap the two connectors on the display and swap the two corresponding connectors at the DVD control module. Verify the DVD audio now operates normally. If the DVD audio now operates normally, replace the DVD display harness. It the DVD audio is still inoperative replace the suspect DVD display.

Dual DVD Rear Seat Entertainment Audio Malfunction - Without FM Antenna

Turn ON the ignition, tune the radio to station 88.3, 88.7, 89.1, 89.5, 89.9, or 90.3MHz. Chose the station that has the least amount of regular audible radio reception.
Press the power button on the headrest DVD displays. Insert a DVD and operate the DVD player in play mode. Verify the DVD audio is distorted on one of the above stations. If the DVD audio can be heard review the system operation with the customer.
Turn the DVD player off and disconnect both connectors from the DVD display that was playing the DVD.
Swap the two connectors on the display and swap the two corresponding connectors at the DVD control module. Verify the DVD audio now operates normally. If the DVD audio now operates normally, replace the DVD display harness. If the DVD audio distortion persists, replace the DVD control module.

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Schematic Reference

Connector End View Reference

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Turn ON the ignition, press the power button on one of the displays and insert a DVD. Operate the DVD player in play mode.
Press the power button on the other display. Press the source button to view the DVD video playing on the adjacent display. Verify that the video displays do not synchronize. Test or repair the suspect video in/out signal circuit for a short to B+, short to ground or open circuit. If all circuits test normal replace the DVD control module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Refer to Dual DVD Rear Seat Entertainment Headrest Package Installation

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Schematic Reference

Connector End View Reference

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Note. Test or replace the headphone batteries before performing Circuit/System Verification.

Verify there are no obstructions that may block the infra-red port located above the video display screen.
Radio ON, DVD playing, verify all of the headphones are working properly and the power indicator illuminates. If all of the headphones are inoperative, or the sound is distorted, refer to Circuit/System Testing. If only one of the headphones is not producing sound on either channel, or the sound is distorted, replace the appropriate set of headphones.
Using a known good pair of wired headphones, plug them into both of the headphone jacks on the front of each DVD Monitor. If there is audio emitted from the wired headphones, and not the wireless headphones, replace the appropriate display.

Note. Select both channels by switching the channel selector located on the side of the headphones and verify the volume is turned up. Also verify that the headphones are not in mute mode. Press the Sound Around ON/OFF button on the remote to change audio muting status.

Ignition OFF, disconnect the appropriate seat headrest X2 connector at the monitor.
Ignition ON, DVD playing, test for 15-40 mV A/C between the terminals on the monitor listed below and ground. Right Audio Signal - terminal 3 Left Audio Signal - terminal 4 If the not within the specified range, replace the appropriate DVD display.
Ignition OFF, reconnect the harness connector at the monitor.
Disconnect the appropriate seat headrest X2 connector at the DVD control module.
Ignition ON, DVD playing, test for 15-40 mV A/C between the terminals on the monitor listed below and ground. Right Audio Signal - terminal 3 Left Audio Signal - terminal 4 If the not within the specified range, replace the wiring harness.
If all circuits test normal, replace the DVD control module.

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The infrared transmitter is internal to the DVD display and is grounded and powered by the DVD control module. When listening to the remote control, the remote sends an infrared signal to the infrared receiver. No external circuits are involved.

Schematic Reference

Connector End View Reference

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Note. Test or replace the remote batteries before performing Circuit/System Verification.

Verify there are no obstructions that may block the infra-red port located above the video display screen.
DVD playing, press multiple buttons on the remote control and verify the remote operatives properly at both monitors. If remote fails to operate either DVD monitor, replace the remote. If remote operates only one DVD monitor, replace the inoperative monitor.

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The vehicle communication interface module (VCIM) receives information from a specific radio antenna located on the outside of the vehicle. The radio antenna is connected to the vehicle communication interface module via a shielded coaxial cable. The antenna cable also provides a path for DC current for powering the antenna.

The GPS signal title on the scan tool will display a Yes or No dependant upon whether or not the module sees an increment of the seconds transmitted by GPS signals to the vehicle communication interface module. Upon entering this screen, the GPS signal title will automatically display Yes, regardless of the presence of time increment, for at least 2 seconds, while the algorithm in the scan tool determines the status of the clock. If increment is found, Yes is continually displayed. If the clock remains static, No is displayed. The scan tool looks for increment every second, regardless of current display.
Inaccurate or aged GPS position concerns which are no longer present may have been due to the temporary loss of GPS signal reception by the vehicle. Conditions such as driving through tunnels or parking structures while making an OnStar® keypress will restrict the radio antenna from a clear view of the satellites in the sky and may have caused this temporary data loss.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
«OnStar Description and Operation»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system__onstar-description-and-operation)

Scan Tool Reference

Control Module References for scan tool information

IMPORTANT

It is important to have the vehicle in an open outside area where a cellular call can be successfully placed and GPS data can be received from the satellites. It is also necessary to inform the OnStar® Call Center advisor that this call is for vehicle diagnostic purposes.

Ignition ON, observe the GPS signal status indicator for at least 10 seconds with a scan tool. The indicator should display Yes. If the indicator does not display Yes, refer to Circuit/System Testing.
Call and verify the OnStar advisor has received the GPS data. If the advisor did not receive the GPS data and the call was a "fail to voice", contact the GM Technical Assistance Center. If the advisor did not receive the GPS data and the call was not a "fail to voice", refer to Circuit/System Testing.
Verify with the OnStar Call Center advisor that your actual position is within a reasonable distance from the actual location of the vehicle. If your actual position is not within a reasonable distance from the actual location of the vehicle, replace the vehicle communication interface module.

Ignition OFF, disconnect the GPS and cell coax cable connector at the vehicle communication interface module.
Using the EL-49903-3 kit (EL-49903-5 adapter and EL-49903-4 coax cable), connect the EL-49903 GM OnStar antenna diagnostic tool kit to the vehicle communication interface module, place the test antenna on the roof of the vehicle.
Ignition ON, wait 5 minutes, then contact the OnStar call center consultant by pressing the blue OnStar button. A call center consultant should answer the call, ask the consultant to verify the vehicle location to confirm the GPS system is functioning. If the OnStar GPS does not function, replace the vehicle communication interface module.
Reconnect the coax cable to the vehicle communication interface module. Disconnect the coax cable from the radio antenna.
Test for 4.5-5.5 V between the coax cable center conductor and the outer shield. If not within the specified range, replace the coax cable.
If all circuits test normal, replace the radio antenna.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Antenna Cable Replacement»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Radio Antenna Base Replacement»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for vehicle communication interface module replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
Cellular Microphone Signal	B2455 02	B2455 04
Cellular Microphone Low Reference		B2455 04	1
1. OnStar Microphone Inoperative - Caller Cannot Be Heard

The telematics communication interface control module provides the cellular phone microphone with a supplied voltage on the cellular phone microphone signal circuit. When the cellular phone microphone is in use, voice data from the user is sent back to the telematics communication interface control module on the signal circuit. The telematics communication interface control module provides a ground for the microphone via the low reference wire.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition OFF, disconnect the harness connector at the cellular phone microphone.
Ignition ON, test for 9.5-10.5 V between the signal circuit terminal B and ground. If less than the specified range, test the circuit for a short to ground, shorted together, or an open/high resistance. If the circuit tests normal, replace the vehicle communication interface control module. If greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the vehicle communication interface control module.
Test for 9.5-10.5 V between the signal circuit terminal B and the low reference circuit terminal A. If less than the specified range, test the low reference circuit for a short to ground, shorted together, or an open/high resistance. If the circuit tests normal, replace the vehicle communication interface control module. If greater than the specified range, test the low reference circuit for a short to voltage. If the circuit tests normal, replace the vehicle communication interface control module.
If all circuit test normal, replace the cellular phone microphone.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Mobile Telephone Microphone Replacement»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for telematics communication interface control module replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The vehicle navigation radio and OnStar® system both utilize the cellular microphone to receive voice commands. The navigation radio receives an audio voice signal from the communication interface module (CIM).

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, verify the OnStar® voice recognition is operating normally.

If the OnStar® voice recognition is inoperative, refer to «OnStar Microphone Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system) .

Ignition OFF, disconnect the X2 harness connector at the CIM.
Ignition ON, test for 8.5-9.5 volts between the mono out signal circuit terminal 1 and ground. If less than 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 specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
Ignition OFF, test for less than 10 ohms between the mono out low reference circuit terminal 2 and ground. If greater than the specified range, test the low reference circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the radio.
Ignition ON, test for 8.5-9.5 volts between the mono out signal circuit terminal 1 and the drain wire circuit terminal 8. If less than specified range, test the drain wire circuit for a short to voltage or an open/high resistance.
Ignition OFF, disconnect the X2 harness connector at the radio.
Verify that a test lamp does not illuminate between B+ and the mono out low reference circuit terminal 15. If the test lamp illuminates, test the low reference circuit for a short to ground.
If all circuits test normal, replace the CIM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for Radio or CIM replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provide an overview of each diagnostic category.

The vehicle navigation radio and OnStar® system both utilize the cellular microphone to receive voice commands. The navigation radio receives an audio voice signal from the vehicle communication interface module (VCIM).

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, verify the OnStar® voice recognition is operating normally.

If the OnStar® voice recognition is inoperative, refer to «OnStar Microphone Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system) .

Ignition OFF, disconnect the X3 harness connector at the VCIM.
Ignition ON, test for 8.5-9.5 volts between the navigation voice signal circuit terminal 2 and ground. If less than 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 specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
Ignition OFF, test for less than 10 ohms between the navigation voice low reference circuit terminal 4 and ground. If greater than the specified range, test the low reference circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the radio.
Ignition ON, test for 8.5-9.5 volts between the navigation voice signal circuit terminal 2 and the drain wire circuit terminal 5. If less than specified range, test the drain wire circuit for a short to voltage or an open/high resistance.
Ignition OFF, disconnect the X1 harness connector at the radio.
Verify that a test lamp does not illuminate between B+ and the navigation voice low reference circuit terminal 5. If the test lamp illuminates, test the low reference circuit for a short to ground.
If all circuits test normal, replace the VCIM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for Radio or VCIM replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
Audio Signal	1	1	1
Audio Common Signal		1
1. No (or Noisy) OnStar® Audio

When an OnStar® keypress is made, a serial data message is sent to the audio system to mute all radio functions and output OnStar® originated audio. After the audio system is muted, the vehicle communication interface control module transmits signals to the audio system on the audio signal and audio common circuits.

Schematic Reference

«OnStar Schematics»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Radio/Navigation System Schematics»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Tune radio to a known good station and verify the audio is heard clearly through all speaker channels. If audio is not heard clearly, refer to «Speaker Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system) .
Ignition ON, radio ON, set volume to comfortable level and press OnStar® Call Center button. Verify Connecting to OnStar® message is heard clearly through the audio system. If OnStar® message is noisy or distorted, refer to Circuit/System Testing.

Ignition OFF, disconnect the X1 harness connector at the radio.
Disconnect the X2 harness connector at the vehicle communication interface control module.
Ignition ON, test for less than 1 V between the vehicle communication interface control module cellular telephone voice signal circuit terminal 1 X2 and ground. If not the specified value, test the cellular telephone voice signal circuit for a short to voltage.
Test for less than 1 V between the vehicle communication interface control module cellular telephone voice low reference circuit terminal 2 X2 and ground. If not the specified value, test the cellular telephone voice low reference circuit for a short to voltage.
Ignition OFF, test for infinite resistance between the vehicle communication interface control module cellular telephone voice signal circuit terminal 1 X2 and ground. If not the specified value, test the cellular telephone voice signal circuit for a short to ground.
Test for infinite resistance between the vehicle communication interface control module cellular telephone voice low reference circuit terminal 2 X2 and ground. If not the specified value, test the cellular telephone voice low reference circuit for a short to ground.
Test for less than 2 ohms between the vehicle communication interface control module cellular telephone voice signal circuit terminal 1 X2 and the radio terminal 7 X2. If not the specified value, test the cellular telephone voice signal circuit for a open/high resistance.
Test for less than 2 ohms between the vehicle communication interface control module cellular telephone voice low reference circuit terminal 2 X2 and the radio terminal 15 X2. If not the specified value, test the cellular telephone voice low reference circuit for a open/high resistance.
If all circuits test normal, replace the vehicle communication interface control module.
If all circuits test normal, replace the radio.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for radio or vehicle communication interface control module replacement, setup, and programming.

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The global positioning system (GPS) antenna is connected to the navigation radio by a shielded coaxial cable. The antenna cable also provides a path for DC current for powering the GPS antenna.

Schematic Reference

Connector End View Reference

Navigation System Description and Operation

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Note. The global positioning system (GPS) requires a clear line of sight to the sky to operate properly. It may take up to 15 minutes for the Nav Radio to acquire a GPS signal. In most cases the GPS will not have reception near tall buildings or inside structures.

Ignition OFF, disconnect the GPS antenna coax cable from the navigation radio.
Ignition ON, test for 4.5-5.5 V between the coax cable center conductor terminal at the radio and ground. If not within the specified range, replace the radio.
If all circuits test normal, replace the GPS antenna.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Electronic Navigation Antenna Replacement»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Radio replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
B+ Supply Voltage	B2476 00	B2476 00	B2476 00
Control Terminal 14	1	1	2
Control Terminal 15	1	1	2
Signal Terminal 11	3	3
Inside Rearview Mirror Ground		1
1. OnStar® LED Inoperative 2. LED Illuminated At All Times 3. OnStar® Buttons Inoperative

The OnStar® status LEDs are located with the OnStar buttons. The green LED is illuminated when the system is ON and operating normally. When the green LED is green and flashing, it is an indication that a call is in progress. When the red LED is illuminated, a system malfunction is present. In the event there is a system malfunction and the OnStar® system is still able to make a call, the LED will flash red during the call. The OnStar® LEDs are controlled by the communication interface module (CIM) via the keypad green LED signal circuit and the keypad red LED signal circuit.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, command the Green LED ON and OFF with a scan tool while observing the green LED on the inside rearview mirror. The green LED should turn ON and OFF when commanded.
Command the red LED ON and OFF with a scan tool while observing the red LED on the inside rearview mirror. The red LED should turn ON and OFF when commanded.

Ignition OFF, disconnect the harness connector at the inside rearview mirror.
Doors closed, courtesy lamps OFF, test for less than 10 ohms between the ground circuit terminal 8 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
Ignition ON, command the green LED OFF with a scan tool. Test for less than 1 V between the control circuit terminal 14 and ground. If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the CIM.
Command the green LED ON with a scan tool. Test for greater than 9 V between the control circuit terminal 14 and ground. If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the CIM.
Command the red LED OFF with a scan tool. Test for less than 1 V between the control circuit terminal 15 and ground. If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the CIM.
Command the red LED ON with a scan tool. Test for greater than 9 V between the control circuit terminal 15 and ground. If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the CIM.
If all circuits test normal, replace the inside rearview mirror.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Inside Rearview Mirror Replacement»(/buick/enclave/i-2007-2013/remont/mirrors/#mirror-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for CIM replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The communication interface module (CIM) has the capability of commanding the horn, initiating door lock/unlock, or operating the exterior lamps using the serial data circuits. These functions are commanded by the OnStar® Call Center per a customer request.

The customer concern may have been due to a lack of cellular service in a given area. A failure in the National Cellular Network infrastructure that has since been corrected.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

IMPORTANT

This procedure is not used in Brazil.

IMPORTANT

It is necessary to inform the OnStar® Call Center advisor that this call is for vehicle diagnostic purposes. It is necessary to have the vehicle in an open outside area where a cellular call can be successfully placed and GPS data can be received from satellites.

Verify that the horn, lights, and the doors locks on the vehicle operate properly. If the applicable system does not operate properly, refer to «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) .
Contact the OnStar® Call Center by pressing the blue OnStar® button. Verify with the OnStar® advisor that all of the remote functions (door locks, lights, or horn) work. If unable to connect with the OnStar® call center, refer to «Unable to Contact OnStar Call Center»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system) . If the remote functions do not operate when requested, replace the CIM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for CIM replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
B+ Supply Voltage	B2476 00	B2476 00	B2476 00
Control Terminal 14	1	1	2
Control Terminal 15	1	1	2
Signal Terminal 11	3	3		B2482 00
Inside Rearview Mirror Ground		1
1. OnStar® LED Inoperative 2. LED Illuminated At All Times 3. OnStar® Buttons Inoperative

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Note. Contact the OnStar® Call Center first before pressing the emergency button in order to notify them of the test.

Ignition ON, press the OnStar® Call buttons one at the time. Verify that all of the OnStar® buttons operate normally.

If some OnStar® buttons are inoperative but not all, replace the inside rearview mirror.
If none of the OnStar® buttons operate, refer to circuit/system testing.

Ignition OFF, disconnect the harness connector at the inside rearview mirror.
Test for less than 10 ohms between the mirror ground circuit terminal 8 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
Ignition ON, test for less than 1 V between the keypad signal circuit terminal 11 and ground. If greater than the specified range, test the keypad signal circuit for a short to voltage. If the circuit tests normal, replace the CIM.
Ignition OFF, test for 600k-800k ohms between the signal circuit terminal 11 and ground. If less than the specified range, test the keypad signal circuit for a short to ground. If the circuit tests normal, replace the CIM. If greater than the specified range, test the keypad signal circuit for an open/high resistance. If the circuit tests normal, replace the CIM.
Ignition ON, test for 9.5-10.5 V between the keypad supply voltage circuit terminal 12 and ground. If less than the specified range, test the supply voltage circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the CIM. If greater than the specified range, test the supply voltage circuit for a short to voltage. If the circuit tests normal, replace the CIM.
If all circuits test normal, test or replace the button assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Inside Rearview Mirror Replacement»(/buick/enclave/i-2007-2013/remont/mirrors/#mirror-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for CIM replacement, setup, and programming

Note. This procedure is not used in Brazil.

Some vehicles equipped with the OnStar® system have the capability of accessing voice mailboxes and other automated phone systems by means of the steering wheel controls, while the OnStar® Personal Calling (OPC) feature is in use. If the "Talk" or "Mute" button (depending upon the vehicle) on the steering wheel controls is depressed during an OPC call, the communication interface module (CIM) receives the message on the serial data bus from either the radio or body control module (BCM). This message is interpreted as a request to turn any spoken numbers into dual tone multi-frequency (DTMF) tones to be delivered over the airwaves to the phone system the user is communicating with. Complete instructions for operation of these features can be found in the information provided to the customer with the OnStar® system.

The steering wheel controls are a resistor network that consist of multiple momentary contact switches and a series of resistors. The switches and resistor network are arranged so that each switch has a different resistance value. When a switch is pressed, a voltage drop occurs in the resistor network, which produces a specific voltage value unique to the switch selected, to be interpreted by either the radio or BCM. In the event the OnStar® steering wheel control functions are inoperative, technicians should refer to Steering Wheel Controls Malfunction , to begin diagnosis of the steering wheel control concern.

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The rear seat audio (RSA) allows rear seat passengers to listen to and control any of the music sources: radio, CDs, DVDs, or other auxiliary sources. The rear seat passengers can only control the music sources the front seat passengers are not listening to. The sourced audio can be heard through wired headphones plugged into the jacks on the RSA. The RSA receives audio signals from the radio rear audio output circuits.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Radio ON, RSA OFF, verify clear audio is heard from all speakers. If audio is inoperative from one or more speakers, refer to «Speaker Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system) .
Connect a known good pair of wired headphones into both of the headphone jacks on the RSA controller.
Radio ON, RSA ON, cycle through several sources and listen for audio. Verify audio is heard through the headphones. If no audio is heard through the headphones, replace the RSA controller.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for Rear Audio/HVAC module replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Verify the CAL or CAL ERROR is not displayed on radio.

If the radio displays CAL or CAL ERROR, reprogram the radio. If the radio still displays CAL or CAL ERR after performing the reprogramming procedure, replace the radio.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for Radio replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Theft Lock is activated when the VIN as received over the data communication circuit and the VIN as stored in the module memory do not match. This also occurs when no VIN is received over the data communication circuit. The only circuit required is the communication line.

This symptom may be an indication that an incorrect radio is installed in the vehicle, or that the radio was replaced without reprogramming with the new information.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Verify LOC, LOCKED, or CODE is not displayed on radio.

If the radio displays LOC, LOCKED, or CODE, reprogram the radio. If the radio still displays LOC, LOCKED, or CODE after performing the reprogramming procedure, replace the radio.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for Radio replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
PAL B+		1
Left Audio Signal (+)	2	3	2
Left Audio Signal (-)	2	3	2
Right Audio Signal (+)	4	5	4
Right Audio Signal (-)	4	5	4
PAL Ground		1
1. PAL module inoperative. No Communication with PAL or DRR, XM can not be selected from radio. BCM DTC U2172, Radio DTC U0194, LED on PAL does not illuminate. 2. No sound from left speakers when PAL or XM™ is sourced on radio. 3. No sound from left speakers when only PAL is sourced on radio. 4. No sound from right speakers when PAL or XM™ is sourced on radio. 5. No sound from right speakers when only PAL is sourced on radio.

The Apple iPod® is connected to the personal audio link (PAL) through a dedicated interface cable. The cable allows the iPod the ability to share serial data communication, audio signals, power and ground with the vehicle. The T-harness used to connect the PAL module shares the same power and grounds as the radio. The audio signal circuits are shared with the Digital Radio Receiver audio circuits. The PAL module receives Data communication by connecting inline with the DRR.

After PAL is installed, it is only possible to communicate with the DRR when the radio is ON and XM band selected.
If radio is OFF, or tuned to any other band a NO COMM message for DRR is displayed on Tech2 (Vehicle DTC Check).
PAL module maintains a persistent B1000 code that cannot be cleared, and does not affect operation.
If PAL module loses power or ground, BCM and Radio set DTCs for loss of communication with DRR.
The iPod® interface connector is susceptible to vibration and movement damage. It is recommended that excessive movement of the iPod® and cable be avoided while driving.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Note. Verify that the iPod® is in good working order and visually inspect the iPod® connector cavity for any signs of damage before performing this diagnostic. Verify the most up to date software has been downloaded from http://www.apple.com/support/ipod/ to the iPod® before performing this diagnostic.

Tune to a strong AM or FM station and verify each speaker is producing clear and even sound, with no distortion. If any speaker is not producing sound or the sound produced is distorted, refer to «Symptoms - Entertainment»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system__symptoms-entertainment) .
Ignition ON, Observe the PAL red LED lamp. Verify the red LED lamp is illuminated. If the PAL red LED is not illuminated, go to Circuit/System Testing.
Set the radio to the iPod® interface menu and attempt to operate audio from the iPod®.
Inspect the interface harness at the connection to the iPod® and verify that audio quality from the iPod® is not changed when the harness is bent in multiple directions. If the audio changes quality or drops out, inspect the iPod® connector cavity or interface cable for damage. If no damage found, replace the iPod® interface cable.

Ignition OFF, disconnect the harness connector at the PAL module.
Test for less than 5 ohms between terminal 9 and ground. If greater than specified value, test the ground circuit for an open/high resistance.
Ignition ON, verify that a test lamp illuminates between terminal 16 and ground. If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.
Ignition OFF, reconnect the harness connector at the PAL module.
Ignition ON, set the radio to the iPod® interface menu and attempt to operate audio from the iPod®. If the iPod® fails to communicate with the radio, replace the interface cable.
Near the BCM connector, verify the serial data circuit from PAL is properly spliced to the serial data circuit . If the serial data circuit is not connected, reconnect the circuit.
Ignition OFF, disconnect the PAL module and the X1 radio harness connector.
Test for less than 1 ohms between terminal 9 at the X1 radio harness connector and terminal 5 at the X1 PAL module harness connector. If greater than specified value, replace the T-harness.
If all systems test normal, replace the PAL module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

For PAL replacement, refer to Ipod® interface installation instructions.

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Entertainment remote Enable Signal	1	1
1. No or poor AM reception, amplifier inoperative (if equipped)

AM and FM radio reception is dependent on the following components

Radio antenna
Coax cable between the radio antenna and the radio
Radio

The multi-band antenna is located on the roof of the vehicle. A switched B+ output from the radio entertainment remote enable circuit is used to power the AM/FM portion of this antenna. The antenna enable circuit is also used to control the power state of the amplifier (if equipped) and the rear seat entertainment video display (if equipped).

Poor AM and FM radio reception is dependent on multiple influences, some of which may not be vehicle related. Areas which have high RF traffic or block the signal path may cause a degradation in radio reception. Radio reception may also be influenced by items within the vehicle, but not part of the radio system. Such examples are aftermarket electrical accessories or other items which may generated noise in the vehicle electrical system.

AM reception is highly dependent on the antenna receiving battery voltage from the radio. The antenna has a built in antenna amplifier that boosts both AM and FM reception. If the antenna does not receive battery voltage, the radio will still receive FM stations but AM stations will not be received.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Inspect the antenna for proper mounting or physical damage. If damage is found, repair or replace as necessary
Radio ON, tune to several known strong FM, AM, and XM (if equipped) stations, and play a known good CD. Verify clear sound from all sources. If audio quality is poor from all sources, refer to «Speaker Malfunction»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system) .

Ignition OFF, disconnect the harness connector at the antenna.
Radio ON, verify that a test lamp illuminates between the signal circuit terminal 1 and ground. If test lamp does not illuminate, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
Ignition OFF, disconnect the radio antenna coax cable from the radio and the radio antenna.
Test for infinite resistance between the antenna coax center terminal and ground. If less than the specified value, replace the antenna coax.
Test for less than 10 ohms on the antenna coax center terminal from end to end. If greater than the specified range, replace the antenna coax.
Test for less than 10 ohms on the antenna coax outer shield from end to end. If greater than the specified range, replace the antenna coax.
Test for infinite resistance between the coax center terminal and the outer shield. If less than the specified value, replace the antenna coax.
If all circuits test normal, replace the radio antenna. If reception is still poor, replace the radio.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Radio Antenna Base Replacement»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Antenna Cable Replacement»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Radio replacement, setup, and programming

Component	Repair Instruction
Center I/P Speaker	Refer to Radio Front Speaker Replacement
Front Door Speaker	Refer to Radio Front Side Door Speaker Replacement
Front Pillar Speaker (Tweeter Speaker)	Refer to Front Upper Speaker Replacement
Rear Compartment Speaker	Refer to Radio Rear Speaker Replacement
Rear Door Speaker	Refer to Radio Rear Side Door Speaker Replacement
Subwoofer Speaker	Refer to Radio Front Floor Console Speaker Replacement

Speaker Replacement Reference

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
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

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 6.5 V 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 1 V AC and less, where constant music may measure 3 V 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 .

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. The EL-50334-6 Audio System Diagnostic CD contains audio tracks that can be used to duplicate and isolate such concerns. Tracks 11 and 12 contain audio sweep tones for testing for speaker and grill rattles. 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.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

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.

Speaker Circuit Malfunction- without Amplifier without UK6

Ignition OFF, disconnect the harness connector at the appropriate speaker.
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.
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.
If all circuits test normal, replace the speaker.

Speaker Circuit Malfunction- without Amplifier with UK6

Ignition OFF, disconnect the X2 harness connector at the Auxiliary Radio/HVAC Control.
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.
Ignition OFF, reconnect the X2 harness connector at the Auxiliary Radio/HVAC Control. Disconnect the harness connector at the appropriate speaker.
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.
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.
If all circuits test normal, replace the speaker.

Amplifier Circuit Malfunction

Ignition OFF, disconnect the X1 harness connector at the audio amplifier.
Ignition OFF, test for less than 10 ohms 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.
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.
Ignition OFF, disconnect the X3 harness connector at the audio amplifier.
Ignition ON, 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.
Mute OFF, test for less than 1.0 V between the appropriate mute signal circuit terminal listed below and ground. terminal 4 (UQG) terminal 11 (UQA or UQS) If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
If all circuits test normal, replace the audio amplifier.

Speaker Circuit Malfunction - with Amplifier UQG without UK6

Ignition OFF, disconnect the X3 harness connector at the audio amplifier.
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.
Ignition OFF, disconnect the X1 and X2 harness connectors at the amplifier.
Ignition ON, test for less than 1 V 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.
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.
Reconnect all harness connectors at the amplifier. Disconnect the harness connector at the appropriate speaker.
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.
If all circuits test normal, replace the speaker.

Speaker Circuit Malfunction - with Amplifier UQA/UQS without UK6

Ignition OFF, disconnect the X3 harness connector at the audio amplifier.
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.
Ignition OFF, disconnect the X1 and X2 harness connectors at the amplifier.
Ignition ON, test for less than 1 V 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.
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.
Reconnect all harness connectors at the amplifier. Disconnect the harness connector at the appropriate speaker.
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.
If all circuits test normal, replace the speaker.

Speaker Circuit Malfunction - with Amplifier UQG with UK6

Ignition OFF, disconnect the X2 harness connector at the Auxiliary Radio/HVAC Control.
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.
Ignition OFF, reconnect the X2 harness connector at the Auxiliary Radio/HVAC Control. Disconnect the X3 harness connector at the audio amplifier.
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.
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.
Ignition OFF, disconnect the X1 and X2 harness connectors at the amplifier.
Ignition ON, test for less than 1 V 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.
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.
Reconnect all harness connectors at the amplifier. Disconnect the harness connector at the appropriate speaker.
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.
If all circuits test normal, replace the speaker.

Speaker Circuit Malfunction - with Amplifier UQA/UQS with UK6

Ignition OFF, disconnect the X2 harness connector at the Auxiliary Radio/HVAC Control.
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.
Ignition OFF, reconnect the X2 harness connector at the Auxiliary Radio/HVAC Control. Disconnect the X3 harness connector at the audio amplifier.
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.
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.
Ignition OFF, disconnect the X1 and X2 harness connectors at the amplifier.
Ignition ON, test for less than 1 V 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.
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.
Reconnect all harness connectors at the amplifier. Disconnect the harness connector at the appropriate speaker.
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.
If all circuits test normal, replace the speaker.

Perform the Diagnostic Repair Verification after completing the repair.

«Speaker Replacement Reference»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system__speaker-replacement-reference)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for audio amplifier, radio or auxiliary radio/HVAC control replacement, programming and setup

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The vehicle communication interface module (VCIM) is a cellular device that allows the user to communicate data and voice signals over the national cellular network. When an OnStar keypress is made, the VCIM activates and connects the system to the cellular carriers communication system by interacting with the national cellular infrastructure. The module sends and receives all cellular communications over the cellular phone and navigation antenna and cellular antenna coax.

The customer concern may have been due to a lack of cellular service in a given area. A failure in the National Cellular Network infrastructure at the time of the customers failed connection that has since been repaired may also have been the cause.
If an OnStar® emergency call is able to successfully connect the vehicle to the OnStar® Call Center when an OnStar® Call Center button press is not, there may be a failure in the ability of the OnStar® system in the vehicle to be recognized by the local cellular carrier.
If the prompt "OnStar® request ended" is heard, without pressing the white dot button at the end of the OnStar® keypress, the OnStar® system at one time has made a successful cellular connection, but was unable to complete the call.
It is important to have the vehicle in an open outside area where a cellular call can be successfully placed and GPS data can be received from satellites.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-49903 GM OnStar Antenna Diagnostic Tool Kit

If the unit does not connect to the OnStar Call Center, use a scan tool to obtain and record the following information: Electronic Serial Number (ESN), Station Identifier (STID), GM 8-digit part number, Mobile Identification Number (MIN), Mobile Dialed Number (MDN), Transceiver ID (Trans ID) and call GM TAC to confirm a valid subscription.

Note. The vehicle may be equipped with sectioned coax. Test each section and replace only the faulty section, not the entire length of coax.

Ignition OFF, disconnect the GPS and cellular coax cable connector at the VCIM.
Using the EL-49903-3 kit (EL-49903-5 adapter and EL-49903-4 coax cable), connect the EL-49903 GM OnStar antenna diagnostic tool kit to the VCIM.
Ignition ON, wait 5 minutes, and then contact the OnStar call center consultant by pressing the blue OnStar button. A call center consultant should answer the call. If the unit does not connect to the OnStar Call Center, replace the VCIM.
Ignition OFF, disconnect the EL-49903 GM OnStar antenna diagnostic tool kit EL-49903 from the VCIM and perform the coax cable test on the coax cable between the VCIM and the radio antenna. If the coax cable does not pass the test, replace the coax cable.
If all circuits test normal, replace the radio antenna.

CAUTION

Refer to Test Probe Caution .

Coax Cable Test

Ignition OFF, disconnect the GPS and cellular phone coax cable at both components.
Test both for less than 5 ohms between both ends of the coax cables center terminals. If greater than the specified range, replace the failed coax cable.
Test for greater than 10k ohms between the coax cable center wire and the outer coax shield. If less than the specified range, replace the coax cable.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Antenna Cable Replacement»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Radio Antenna Base Replacement»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for VCIM replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provide an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
DVD Display B+	1	1	1
Radio ON Signal	1	1	1
Video Display Brightness Signal	B1289 02, *	B1289 04, *	B1289 01, *
Video Display Mode Control	B1288 02	B1288 04	B1288 01
Video High Signal	2	2	1
Video Low Signal	1	2	3
DVD Display Ground		1
1. Video Entertainment System Inoperative 2. Backlight only - NO image shown 3. Serious damage to radio can occur * Video Brightness can not be adjusted

The rear seat entertainment (RSE) system utilizes the vehicle radio to play DVD movies and transmit video signals to the rear digital video disc (DVD) display. When the radio is turned ON, the DVD display receives a voltage signal from the radio via the entertainment remote enable signal circuit indicating the system status. The video high and low signal circuits are used to transmit the DVD images to the rear DVD display. The video high (+) voltage will vary as the brightness and the speed of the image varies.

A known good DVD disk is any original DVD, NOT a copy. An original DVD will give you the best results whereas a copied DVD can alter the voltage readings.

Schematic Reference

Connector End View Reference

Video Entertainment System Description and Operation (Non-Headrest DVD Systems) , Video Entertainment System Description and Operation (Dual Headrest DVD Systems)

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, vehicle in Park. Operate the DVD entertainment system using several known good DVD disks.

If the radio does not display the DVD, replace the radio.

2. RSE ON, observe the rear DVD screen. Verify the rear video display operates normally.

If the rear video display does not operate normally, refer to circuit testing .

Ignition OFF, disconnect the harness connector at the appropriate DVD display.
Test for less than 5.0 ohms between the ground circuit terminal 6 and ground. If greater than specified range, test the ground circuit for an open/high resistance.
Ignition ON, DVD playing, test for B+ between the entertainment remote enable B+ circuit terminal 8 and ground. If less than specified range, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
Test for B+ between the battery positive voltage circuit terminal 7 and ground. If less than specified range, test the voltage supply circuit for a short to ground or an open/high resistance.
Test for 1-8 V between the video bright control circuit terminal 9, and ground. If greater then specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the radio. If less then specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
Test for 40 mV -3.0 V between the video mode signal circuit terminal 10, and ground. If greater then specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio. If less then specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
Ignition OFF, disconnect the X3 harness connector at the radio. Test for infinite resistance between the circuits listed below and ground: DVD video signal (+) terminal 1 DVD video signal (-) terminal 2 If not the specified value, test the signal circuit for a short to ground.
Test for less than 5 ohms between the DVD display terminal 1 and the radio X3 harness connector terminal 7. If greater than specified range, test the DVD video signal (+) circuit for an open/high resistance.
Test for less than 5 ohms between the DVD display terminal 2 and the radio X3 harness connector terminal 15. If greater than specified range, test the DVD video signal (-) circuit for an open/high resistance.
If all circuits test normal, replace the DVD display.
Ignition ON, DVD playing, verify the DVD display operates normally. If the DVD display does not operate normally, replace the radio.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Video Display Replacement (U42/C3U)»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system) , «Video Display Replacement (U42)»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Radio replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provide an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
Signal Terminal 4	1	1
Signal (+) Terminal 8	2	2	2
Signal (-) Terminal 6	2	2	2
Ground		1
1. Infra Red Module Inoperative - Remote Control Inoperative 2. Remote Control Inoperative

The infrared transmitter is grounded and powered by the rear seat audio (RSA) module. When a key on the remote is pressed, the remote control sends an infrared message to infrared transmitter. The infrared transmitter will convert these infrared signals into a frequency and send that message to the radio via the remote infrared signal circuits (+) and (-).

Schematic Reference

Connector End View Reference

Video Entertainment System Description and Operation (Non-Headrest DVD Systems) , Video Entertainment System Description and Operation (Dual Headrest DVD Systems)

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, Radio ON, DVD playing, when aiming the remote control at the infrared transmitter, you will see LED's to indicate activity.

Note. Test or replace the remote batteries before performing the circuit/system test.

Ignition OFF, disconnect the harness connector at the infrared transmitter.
Test for less than 10 ohms between the ground circuit terminal 12 and ground. If greater than specified range, test the ground circuit for an open/high resistance.
Ignition ON, DVD playing, test for B+ between the signal circuit terminal 4 and ground. If less than specified value, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio/HVAC control-auxiliary module.
Ignition ON, DVD playing, test for 0.75-2 V between the signal (+) circuit terminal 8 and ground. If less than 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 specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
Ignition ON, DVD playing, test for less than 1 V between the signal (-) circuit terminal 16 and ground. If greater than specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
Reconnect the harness connector at the infrared transmitter, and disconnect the X3 harness connector at the radio.
Ignition ON, DVD playing, test for 4-6 mV AC between the signal (+) circuit terminal 5 and ground. If less than specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the infrared transmitter. If greater than specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the infrared transmitter.
Ignition ON, DVD playing, test for 4-6 mV AC between the signal (-) circuit terminal 13 and ground. If less than specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the infrared transmitter. If greater than specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the infrared transmitter.
Ignition ON, DVD playing, press any button on the remote control aimed at the infrared transmitter and test for 300-330 MHz between the signal (+) circuit terminal 5 and ground. If not within the specified range, replace the remote control.
If all circuits test normal, replace the radio.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Audio System Transceiver Module Replacement (U42)»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system) , «Audio System Transceiver Module Replacement (U42/C3U)»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for radio replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provide an overview of each diagnostic category.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
Infrared Module Supply Voltage	1	1
Infrared Module Ground		1
Left DVD Audio Signal (+)	2	2	2
Right DVD Audio Signal (+)	3	3	3
DVD Audio Common Signal (-)	4	4	4
Left Infrared Audio Signal (+)	5	5	5
Right Infrared Audio Signal (+)	6	6	6
Infrared Audio Low Reference (+)	7	7	7
1. Infra Red Module Inoperative - headphones inoperative. 2. No or distorted left audio when listening to DVD. 3. No or distorted right audio when listening to DVD. 4. No or distorted audio on both channels when listening to DVD. 5. No or distorted left audio when listening to rear seat audio. 6. No or distorted right audio when listening to rear seat audio. 7. No or distorted audio on both channels when listening to rear seat audio.

The rear seat entertainment (RSE) system consists of two, 2-channel wireless headphones that are dedicated to the system. Channel 1 is dedicated to the video screen, while 2 is dedicated to rear seat audio (RSA) selections. The infrared module receives voltage from the rear audio/HVAC module when the RSA in ON. For DVD audio playback, the infrared module receives audio inputs directly from the radio. For all other audio sources, the radio audio signals are sent to the rear audio/HVAC module, which then provides those audio inputs to the infrared module to be broadcast to the headphones.

Schematic Reference

Connector End View Reference

Video Entertainment System Description and Operation (Non-Headrest DVD Systems) , Video Entertainment System Description and Operation (Dual Headrest DVD Systems)

Description and Operation

Electrical Information Reference

«Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
«Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
«Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
«Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Turn ON the wireless headphones. Verify the power indicator lamp on the wireless headphone illuminates. If the power indicator lamp does not illuminate, test or replace the wireless headphone batteries. If the batteries are OK replace the appropriate wireless headphone.
Radio ON, RSA ON, and DVD playing, verify audio is heard through all of the wireless headphones. If all of the headphones are inoperative, or the sound is distorted, refer to Circuit/System Testing. If only one of the headphones is not producing sound, or the sound is distorted, replace the appropriate wireless headphone.

Ignition OFF, disconnect the harness connector at the infrared transmitter.
Ignition OFF, test for less than 5 ohms between the ground circuit terminal 12 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
Ignition ON, RSA ON, test for B+ between the control circuit terminal 4 and ground. If less than the specified value, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the rear audio/HVAC module.
Ignition ON, DVD playing, test for varying AC voltage between the signal circuit terminals listed below and ground. Left DVD audio signal (+) - terminal 1 DVD audio common (-) - terminal 2 Right DVD audio signal (+) - terminal 3 If AC voltage is not present, test the signal circuit for a short to voltage, short to ground, or an open/high resistance. If the circuit tests normal, replace the radio.
Ignition ON, RSA ON, test for varying AC voltage between the signal circuit terminals listed below and ground. Left infrared audio signal (+) - terminal 9 Infra red audio low reference (-) - terminal 10 Right infrared audio signal (+) - terminal 11 If AC voltage is not present, test the signal circuit for a short to voltage, short to ground, or an open/high resistance. If the circuit tests normal, replace the rear audio/HVAC module.
If all circuits test normal, test or replace the infrared transmitter.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

«Audio System Transceiver Module Replacement (U42)»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system) , «Audio System Transceiver Module Replacement (U42/C3U)»(/buick/enclave/i-2007-2013/remont/entertainment-systems/#cellular-system-entertainment-system-and-navigation-system)
«Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Rear Audio/HVAC module replacement, setup, and programming

Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
«Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The CIM is capable of interpreting voice commands received over the cellular microphone circuits. Speech recognition allows the user to speak to one computer in the vehicle, and one reached over the cellular communication network. The module attempts to understand the users command, and responds by speaking back, or by taking the appropriate action, e.g. dialing the phone.

Schematic Reference

Connector End View Reference

Description and Operation