Mazda CX-7 2007 Workshop Manual page 1430

SYMPTOM TROUBLESHOOTING [ENTIRE AUDIO SYSTEM]
Quick Diagnostic Chart (Entire Audio System)
Possible factor
Low vehicle battery voltage
Jammed radio signals from after market equipment
Speaker malfunction (e. g., any foreign material, broken)
Improper speaker installation
Poor connection of audio unit connector, terminal damage
Antenna malfunction (e.g., poor ground)
Audio unit malfunction
Audio amplifier malfunction (with Bose)
Burnt fuse (B+)
Burnt fuse (ACC)
Open or short circuit in power supply (B+) wiring harness
Open or short circuit in power supply (ACC) wiring harness
Short circuit in wiring harness between audio unit and speaker (without Bose)
Open circuit in wiring harness between audio unit and speaker (without Bose)
Open or short circuit in wiring harness between audio amplifier and ground (with Bose)
Open or short circuit in wiring harness between audio amplifier and speaker (with Bose)
Open or short circuit in wiring harness between audio amplifier and audio unit (with Bose)
Poor connection of audio amplifier connector, terminal damage (with Bose)
Short circuit inside speaker
Vibration of door trim and/or package trim
CAN signal wiring harness malfunction
Open or short circuit in vehicle speed signal wiring harness (e.g., instrument cluster)
Burnt fuse (TNS signal)
Open or short circuit in TNS signal wiring harness
Center panel malfunction
Information display malfunction
Open or short circuit in Mic unit signal wiring harness
Open or short circuit in Audio Pilot signal wiring harness
09-03D–2
Troubleshooting item
X: Applicable
1 2 3 4 5 6 7
X
X
X X X X
X X
X X X
X
X X X X X X
X X X X X
X
X
X
X
X X
X
X
X X
X X
X X X
X X
X
X
8 9 10
X
X X X
X
X
X
X
X
X
X
X
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