Pinpoint Test B: Poor Quality Or No Sound From One Or More Speakers (Not All Speakers)
Information and Entertainment System
Pinpoint Test B: Poor Quality Or No Sound From One Or More Speakers (Not All Speakers) - Edge
Refer to Wiring Diagram Set 130, Audio System/Navigation for schematic and connector information Electrical Diagrams.
Normal Operation - Base And Premium Audio
The Audio Control Module (ACM) directs audio signals to the speakers in the form of a fluctuating AC voltage. The tweeter speakers (if equipped) are wired in series with the front door speakers.
A short to ground or short to voltage in the circuitry to one of the speakers may cause multiple speakers to lose sound due to the built-in overload protection feature of the ACM (Audio Control Module). In this case, a speaker fault DTC sets, and this pinpoint test should be followed to isolate the damaged circuit.
ACM (Audio Control Module) Speaker Fault DTCs
Normal Operation - Sony(R) Audio
The Audio Control Module (ACM) directs audio signals to the audio DSP (Digital Signal Processing) module in the form of a fluctuating AC voltage. The ACM (Audio Control Module) and the audio DSP (Digital Signal Processing) module provide internal protection for shorts to ground and shorts to voltage.
A short to ground or short to voltage in the circuitry to one of the speakers may cause multiple speakers to lose sound due to the built-in overload protection feature of the audio DSP (Digital Signal Processing) module. In this case, a speaker fault DTC sets, and this pinpoint test should be carried out to isolate the damaged circuit.
It may appear that the front speakers intermittently produce no sound due to volume settings or alerts present. Verify that the navigation voice and voice recognition volume settings are set high enough. Check for presence of SIRIUS(R) data services alerts, song alerts, incoming phone calls and parking aid sounder status before addressing a concern with the front speakers.
The speaker walk test can be used to isolate a concern with a particular speaker. This can reduce the diagnostic steps necessary to isolate the concern. To carry out the speaker walk test, refer to Audio Control Module (ACM) Self-Diagnostic Mode Service and Repair.
Audio DSP (Digital Signal Processing) Module Speaker Fault DTCs
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Speaker
- ACM (Audio Control Module)
- Audio DSP (Digital Signal Processing) module (Sony(R) audio)
PINPOINT TEST B : POOR QUALITY OR NO SOUND FROM ONE OR MORE SPEAKERS (NOT ALL SPEAKERS) - EDGE
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
B1 CHECK THE AUDIO SIGNALS TO THE SUSPECT SPEAKER
- Ignition ON.
- Carry out the speaker walk test to identify the suspect speaker. Refer to Audio Control Module (ACM) Self-Diagnostic Mode Service and Repair.
- Ignition OFF.
- Disconnect: Suspect Speaker.
- Operate the audio system in radio tuner (AM/FM) mode.
- Measure the AC voltage between the suspect speaker pins, harness side as follows:
Suspect Speaker Positive Meter Lead Negative Meter Lead LF door C536-1 VME07 (WH) C536-2 RME07 (WH/BN) RF door C628-1 VME10 (WH/VT) C628-2 RME10 (WH/OG) LR door C702-1 VME09 (WH/GN) C702-2 RME09 (BN/YE) RR door C802-1 VME12 (BN/WH) C802-2 RME12 (BN/BU) Instrument panel (Sony(R)) C2356-1 VME06 (GN) C2356-2 RME06 (GY/YE) LH front tweeter (Sony(R)) C2421-1 VME08 (GN/OG) C2421-2 RME08 (GY/OG) RH front tweeter (Sony(R)) C2420-1 VME11 (VT/OG) C2420-2 RME11 (YE/OG) LH D-pillar (Sony(R)) C4337-1 VME39 (GN/BN) C4337-2 RME39 (GY/BN) RH D-pillar (Sony(R)) C4338-1 VME39 (GN/BN) C4338-2 RME39 (GY/BN) Subwoofer #1 (Sony(R)) C4212-1 VME02 (VT) C4212-2 RME02 (YE) Subwoofer #2 (Sony(R)) C4212-3 VME01 (GN/VT) C4212-4 RME01 (GY)
Is a fluctuating AC voltage present?
Yes
INSTALL a new speaker for the suspect speaker. REFER to Speaker - Subwoofer , Speaker - Door , Speaker - Instrument Panel , Speaker - A-Pillar or D-Pillar Trim Panel in Trim Panel. TEST the system for normal operation.
No
GO to B2.
B2 CHECK THE CIRCUITS TO THE SUSPECT SPEAKER FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: ACM (Audio Control Module) C240A (Base and Premium Audio).
- Disconnect: Audio DSP (Digital Signal Processing) Module C4326B (Sony(R) Audio).
- Ignition ON.
- Turn the audio system off.
- Measure the voltage between the suspect speaker pins, harness side and ground as follows:
Suspect Speaker Positive Meter Lead Negative Meter Lead LF door C536-1 VME07 (WH) Ground C536-2 RME07 (WH/BN) Ground RF door C628-1 VME10 (WH/VT) Ground C628-2 RME10 (WH/OG) Ground LR door C702-1 VME09 (WH/GN) Ground C702-2 RME09 (BN/YE) Ground RR door C802-1 VME12 (BN/WH) Ground C802-2 RME12 (BN/BU) Ground Instrument panel (Sony(R)) C2356-1 VME06 (GN) Ground C2356-2 RME06 (GY/YE) Ground LH front tweeter (Sony(R)) C2421-1 VME08 (GN/OG) Ground C2421-2 RME08 (GY/OG) Ground RH front tweeter (Sony(R)) C2420-1 VME11 (VT/OG) Ground C2420-2 RME11 (YE/OG) Ground LH D-pillar (Sony(R)) C4337-1 VME39 (GN/BN) Ground C4337-2 RME39 (GY/BN) Ground RH D-pillar (Sony(R)) C4338-1 VME39 (GN/BN) Ground C4338-2 RME39 (GY/BN) Ground Subwoofer #1 (Sony(R)) C4212-1 VME02 (VT) Ground C4212-2 RME02 (YE) Ground Subwoofer #2 (Sony(R)) C4212-3 VME01 (GN/VT) Ground C4212-4 RME01 (GY) Ground
Is any voltage present?
Yes
REPAIR the circuit in question. CLEAR any DTCs present. TEST the system for normal operation.
No
For base and premium audio, GO to B3. For Sony(R) audio, GO to B4.
B3 CHECK THE CIRCUITS TO THE SUSPECT SPEAKER FOR AN OPEN OR SHORT TO GROUND - BASE AND PREMIUM AUDIO
- Ignition OFF.
- Measure the resistance between the suspect speaker, harness side and the ACM (Audio Control Module), harness side; and between the suspect speaker, harness side and ground as follows:
Suspect Speaker Positive Meter Lead Negative Meter Lead Circuit LF door C536-1 C240A-22, then ground VME07 (WH) C536-2 C240A-10, then ground RME07 (WH/BN) RF door C628-1 C240A-23, then ground VME10 (WH/VT) C628-2 C240A-11, then ground RME10 (WH/OG) LR door C702-1 C240A-21, then ground VME09 (WH/GN) C702-2 C240A-9, then ground RME09 (BN/YE) RR door C802-1 C240A-24, then ground VME12 (BN/WH) C802-2 C240A-12, then ground RME12 (BN/BU)
Is the resistance less than 5 ohms between the suspect speaker and the ACM (Audio Control Module), and greater than 10,000 ohms between the suspect speaker and ground?
Yes
GO to B8.
No
REPAIR the circuit in question. CLEAR any DTCs present. TEST the system for normal operation.
B4 CHECK THE CIRCUITS TO THE SUSPECT SPEAKER FOR AN OPEN OR SHORT TO GROUND - SONY(R) AUDIO
- Ignition OFF.
- Measure the resistance between the suspect speaker, harness side and the audio Digital Signal Processing (DSP) module, harness side; and between the suspect speaker, harness side and ground as follows:
Suspect Speaker Positive Meter Lead Negative Meter Lead Circuit LF door C536-1 C4326B-2, then ground VME07 (WH) C536-2 C4326B-10, then ground RME07 (WH/BN) RF door C628-1 C4326B-6, then ground VME10 (WH/VT) C628-2 C4626B-14, then ground RME10 (WH/OG) LR door C702-1 C4326B-4, then ground VME09 (WH/GN) C702-2 C4326B-12, then ground RME09 (BN/YE) RR door C802-1 C4326B-8, then ground VME12 (BN/WH) C802-2 C4326B-16, then ground RME12 (BN/BU) Instrument panel C2356-1 C4326B-1, then ground VME06 (GN) C2356-2 C4326B-9, then ground RME06 (GY/YE) LH front tweeter C2421-1 C4326B-3, then ground VME08 (GN/OG) C2421-2 C4326B-11, then ground RME08 (GY/OG) RH front tweeter C2420-1 C4326B-7, then ground VME11 (VT/OG) C2420-2 C4326B-15, then ground RME11 (YE/OG) LH D-pillar C4337-1 C4326B-5, then ground VME39 (GN/BN) C4337-2 C4326B-13, then ground RME39 (GY/BN) RH D-pillar C4338-1 C4326B-5, then ground VME39 (GN/BN) C4338-2 C4326B-13, then ground RME39 (GY/BN) Subwoofer #1 (Sony(R)) C4212-1 C4326C-1, then ground VME02 (VT) C4212-2 C4326C-9, then ground RME02 (YE) Subwoofer #2 (Sony(R)) C4212-3 C4326C-2, then ground VME01 (GN/VT) C4212-4 C4326C-10, then ground RME01 (GY)
Is the resistance less than 5 ohms between the suspect speaker and the audio DSP (Digital Signal Processing) module and greater than 10,000 ohms between the suspect speaker and ground?
Yes
GO to B5.
No
REPAIR the circuit in question. CLEAR any DTCs present. TEST the system for normal operation.
B5 CHECK THE AUDIO SIGNALS TO THE AUDIO DSP (Digital Signal Processing) MODULE
- Ignition OFF.
- Disconnect: Audio DSP (Digital Signal Processing) Module C4326A.
- Operate the audio system in radio tuner (AM/FM) mode.
- Measure the AC voltage between the audio DSP (Digital Signal Processing) module pins, harness side as follows:
Speaker Channel Positive Meter Lead Negative Meter Lead Left C4326A-7 VME58 (YE/VT) C4326A-17 RME58 (BN/BU) Right C4326A-9 VME18 (VT) C4326A-19, RME18 (YE)
Is a fluctuating AC voltage present?
Yes
GO to B9.
No
GO to B6.
B6 CHECK THE CIRCUITS BETWEEN THE AUDIO DSP (Digital Signal Processing) MODULE AND ACM (Audio Control Module) FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Measure the voltage between the audio DSP (Digital Signal Processing) module, harness side and ground as follows:
Speaker Channel Positive Meter Lead Negative Meter Lead Left + C4326A-7 VME58 (YE/VT) Ground Left - C4326A-17 RME58 (BN/BU) Ground Right + C4326A-9 VME18 (VT) Ground Right - C4326A-19 RME18 (YE) Ground
Is any voltage present?
Yes
REPAIR the circuit in question. CLEAR any DTCs present. TEST the system for normal operation.
No
GO to B7.
B7 CHECK THE CIRCUITS BETWEEN THE AUDIO DSP (Digital Signal Processing) MODULE AND ACM (Audio Control Module) FOR AN OPEN OR SHORT TO GROUND
- Ignition OFF.
- Measure the resistance between the audio DSP (Digital Signal Processing) module, harness side and the ACM (Audio Control Module), harness side; and between the audio DSP (Digital Signal Processing) module, harness side and ground as follows:
Speaker Channel Positive Meter Lead Negative Meter Lead Circuit Left + C4326A-7 C240A-22, then ground VME58 (YE/VT) Left - C4326A-17 C240A-10, then ground RME58 (BN/BU) Right + C4326A-9 C240A-23, then ground VME18 (VT) Right - C4326A-19, C240A-11, then ground RME18 (YE)
Is the resistance less than 5 ohms between the audio DSP (Digital Signal Processing) module and the ACM (Audio Control Module) and than
10,000 ohms between the audio DSP (Digital Signal Processing) module and ground?
Yes
GO to B8.
No
REPAIR the circuit in question. CLEAR any DTCs present. TEST the system for normal operation.
B8 CHECK FOR CORRECT ACM (Audio Control Module) OPERATION
- Ignition OFF.
- Connect: All Disconnected Connectors.
- Disconnect all the ACM (Audio Control Module) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the ACM (Audio Control Module) connectors and make sure they seat correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes
INSTALL a new ACM (Audio Control Module). REFER to Audio Control Module (ACM) . TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
B9 CHECK FOR CORRECT AUDIO DSP (Digital Signal Processing) MODULE OPERATION
- Ignition OFF.
- Connect: All Disconnected Connectors.
- Disconnect all the audio DSP (Digital Signal Processing) module connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the audio DSP (Digital Signal Processing) module connectors and make sure they seat correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes
INSTALL a new audio DSP (Digital Signal Processing) module. REFER to Audio Digital Signal Processing (DSP) Module . TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.