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*	Can the audio volume be controlled using steering switch?	Yes	Go to the next step.
2*	Can the audio volume be controlled using steering switch?	No	Inspect and repair the steering switch and related wiring harness.
3	Does the symptom appear under following conditions? Windows and/or sunroof are open Noise while driving is loud (engine, tire noise, blower fan noise)	Yes	The system is normal. (Influence due to vehicle driving conditions)
3		No	Go to the next step.
4	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.
4		No	Go to the next step.
5*	Inspect for open or short circuits in the following wiring harnesses and connectors, and inspect the connector connections. Between microphone terminal A and Bluetooth unit terminal A Between microphone terminal B and Bluetooth unit terminal B Between microphone terminal C and Bluetooth unit terminal C Between microphone terminal E and Bluetooth unit terminal E Are the harnesses and connector connections normal?	Yes	Go to the next step.
5*		No	Repair or replace malfunctioning parts.
6	Inspect the following switches. (See STEERING SWITCH INSPECTION .) Hang-up button Pick-up button Talk button Are the buttons normal?	Yes	Go to the next step.
6		No	Replace the steering switch. (See STEERING SWITCH REMOVAL/INSTALLATION .)
7*	Inspect for open or short circuits in the following wiring harnesses and connectors, and inspect the connector connections. Between audio unit (24-pin) terminal 1P and clock spring terminal 4I (part wiring harness-side) Are the harnesses and connector connections normal?	Yes	Go to the next step.
7*		No	Repair or replace malfunctioning parts.
8	Make a call with the cellular phone without using Bluetooth system. Does the same symptom appear?	Yes	Cellular phone related problem.
8		No	Go to the next step.
9	Call the hands-free cell phone using another cellular phone. Does the same symptom appear?	Yes	Go to the next step.
9		No	The cellular phone Bluetooth system is malfunctioning.
10	Replace the microphone. (See MICROPHONE REMOVAL/INSTALLATION .) Does the same symptom appear?	Yes	Replace the Bluetooth unit. (See BLUETOOTH UNIT REMOVAL/INSTALLATION .)
10		No	Troubleshooting is completed. (The microphone is malfunctioning.)