Mazda CX-7 2007 Workshop Manual page 1431

SYMPTOM TROUBLESHOOTING [ENTIRE AUDIO SYSTEM]
CONFIRMATION STEP 1: AUDIO PANEL SWITCH CONFIRMATION[ENTIRE AUDIO SYSTEM]
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• Verify the customer complaint and identify either the center panel malfunction or audio unit malfunction.
How to activate audio panel switch confirmation mode
1. Turn the audio system to ON.
2. Press both POWER SW and MEDIA buttons for a second at the same time.
3. The audio panel switch confirmation mode is now activated.
STEP
• Press each button on the center panel.
1
• Does buzzer sound when pressing each
button?
• Disassemble and reassemble the center
2
panel and audio unit.
• Activate the audio panel switch confirmation
mode.
• Does buzzer sound when pressing each
button?
• Does the audio system operate properly?
3
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CONFIRMATION STEP 2: AUDIO CONTROL SWITCH CONFIRMATION[ENTIRE AUDIO SYSTEM]
• Verify the customer complaint and identify either the audio control switch malfunction or audio unit malfunction.
STEP
• Is the symptom related to either the audio
1
control switch or audio panel operation?
• Disconnect the audio unit connector (24-pin).
2
• Inspect both the audio unit and wiring
harness-side connectors for poor
connection. (such as damaged/pulled-out
pins, corrosion).
— Terminal N (ST SW1)
— Terminal P (ST SW2)
• Are all the pins normal?
• Inspect the continuity between the audio unit
3
wiring harness-side connector terminal N
and P while operating the audio control
switch.
• Does the resistance change?
• Turn the ignition switch to the LOCK position.
4
• Remove the audio control switch.
• Inspect the continuity between the audio unit
wiring harness-side connector (24-pin)
terminal and the audio control switch wiring
harness-side connector (8-pin) terminal.
— Terminal N (24-pin) — Terminal G (8-pin)
— Terminal P (24-pin) — Terminal H (8-pin)
• Is there the continuity?
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INSPECTION
INSPECTION
Yes Verify the customer complaint and then go to the
appropriate symptom troubleshooting procedure.
No Go to the next step.
Yes Go to the next step.
No Replace the center panel.
Yes The system is normal.
No Verify the customer complaint and then go to the
appropriate symptom troubleshooting procedure.
Yes Verify the customer complaint and then go to the
appropriate symptom troubleshooting procedure.
No The symptom is related to the audio panel
operation:
• Follow the "Confirmation Step 1".
The symptom is related to the audio control
switch operation:
• Go to the next step.
Yes Go to the next step.
No If the audio unit side connector is wrong:
• Replace the audio unit.
If the wiring harness-side connector is wrong:
• Repair or replace the pins and/or the connector.
Yes Verify the customer complaint and then go to the
appropriate symptom troubleshooting procedure.
No Go to the next step.
Yes Replace the audio control switch.
No Repair or replace the suspect wiring harness.
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