Manual pages - MX5 Manual | Mazda MX5 (Mk4) 2015+

Knowledge Base

Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5

< Previous Next >

NO SOUND OUTPUT IN ALL MODES [ENTERTAINMENT SYSTEM [WITHOUT CENTER DISPLAY]]

Description	NO SOUND OUTPUT IN ALL MODES
Description	Sound is not output from speakers even if any mode is selected
Possible Causes	Connector poor contact or terminal damage Speaker malfunction Malfunction in each speaker Open circuit in wiring harness between the following terminals: Audio unit terminal 1A and door speaker (LH) terminal C Audio unit terminal 1A and tweeter (LH) terminal B Audio unit terminal 1C and door speaker (LH) terminal B Audio unit terminal 1C and tweeter (LH) terminal A Audio unit terminal 1D and door speaker (RH) terminal C Audio unit terminal 1D and tweeter (RH) terminal B Audio unit terminal 1F and door speaker (RH) terminal B Audio unit terminal 1F and tweeter (RH) terminal A Short to ground in wiring harness between the following terminals: Audio unit terminal 1A and door speaker (LH) terminal C Audio unit terminal 1A and tweeter (LH) terminal B Audio unit terminal 1D and door speaker (RH) terminal C Audio unit terminal 1D and tweeter (RH) terminal B Audio unit malfunction
System Wiring Diagram

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY MALFUNCTION SYMPTOM The ignition is switched to ACC or ON (engine off or on). Launch the “Speaker Inspection” of the on-board diagnostic assist function. (See DIAGNOSTIC ASSIST FUNCTION [AUDIO UNIT].) Is sound output from each speaker?	Yes	System is normal. Due to the possibility that sound is not output in some modes, verify the malfunction in the symptom troubleshooting chart and perform the other applicable malfunction diagnosis. (See SYMPTOM TROUBLESHOOTING [ENTERTAINMENT SYSTEM [WITHOUT CENTER DISPLAY]].)
		No	No sound is produced from all speakers Go to the next step. No sound is produced from some speakers Go to Step 3.
2	INSPECT AUDIO UNIT CONNECTOR Switch the ignition off. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) Disconnect the audio unit connector. Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. Is the connector normal?	Yes	Replace the audio unit, then go to Step 7. (See AUDIO UNIT REMOVAL/INSTALLATION.)
		No	Repair or replace the connector, then go to Step 7.
3	INSPECT SPEAKER AND TWEETER CONNECTIONS Switch the ignition off. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) Disconnect the connector of the speaker or tweeter which is malfunctioning. Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. Is the connector normal?	Yes	Go to the next step.
		No	Repair or replace the connector, then go to Step 7.
4	SPEAKER OR TWEETER INSPECTION Inspect the malfunctioning speaker or tweeter. (See DOOR SPEAKER INSPECTION.) (See TWEETER INSPECTION.) Is the speaker or tweeter resistance normal?	Yes	Go to the next step.
		No	Replace the malfunctioning speaker or tweeter, then go to Step 7. (See DOOR SPEAKER REMOVAL/INSTALLATION.) (See TWEETER REMOVAL/INSTALLATION.)
5	INSPECT SPEAKER CIRCUIT FOR OPEN CIRCUIT Disconnect the malfunctioning speaker or tweeter and the audio unit connector. Verify the continuity of the wiring harness between the following terminals (vehicle wiring harness side) of the speaker or tweeter which are malfunctioning. Audio unit terminal 1A and door speaker (LH) terminal C Audio unit terminal 1A and tweeter (LH) terminal B Audio unit terminal 1C and door speaker (LH) terminal B Audio unit terminal 1C and tweeter (LH) terminal A Audio unit terminal 1D and door speaker (RH) terminal C Audio unit terminal 1D and tweeter (RH) terminal B Audio unit terminal 1F and door speaker (RH) terminal B Audio unit terminal 1F and tweeter (RH) terminal A Is there continuity?	Yes	Go to the next step.
		No	Refer to the wiring diagram and verify if there is a common connector between the following terminals. Audio unit terminal 1A and door speaker (LH) terminal C Audio unit terminal 1A and tweeter (LH) terminal B Audio unit terminal 1C and door speaker (LH) terminal B Audio unit terminal 1C and tweeter (LH) terminal A Audio unit terminal 1D and door speaker (RH) terminal C Audio unit terminal 1D and tweeter (RH) terminal B Audio unit terminal 1F and door speaker (RH) terminal B Audio unit terminal 1F and tweeter (RH) terminal A If there is a common connector: Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location. Repair or replace the malfunctioning location. If there is no common connector: Repair or replace the wiring harness which has an open circuit. Go to Step 7.
6	INSPECT SPEAKER CIRCUIT FOR SHORT TO GROUND Verify that the connector of the malfunctioning speaker or tweeter and the audio unit connector are disconnected. Inspect for continuity between the following terminals (vehicle wiring harness side) of the speaker or tweeter which are malfunctioning and body ground. Door speaker (LH) terminal C Door speaker (RH) terminal C Tweeter (LH) terminal B Tweeter (RH) terminal B Is there continuity?	Yes	Refer to the wiring diagram and verify if there is a common connector between the following terminals. Audio unit terminal 1A and door speaker (LH) terminal C Audio unit terminal 1A and tweeter (LH) terminal B Audio unit terminal 1D and door speaker (RH) terminal C Audio unit terminal 1D and tweeter (RH) terminal B If there is a common connector: Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location. Repair or replace the malfunctioning location. If there is no common connector: Repair or replace the wiring harness which is shorted to ground. Go to the next step.
		No	Replace the audio unit, then go to the next step. (See AUDIO UNIT REMOVAL/INSTALLATION.)
7	VERIFY IF MALFUNCTION CAUSE IS CORRECTED Connect all the connectors. Switch the ignition to ACC or ON (engine off or on). Launch the “Speaker Inspection” of the on-board diagnostic assist function. (See DIAGNOSTIC ASSIST FUNCTION [AUDIO UNIT].) Is sound output from each speaker?	Yes	Troubleshooting completed. (explain the contents of the servicing to the customer)
		No	Verify the malfunction symptom in the symptom troubleshooting chart and perform the other applicable malfunction diagnosis. (See SYMPTOM TROUBLESHOOTING [ENTERTAINMENT SYSTEM [WITHOUT CENTER DISPLAY]].)

< Previous Next >

This fan site is not affiliated with Mazda, and is intended for personal, or commercial use only. The content of our web pages is for general information purposes only and is presented “as is”. We give no assurance or warranty regarding the accuracy of the contents. Readers should do their due diligence and seek the advice of an appropriately certified automotive technician before attempting any steps on this site. Original content provided by Mazda North America. The content of the manual is copyright under DMCA to: full.metal.resistor@gmail.com

We accept no responsibility for errors, inaccuracies, or omissions found on these pages. Additionally, we hereby exclude liability for any demands, claims, damages or losses of any kind with regard to any content or information provided on our web-site, including but not limited to incidental or consequential damages, direct or indirect loss, compensatory damages, loss of profits, or otherwise. By using this manual you assume full liablity for any procedures carried out on your vehicle, and are responsible for the vehicle remaining road legal and safe.