Diagnostic procedure

When performing an asterisked (*) troubleshooting inspection, slightly shake the wiring harness and connectors while performing the inspection to discover whether poor contact points are the cause of any intermittent malfunction. If there is a problem, verify that the connectors, terminals and wiring harness are connected correctly and undamaged.

STEP	INSPECTION		ACTION
1	Verify if the customer's cellular phone is a Hands-free telephone system-enabled model by referring to following URL. http://www.mazdausa.com/MusaWeb/displayPage.action?pageParameter=bluetoothHandsFreeSystem Is the customer's cellular phone a Hands-free telephone system-enabled model?	Yes	Go to the next step.
1		No	Explain to the customer that the customer's cellular phone is not a Hands-free telephone system-enabled model.
2	Verify the volume setting of the Hands-free telephone system. Is the volume set at a low level or zero?	Yes	Verify if the malfunction symptom is eliminated after the volume is set to a higher level. If the malfunction is not resolved, go to the next step. If the malfunction is resolved, explain to the customer that the malfunction occurred due to an inappropriate volume setting
2		No	Go to the next step.
3	Is the audio system sound output normal?	Yes	Go to the next step.
3	Is the audio system sound output normal?	No	Perform the audio system troubleshooting procedure.
4	Can the audio volume be controlled using steering switch?	Yes	Go to the next step.
4	Can the audio volume be controlled using steering switch?	No	Inspect and repair the steering switch and related wiring harness.
5	Perform the Bluetooth system (hands-free telephone (HF/TEL) system) DTC inspection. Is U0498:68/26:Er81 displayed?	Yes	Inspect and repair the audio system CAN communication.
5		No	Go to the next step.
6*	Inspect for open or short circuits in the following wiring harnesses and connectors, and inspect the connector connections. Between Bluetooth unit (28-pin) terminal M and audio unit (24-pin) terminal 2E Between Bluetooth unit (28-pin) terminal N and audio unit (24-pin) terminal 2C Are the harnesses and connector connections normal?	Yes	Go to the next step.
6*		No	Repair or replace malfunctioning parts.
7	Make a call with the cellular phone without using Bluetooth system. Does the same symptom appear?	Yes	Cellular phone related problem.
7		No	Go to the next step.
8	Call the hands-free cell phone using another cellular phone. Does the same symptom appear?	Yes	Replace the Bluetooth unit. (See BLUETOOTH UNIT REMOVAL/INSTALLATION .)
8		No	The cellular phone Bluetooth system is malfunctioning.