Pinpoint Test C: Poor Quality/Distorted/No Sound From One Or More Speakers (Not All Speakers) - Sony(R) Sound
Information and Entertainment System
Pinpoint Test C: Poor Quality/Distorted/No Sound From One Or More Speakers (Not All Speakers) - Sony(R) Sound
Refer to Wiring Diagrams Set 130, Audio System/Navigation for schematic and connector information. Electrical Diagrams
Normal Operation
The Audio Control Module (ACM) directs audio signals to the audio Digital Signal Processing (DSP) module in the form of an AC voltage. The audio DSP (Digital Signal Processing) module sends amplified audio signals to the subwoofer enclosure. The ACM (Audio Control Module) provides internal circuit protection for shorts to ground or shorts to voltage.
If the vehicle is equipped with the family entertainment system, the rear channel audio signals from the ACM (Audio Control Module) route to the Rear Entertainment Module (RETM), then to the audio DSP (Digital Signal Processing) module. In dual-play mode, the RETM (Rear Entertainment Module) mutes the rear speaker output. Make sure the audio system is in single-play mode before diagnosing a speaker concern by confirming the headphone icon is displayed in the ACM (Audio Control Module) display.
A short to ground or short to voltage in the circuitry to one of the speakers can cause that speaker 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 audio DSP (Digital Signal Processing) module is enabled through software. Additionally, the ACM (Audio Control Module) can mute the audio DSP (Digital Signal Processing) module through the mute/unmute circuit. In the event of an overload, the audio DSP (Digital Signal Processing) module clips the audio output signal to the speakers and subwoofer (heard as distortion) in order to prevent damage to the speakers.
Non-Navigation ACM (Audio Control Module) DTCs
- DTC B2965 (Audio System Speaker Circuit Fault)- sets when an open, short to ground, or short to voltage is detected on any of the speaker circuits to the audio DSP (Digital Signal Processing) module. If the ACM (Audio Control Module) activates the built-in overload protection, DTC B1342 may also be set. The cause of DTC B2965 must be repaired before DTC B1342 can be cleared.
Navigation ACM (Audio Control Module) DTCs
NOTE: These DTCs only set when a fault is detected in the circuitry between the ACM (Audio Control Module) and the audio DSP (Digital Signal Processing) module.
Audio Digital Signal Processing (DSP) Module DTCs
NOTE: These DTCs only set when a fault is detected in the circuitry between the audio DSP (Digital Signal Processing) module and the speaker.
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Speaker
- Audio DSP (Digital Signal Processing) module
- RETM (Rear Entertainment Module) (if equipped)
- ACM (Audio Control Module)
PINPOINT TEST C : 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.
C1 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 C553-1 VME07 (WH) C553-2 RME07 (WH/BN) RH front door C652-1 VME10 (WH/VT) C652-2 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 C2358-1 VME06 (GN) C2358-2 RME06 (GY/YE) LH A-pillar C230-1 VME08 (GN/OG) C230-2 RME08 (GY/OG) RH A-pillar C231-1 VME11 (VT/OG) C231-2 RME11 (YE/OG) LH D-pillar C3432-1 VME39 (GN/BN) C3432-3 RME39 (GY/BN) RH D-pillar C3431-1 VME39 (GN/BN) C3431-3 RME39 (GY/BN) Subwoofer #1 C3041-1 VME01 (GN/VT) C3041-2 RME01 (GY) Subwoofer #2 C3041-3 VME02 (VT) C3041-4 RME02 (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 C2.
C2 CHECK THE AUDIO DSP (Digital Signal Processing) MODULE VOLTAGE SUPPLY
- Ignition OFF.
- Disconnect: Audio DSP (Digital Signal Processing) Module C4208C.
- Measure the voltage between the audio DSP (Digital Signal Processing) module, harness side and ground as follows:
Positive Meter Lead Negative Meter Lead C4208C-5 SBB07 (WH/RD) Ground C4208C-6 SBB07 (WH/RD) Ground C4208C-7 SBB07 (WH/RD) Ground C4208C-8 SBB07 (WH/RD) Ground
Are the voltages greater than 10 volts?
Yes
GO to C3.
No
VERIFY the Battery Junction Box (BJB) fuse 7 (30A) 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. Electrical Diagrams
C3 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 C4208C-13 GD148 (BK/YE) Ground C4208C-14 GD148 (BK/YE) Ground C4208C-15 GD148 (BK/YE) Ground C4208C-16 GD148 (BK/YE) Ground
Are the resistances less than 5 ohms?
Yes
GO to C4.
No
REPAIR the circuit in question. TEST the system for normal operation.
C4 CHECK FOR AN AUDIO SIGNAL AT THE AUDIO DSP (Digital Signal Processing) MODULE
- Ignition OFF.
- Connect: Audio DSP (Digital Signal Processing) Module C4208C.
- Disconnect: Audio DSP (Digital Signal Processing) Module C4208A.
- Operate the audio system in radio tuner (AM/FM) mode.
- Measure the AC voltage between the audio amplifier pins, harness side as follows:
Suspect Speaker Positive Meter Lead Negative Meter Lead LH front door or LH A-pillar C4208A-7 VME07 (WH) C4208A-17 RME07 (WH/BN) RH front door or RH A-pillar C4208A-9 VME10 (WH/VT) C4208A-19 RME10 (WH/OG) LH rear door or LH D-pillar C4208A-8 VME09 (WH/GN) C4208A-18 RME09 (BN/YE) RH rear door or RH D-pillar C4208A-10 VME12 (BN/WH) C4208A-20 RME12 (BN/BU) Instrument panel speaker C4208A-6 VME51 (BN/BU) C4208A-16 RME51 (WH/BU) Subwoofer C4208A-5 VME22 (VT/GN) C4208A-15 RME22 (GN/WH)
Is a fluctuating AC voltage present?
Yes
GO to C5.
No
If the vehicle is equipped with the family entertainment system and the concern is with a rear door speaker or D-pillar speaker, GO to C7.
Otherwise, GO to C10.
C5 CHECK THE SPEAKER CIRCUITS FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Connect: Audio DSP (Digital Signal Processing) Module C4208A.
- Disconnect: Audio DSP (Digital Signal Processing) Module C4208B (Except Subwoofer Concern).
- Disconnect: Audio DSP (Digital Signal Processing) Module C4208C (Subwoofer Concern).
- Ignition ON.
- Measure the voltage between the suspect speaker (or subwoofer amplifier), harness side and ground as follows:
Suspect Speaker Positive Meter Lead Negative Meter Lead LH front door C553-1 VME07 (WH) Ground C553-2 RME07 (WH/BN) Ground RH front door C652-1 VME10 (WH/VT) Ground C652-2 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 C2358-1 VME06 (GN) Ground C2358-2 RME06 (BN/BU) Ground LH A-pillar C230-1 VME08 (GN/OG) Ground C230-2 RME08 (GY/OG) Ground RH A-pillar C231-1 VME11 (VT/OG) Ground C231-2 RME11 (YE/OG) Ground LH D-pillar C3432-1 VME39 (GN/BN) Ground C3432-3 RME39 (GY/BN) Ground RH D-pillar C3431-1 VME39 (GN/BN) Ground C3431-3 RME39 (GY/BN) Ground Subwoofer #1 C3041-1 VME01 (GN/VT) Ground C3041-2 RME01 (GY) Ground Subwoofer #2 C3041-3 VME02 (VT) Ground C3041-4 RME02 (YE) Ground
Is any voltage present?
Yes
REPAIR the circuit in question. TEST the system for normal operation.
No
GO to C6.
C6 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 C4208B-2 C553-1, then ground VME07 (WH) C4208B-10 C553-2, then ground RME07 (WH/BN) RH front door C4208B-6 C652-1, then ground VME10 (WH/VT) C4208B-14 C652-2, then ground RME10 (WH/OG) LH rear door C4208B-4 C702-1, then ground VME09 (WH/GN) C4208B-12 C702-2, then ground RME09 (BN/YE) RH rear door C4208B-8 C802-1, then ground VME12 (BN/WH) C4208B-16 C802-2, then ground RME12 (BN/BU) Instrument panel C4208B-1 C2358-1, then ground VME06 (GN) C4208B-9 C2358-2, then ground RME06 (GY/YE)
Suspect Speaker Positive Meter Lead Negative Meter Lead Circuit LH A-pillar C4208B-3 C230-1, then ground VME08 (GN/OG) C4208B-11 C230-2, then ground RME08 (GY/OG) RH A-pillar C4208B-7 C231-1, then ground VME11 (VT/OG) C4208B-15 C231-2, then ground RME11 (YE/OG) LH D-pillar C4208B-5 C3432-1, then ground VME39 (GN/BN) C4208B-13 C3432-3, then ground RME39 (GY/BN) RH D-pillar C4208B-5 C3431-1, then ground VME39 (GN/BN) C4208B-13 C3431-3, then ground RME39 (GY/BN) Subwoofer #1 C4208C-1 C3041-1, then ground VME01 (GN/VT) C4208C-9 C3041-2, then ground RME01 (GY) Subwoofer #2 C4208C-2 C3041-3, then ground VME02 (VT) C4208C-10 C3041-4, then ground RME02 (YE)
Are the resistances less than 5 ohms between the audio DSP (Digital Signal Processing) module and the suspect speaker (or subwoofer amplifier), and greater than 10,000 ohms between the audio
DSP (Digital Signal Processing) module and ground?
Yes
GO to C14.
No
REPAIR the circuit in question. TEST the system for normal operation.
C7 CHECK THE AUDIO SIGNALS TO THE RETM (Rear Entertainment Module)
- Ignition OFF.
- Disconnect: RETM (Rear Entertainment Module) C2949B.
- Operate the audio system in radio tuner (AM/FM), single-play mode (no headphone icon on the ACM (Audio Control Module) display).
- Measure the AC voltage between the RETM (Rear Entertainment Module) C2949B-8, circuit VME59 (YE/OG), harness side and the RETM (Rear Entertainment Module) C2949B-21, circuit RME59 (WH/GN), harness side.
- Measure the AC voltage between the RETM (Rear Entertainment Module) C2949B-22, circuit VME58 (YE/VT), harness side and the RETM (Rear Entertainment Module) C2949B-9, circuit RME58 (BN/BU), harness side.
Is a fluctuating AC voltage present?
Yes
GO to C10.
No
GO to C8.
C8 CHECK THE AUDIO CIRCUITS TO THE RETM (Rear Entertainment Module) FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: ACM (Audio Control Module) C240A.
- Ignition ON.
- Measure the voltage between the RETM (Rear Entertainment Module), harness side and ground as follows:
Positive Meter Lead Negative Meter Lead C2949B-8 VME59 (YE/OG) Ground C2949B-21 RME59 (WH/GN) Ground C2949B-22 VME58 (YE/VT) Ground C2949B-9 RME58 (BN/BU) Ground
Is any voltage present?
Yes
REPAIR the circuit in question. CLEAR any DTCs present. TEST the system for normal operation.
No
GO to C9.
C9 CHECK THE AUDIO CIRCUITS TO THE RETM (Rear Entertainment Module) FOR AN OPEN OR SHORT TO GROUND
- Ignition OFF.
- Measure the resistance between the ACM (Audio Control Module), harness side and the RETM (Rear Entertainment Module), harness side; and between the ACM (Audio Control Module), harness side and ground as follows:
Positive Meter Lead Negative Meter Lead Circuit C240A-10 C2949B-8, then ground VME59 (YE/OG) C240A-23 C2949B-21, then ground RME59 (WH/GN) C240A-9 C2949B-22, then ground VME58 (YE/VT) C240A-22 C2949B-9, then ground RME58 (BN/BU)
Are the resistances less than 5 ohms between the ACM (Audio Control Module) and the RETM (Rear Entertainment Module), and greater than 10,000 ohms between the ACM (Audio Control Module) and ground?
Yes
GO to C12.
No
REPAIR the circuit in question. CLEAR any DTCs present. TEST the system for normal operation.
C10 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) C240B (Subwoofer Concern).
- Disconnect: Audio DSP (Digital Signal Processing) Module C4208A.
- 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 C4208A-7 VME07 (WH) Ground C4208A-17 RME07 (WH/BN) Ground RH front door or RH A-pillar C4208A-9 VME10 (WH/VT) Ground C4208A-19 RME10 (WH/OG) Ground LH rear door or LH D-pillar C4208A-8 VME09 (WH/GN) Ground C4208A-18 RME09 (BN/YE) Ground RH rear door or RH D-pillar C4208A-10 VME12 (BN/WH) Ground C4208A-20 RME12 (BN/BU) Ground Instrument panel C4208A-6 VME51 (BN/BU) Ground C4208A-16 RME51 (WH/BU) Ground Subwoofer C4208A-5 VME22 (VT/GN) Ground C4208A-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 C11.
C11 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) (vehicles without family entertainment system) or RETM (Rear Entertainment Module) (vehicles with family entertainment system), 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 A-pillar C4208A-7 C240A-8, then ground VME07 (WH) C4208A-17 C240A-21, then ground RME07 (WH/BN) RH front door or RH A-pillar C4208A-9 C240A-11, then ground VME10 (WH/VT) C4208A-19 C240A-12, then ground RME10 (WH/OG) LH rear door or LH D-pillar C4208A-8 C240A-9 or C2949B-5, then ground VME09 (WH/GN) C4208A-18 C240A-22 or C2949B-18, then ground RME09 (BN/YE) RH rear door or RH D-pillar C4208A-10 C240A-10 or C2949B-4, then ground VME12 (BN/WH) C4208A-20 C240A-23 or C2949B-17, then ground RME12 (BN/BU) Instrument panel C4208A-6 C240A-5 VME51 (BN/BU) C4208A-16 C240A-6 RME51 (WH/BU) Subwoofer C4208A-5 C240B-1, then ground VME22 (VT/GN) C4208A-15 C240B-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) (or RETM (Rear Entertainment Module)), and greater than 10,000 ohms between the audio DSP (Digital Signal Processing) module and ground?
Yes
If the vehicle is equipped with family entertainment system, GO to C13.
Otherwise, GO to C12.
No
REPAIR the circuit in question. CLEAR any DTCs present. TEST the system for normal operation.
C12 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) . 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.
C13 CHECK FOR CORRECT RETM (Rear Entertainment Module) OPERATION
- Ignition OFF.
- Connect: All Disconnected Connectors.
- Disconnect all the RETM (Rear Entertainment Module) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the RETM (Rear Entertainment 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 RETM (Rear Entertainment Module). REFER to Rear Entertainment Module (RETM) . 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.
C14 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.