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 AUX AUDIO SOUND OUTPUT [ENTERTAINMENT SYSTEM [WITHOUT CENTER DISPLAY]]

Description	NO AUX AUDIO SOUND OUTPUT
Description	Radio, CD, USB audio, Bluetooth^® audio is produced, but no AUX audio
Possible Causes	External device malfunction Connector poor contact or terminal damage Open circuit in wiring harness between the following terminals: Audio unit terminal 2L and auxiliary jack/USB port terminal E Audio unit terminal 2K and auxiliary jack/USB port terminal D Audio unit terminal 2J and auxiliary jack/USB port terminal C Audio unit terminal 2I and auxiliary jack/USB port terminal B Auxiliary jack/USB port terminal A and body ground Short to ground in wiring harness between the following terminals: Audio unit terminal 2L and auxiliary jack/USB port terminal E Audio unit terminal 2K and auxiliary jack/USB port terminal D Audio unit terminal 2J and auxiliary jack/USB port terminal C Audio unit terminal 2I and auxiliary jack/USB port terminal B Short to power supply in wiring harness between the following terminals: Audio unit terminal 2L and auxiliary jack/USB port terminal E Audio unit terminal 2K and auxiliary jack/USB port terminal D Audio unit terminal 2J and auxiliary jack/USB port terminal C Audio unit terminal 2I and auxiliary jack/USB port terminal B Auxiliary jack/USB port malfunction Audio unit malfunction
System Wiring Diagram

Diagnostic Procedure

Step	Inspection		Action
1	DETERMINE IF MALFUNCTION CAUSE IS EXTERNAL DEVICE After obtaining the customer's consent, replace with an external media that was not used when the malfunction occurred. Switch the ignition to ACC or ON (engine off or on). Is sound from the AUX audio output?	Yes	System is normal. (Explain to the customer that the external device or internal data has a malfunction)
		No	Go to the next step.
2	AUXILIARY JACK/USB PORT CONNECTOR INSPECTION Switch the ignition off. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) Disconnect the connector of the auxiliary jack/USB port. 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 8.
3	INSPECT AUDIO UNIT CONNECTOR 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	Go to the next step.
		No	Repair or replace the connector, then go to Step 8.
4	VERIFY IF MALFUNCTION CAUSE IS OPEN CIRCUIT IN WIRING HARNESS BETWEEN AUDIO UNIT AND AUXILIARY JACK/USB PORT Verify that the audio unit and the auxiliary jack/USB port connectors are disconnected. Inspect the wiring harness for continuity between the following terminals (vehicle wiring harness side). Audio unit terminal 2L and auxiliary jack/USB port terminal E Audio unit terminal 2K and auxiliary jack/USB port terminal D Audio unit terminal 2J and auxiliary jack/USB port terminal C Audio unit terminal 2I and auxiliary jack/USB port terminal B Auxiliary jack/USB port terminal A and body ground 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 2L and auxiliary jack/USB port terminal E Audio unit terminal 2K and auxiliary jack/USB port terminal D Audio unit terminal 2J and auxiliary jack/USB port terminal C Audio unit terminal 2I and auxiliary jack/USB port terminal B Auxiliary jack/USB port terminal A and body ground 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 8.
5	VERIFY IF MALFUNCTION CAUSE IS SHORT CIRCUIT TO GROUND IN WIRING HARNESS BETWEEN AUDIO UNIT AND AUXILIARY JACK/USB PORT Verify that the audio unit and the auxiliary jack/USB port connectors are disconnected. Inspect for continuity between the following wiring harness terminals (vehicle wiring harness side) and body ground. Auxiliary jack/USB port terminal E Auxiliary jack/USB port terminal D Auxiliary jack/USB port terminal C Auxiliary jack/USB port 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 2L and auxiliary jack/USB port terminal E Audio unit terminal 2K and auxiliary jack/USB port terminal D Audio unit terminal 2J and auxiliary jack/USB port terminal C Audio unit terminal 2I and auxiliary jack/USB port 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 Step 8.
		No	Go to the next step.
6	VERIFY IF MALFUNCTION CAUSE IS SHORT CIRCUIT TO POWER SUPPLY IN WIRING HARNESS BETWEEN AUDIO UNIT AND AUXILIARY JACK/USB PORT Verify that the audio unit and the auxiliary jack/USB port connectors are disconnected. Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) Switch the ignition to ACC or ON (engine off or on). Measure the voltage at the following terminals (vehicle wiring harness side). Auxiliary jack/USB port terminal E Auxiliary jack/USB port terminal D Auxiliary jack/USB port terminal C Auxiliary jack/USB port terminal B Is the voltage B+?	Yes	Refer to the wiring diagram and verify if there is a common connector between the following terminals. Audio unit terminal 2L and auxiliary jack/USB port terminal E Audio unit terminal 2K and auxiliary jack/USB port terminal D Audio unit terminal 2J and auxiliary jack/USB port terminal C Audio unit terminal 2I and auxiliary jack/USB port 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 power supply 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 the power supply. Go to Step 8.
		No	Go to the next step.
7	AUXILIARY JACK/USB PORT INSPECTION Inspect the auxiliary jack/USB port. (See AUXILIARY JACK/USB PORT INSPECTION.) Is the auxiliary jack/USB port normal?	Yes	Replace the audio unit, then go to the next step. (See AUDIO UNIT REMOVAL/INSTALLATION.)
		No	Replace the auxiliary jack/USB port, then go to the next step. (See AUXILIARY JACK/USB PORT REMOVAL/INSTALLATION.)
8	VERIFY IF MALFUNCTION CAUSE IS CORRECTED Switch the ignition off. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) Connect all the connectors. Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) Insert the external device when the malfunction occurred. Switch the ignition to ACC or ON (engine off or on). Is sound from the AUX audio output?	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.