Pinpoint Test E: Poor Quality/Distorted/No Sound From One Or More Speakers (Not All Speakers) - Sony(R) Sound
Information and Entertainment System
Pinpoint Test E: Poor Quality/Distorted/No Sound From One Or More Speakers (Not All Speakers) - Sony(R) Sound
Refer to Wiring Diagram Set 130, Audio System/Navigation for schematic and connector information. [1][2]Diagrams By Number
Normal Operation
The Audio Control Module (ACM) directs the audio signals to the audio Digital Signal Processing (DSP) module in the form of an AC voltage. The audio DSP (Digital Signal Processing) module boosts the audio signals and sends them to the speakers. The audio DSP (Digital Signal Processing) module provides internal circuit protection for shorts to ground or shorts to voltage.
A short to ground or short to voltage in the circuit 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 followed to isolate the damaged circuit.
The ACM (Audio Control Module) sends the audio signals to the audio DSP (Digital Signal Processing) module in the following banks:
For vehicles with navigation, it is also important to note that if the navigation voice guidance setting is set too low, it may appear that the front speakers intermittently produce no sound. Make sure the voice guidance setting is set high enough to hear the voice guidance commands 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.
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Speaker
- Audio DSP (Digital Signal Processing) module
- ACM (Audio Control Module)
PINPOINT TEST E : POOR QUALITY/DISTORTED/NO SOUND FROM ONE OR MORE SPEAKERS (NOT ALL SPEAKERS) - SONY(R) SOUND
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings.
E1 CHECK FOR AN AUDIO SIGNAL TO THE SUSPECT SPEAKER
- 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 LH front door C523-1 VME07 (WH) C523-2 RME07 (WH/BN) RH front door C612-1 VME10 (WH/VT) C612-2 RME10 (WH/OG) LH rear door C702-1 VME09 (WH/GN) C702-2 RME09 (BN/YE) RH rear door C802-1 VME12 (BN/WH) C802-2 RME12 (BN/BU) Instrument panel speaker C2359-1 VME06 (GN) C2359-2 RME06 (GY/YE) LH tweeter C591-1 VME08 (GN/OG) C591-2 RME08 (GY/OG) RH tweeter C691-1 VME11 (VT/OG) C691-2 RME11 (YE/OG) Rear center speaker C3306-1 VME30 (GN/BN) C3306-2 RME30 (VT/BN) LH Subwoofer C3120-1 VME01 (GN/VT) C3120-2 RME01 (GY) RH Subwoofer C3121-1 VME02 (VT) C3121-2 VME02 (YE)
Is a fluctuating AC voltage present?
Yes
INSTALL a new speaker for the suspect speaker. REFER to the appropriate removal and installation procedure. TEST the system for normal operation.
No
GO to E2.
E2 CHECK THE AUDIO DSP (Digital Signal Processing) MODULE VOLTAGE SUPPLY
- Ignition OFF.
- Disconnect: Audio DSP (Digital Signal Processing) Module C4240A.
- Measure the voltage between the audio DSP (Digital Signal Processing) module, harness side and ground as follows:
Positive Meter Lead Negative Meter Lead C4240A-5 SBP19 (BU/RD) Ground C4240A-6 SBP19 (BU/RD) Ground
Are the voltages greater than 10 volts?
Yes
GO to E3.
No
VERIFY the Battery Junction Box (BJB) fuse 19 (25A) is OK. If OK, REPAIR the circuit in question. TEST the system for normal operation. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short. [1][2]Diagrams By Number
E3 CHECK THE AUDIO DSP (Digital Signal Processing) MODULE GROUND CIRCUITS FOR CONTINUITY
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the audio amplifier, harness side and ground as follows:
Positive Meter Lead Negative Meter Lead C4240A-13 GD148 (BK/YE) Ground C4240A-14 GD148 (BK/YE) Ground
Are the resistances less than 5 ohms?
Yes
GO to E4.
No
REPAIR the circuit in question. TEST the system for normal operation.
E4 CHECK FOR AN AUDIO SIGNAL AT THE AUDIO DSP (Digital Signal Processing) MODULE
- Ignition OFF.
- Connect: Audio DSP (Digital Signal Processing) Module C4240A.
- Disconnect: Audio DSP (Digital Signal Processing) Module C4240C.
- 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:
Suspect Speaker Positive Meter Lead Negative Meter Lead LH front door or LH tweeter C4240C-7 VME07 (WH) C4240C-17 RME07 (WH/BN) RH front door or RH tweeter C4240C-9 VME10 (WH/VT) C4240C-19 RME10 (WH/OG) LH rear door C4240C-8 VME09 (WH/GN) C4240C-18 RME09 (BN/YE) RH rear door C4240C-10 VME12 (BN/WH) C4240C-20 RME12 (BN/BU) Instrument panel or rear center C4240C-6 VME51 (BN/BU) C4240C-16 RME51 (WH/BU) Subwoofer C4240C-5 VME22 (VT/GN) C4240C-15 RME22 (GN/WH)
Is a fluctuating AC voltage present?
Yes
GO to E5.
No
GO to E7.
E5 CHECK THE SPEAKER CIRCUITS FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Connect: Audio DSP (Digital Signal Processing) Module C4240C.
- Disconnect: Audio DSP (Digital Signal Processing) Module C4240B (Except Subwoofer Concern).
- Disconnect: Audio DSP (Digital Signal Processing) Module C4240A (Subwoofer Concern).
- Ignition ON.
- Measure the voltage between the suspect speaker, harness side and ground as follows:
Suspect Speaker Positive Meter Lead Negative Meter Lead LH front door C591-1 VME08 (GN/OG) Ground C591-2 RME08 (GY/OG) Ground RH front door C612-1 VME10 (WH/VT) Ground C612-2 RME10 (WH/OG) Ground LH rear door C702-1 VME09 (WH/GN) Ground C702-2 RME09 (BN/YE) Ground RH rear door C802-1 VME12 (BN/WH) Ground C802-2 RME12 (BN/BU) Ground Instrument panel C2359-1 VME06 (GN) Ground C2359-2 RME06 (GY/YE) Ground LH tweeter C591-1 VME08 (GN/OG) Ground C591-2 RME08 (GY/OG) Ground RH tweeter C691-1 VME11 (VT/OG) Ground C691-2 RME11 (YE/OG) Ground Rear center speaker C3306-1 VME30 (GN/BN) Ground C3306-2 RME30 (VT/BN) Ground LH subwoofer C3120-1 VME01 (GN/VT) Ground C3120-2 RME01 (GY) Ground RH subwoofer C3121-1 VME02 (VT) Ground C3121-2 RME02 (YE) Ground
Is any voltage present?
Yes
REPAIR the circuit in question. TEST the system for normal operation.
No
GO to E6.
E6 CHECK THE SPEAKER CIRCUITS FOR AN OPEN OR SHORT TO GROUND
- Ignition OFF.
- Measure the resistance between the audio DSP (Digital Signal Processing) module, harness side and the suspect speaker, harness side; and between the audio DSP (Digital Signal Processing) module, harness side and ground as follows:
Suspect Speaker Positive Meter Lead Negative Meter Lead Circuit LH front door C4240B-2 C523-1, then ground VME07 (WH) C4240B-10 C523-2, then ground RME07 (WH/BN) RH front door C4240B-6 C612-1, then ground VME10 (WH/VT) C4240B-14 C612-2, then ground RME10 (WH/OG) LH rear door C4240B-4 C702-1, then ground VME09 (WH/GN) C4240B-12 C702-2, then ground RME09 (BN/YE) RH rear door C4240B-8 C802-1, then ground VME12 (BN/WH) C4208B-16 C802-2, then ground RME12 (BN/BU) Instrument panel C4240B-1 C2359-1, then ground VME06 (GN) C4240B-9 C2359-2, then ground RME06 (GY/YE) LH tweeter C4240B-3 C591-1, then ground VME08 (GN/OG) C4240B-11 C591-2, then ground RME08 (GY/OG) RH tweeter C4240B-7 C691-1, then ground VME11 (VT/OG) C4240B-15 C691-2, then ground RME11 (YE/OG) Rear center speaker C4240B-5 C3306-1, then ground VME30 (GN/BN) C4208B-13 C3306-3, then ground RME30 (VT/BN) LH Subwoofer C4240A-1 C3120-1, then ground VME01 (GN/VT) C4240A-9 C3120-2, then ground RME01 (GY) RH Subwoofer C4240A-2 C3121-1, then ground VME02 (VT) C4240A-10 C3121-2, then ground RME02 (YE)
Are the resistances less than 5 ohms between the audio DSP (Digital Signal Processing) module and the suspect speaker, and greater than 10,000 ohms between the audio DSP (Digital Signal Processing) module and ground?
Yes
GO to E10.
No
REPAIR the circuit in question. TEST the system for normal operation.
E7 CHECK THE AUDIO CIRCUITS TO THE AUDIO DSP (Digital Signal Processing) MODULE FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: ACM (Audio Control Module) C240A (Except Subwoofer Concern).
- Disconnect: ACM (Audio Control Module) C240D (Subwoofer Concern).
- Disconnect: Audio DSP (Digital Signal Processing) Module C4240C.
- Ignition ON.
- Measure the voltage between the audio DSP (Digital Signal Processing) module pins, harness side and ground as follows:
Suspect Speaker Positive Meter Lead Negative Meter Lead LH front door or LH A-pillar C4240C-7 VME07 (WH) Ground C4240C-17 RME07 (WH/BN) Ground RH front door or RH A-pillar C4240C-9 VME10 (WH/VT) Ground C4240C-19 RME10 (WH/OG) Ground LH rear door or LH D-pillar C4240C-8 VME09 (WH/GN) Ground C4240C-18 RME09 (BN/YE) Ground RH rear door or RH D-pillar C4240C-10 VME12 (BN/WH) Ground C4240C-20 RME12 (BN/BU) Ground Instrument panel or rear center C4240C-6 VME51 (BN/BU) Ground C4240C-16 RME51 (WH/BU) Ground Subwoofer C4240C-5 VME22 (VT/GN) Ground C4240C-15 RME22 (GN/WH) Ground
Is any voltage present?
Yes
REPAIR the circuit in question. CLEAR any DTCs present. TEST the system for normal operation.
No
GO to E8.
E8 CHECK THE AUDIO CIRCUITS TO THE AUDIO DSP (Digital Signal Processing) 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:
Suspect Speaker Positive Meter Lead Negative Meter Lead Circuit LH front door or LH tweeter C4240C-7 C240A-8, then ground VME07 (WH) C4240C-17 C240A-21, then ground RME07 (WH/BN) RH front door or RH tweeter C4240C-9 C240A-11, then ground VME10 (WH/VT) C4240C-19 C240A-12, then ground RME10 (WH/OG) LH rear door C4240C-8 C240A-9, then ground VME09 (WH/GN) C4240C-18 C240A-22, then ground RME09 (BN/YE) RH rear door C4240C-10 C240A-10, then ground VME12 (BN/WH) C4240C-20 C240A-23, then ground RME12 (BN/BU) Instrument panel or rear center C4240C-6 C240D-5, then ground VME51 (BN/BU) C4240C-16 C240D-6, then ground RME51 (WH/BU) Subwoofer C4240C-5 C240D-1, then ground VME22 (VT/GN) C4240C-15 C240D-2, then ground RME22 (GN/WH)
Are the resistances less than 5 ohms between the audio DSP (Digital Signal Processing) module and the ACM (Audio Control Module) and greater than 10,000 ohms between the audio DSP (Digital Signal Processing) module and ground?
Yes
GO to E9.
No
REPAIR the circuit in question. CLEAR any DTCs present. TEST the system for normal operation.
E9 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 all 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) - Fusion or Audio Control Module (ACM) - MKZ . 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. CLEAR any DTCs present.
E10 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 all 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. CLEAR any DTCs present.