Mazda CX-7 2007 Workshop Manual page 1343

ON-BOARD DIAGNOSTIC [MULTIPLEX COMMUNICATION SYSTEM]
STEP INSPECTION
3 INSPECT CAN SYSTEM-RELATED DTC
• Are any of the following DTCs displayed?
— PCM: U0073, U0101, U0121, U0155
— TCM: U0073, U0100, U0121, U0140,
U415
— DSC HU/CM: U0073, U0100, U0101,
U0114, U0140, U1900, U2023
— AWD control module: U0073, U0100,
U0101, U0121, U0155
— BCM: U0073
— SAS control module: U0073, U0155
— Keyless control module: U0073, U0100,
U0140, U0323, U2023
— Instrument cluster: U0073, U0100,
U0101, U0114, U0166, U0121, U0140,
U0151, U0214, U2516
— Climate control unit: U0155, U0516
— Audio unit: 16:Er12
— Information display: U0166, U0181,
U0184, U2516
4 VERIFY TROUBLESHOOTING COMPLETED
• Clear the DTC from the CAN system-related
modules using the M-MDS.
• Start the engine.
• Are any of the CAN related DTCs displayed?
5 INSPECT COMMUNICATION CONDITION
• Is there a response from the following
modules?
— 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
6 INSPECT MODULES THAT DO NOT
RESPOND
• Inspect the power supply and the ground
circuit for any units that do not respond.
• Are they normal?
Yes Repair the malfunctioning part by following the DTC
inspection.
Go to the next step.
No Troubleshooting completed.
Yes Go back to Step 3.
No Troubleshooting completed.
Yes Troubleshooting completed.
No Go to the next step.
Yes Go to the next step.
No Repair the malfunctioning part, then go back to Step 1.
ACTION
09-02D–3
09-02D