Mazda CX-7 2007 Workshop Manual page 1342

ON-BOARD DIAGNOSTIC [MULTIPLEX COMMUNICATION SYSTEM]
MULTIPLEX COMMUNICATION SYSTEM[MULTIPLEX COMMUNICATION SYSTEM]
Outline
• If the controller area network (CAN) system is malfunctioning, read the DTCs of the following modules, using
the M-MDS to determine the malfunctioning system.
— PCM
— TCM
— DSC HU/CM
— AWD control module
— BCM
— SAS control module
— Keyless control module
— Instrument cluster
— Audio amplifier
— Climate control unit
— Audio unit (base module)
— Car-navigation unit
— Information display
Flowchart
• Use the following flowchart to verify the cause of the trouble.
STEP
1 INSPECT DTC INDICATION
• Using the M-MDS, inspect if DTCs are
displayed for the following module:
— PCM
— TCM
— DSC HU/CM
— AWD control module
— BCM
— SAS control module
— Keyless control module
— Instrument cluster
— Audio amplifier
— Climate control unit
— Audio unit (base module)
— Car-navigation unit
— Information display
• Are any DTCs displayed?
2 INSPECT CAN SYSTEM-RELATED DTC
• Are any DTCs other than the following
displayed?
— U0073
— U0100
— U0101
— U0114
— U0121
— U0140
— U0151
— U0155
— U0164
— U0166
— U0181
— U0184
— U0214
— U0323
— U0415
— U0516
— U1900
— U2023
— U2516
— 16:Er12
09-02D–2
INSPECTION
Yes Go to the next step.
No Go to Step 5.
Yes Repair the malfunctioning part by following the related DTC
inspection.
Go to the next step.
No Go to the next step.
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