Mazda CX-7 2007 Workshop Manual page 1344

ON-BOARD DIAGNOSTIC [MULTIPLEX COMMUNICATION SYSTEM]
STEP
7 INSPECT CONNECTOR AND WIRING
HARNESS BETWEEN MODULES THAT DO
NOT RESPOND AND DLC-2
• Turn the ignition switch to the LOCK position.
• Inspect the wiring harness and connector
between any module that does not respond
and the DLC-2.
PCM— DLC-2
• 1AM— F
• 1AI— E
TCM— DLC-2
• A14— F
• A6— E
DSC HU/CM— DLC-2
• X— F
• W— E
AWD control module— DLC-2
• G— F
• H— E
BCM— DLC-2
• 3X, 5L— F
• 3W, 5I— E
SAS control module— DLC-2
• 2E— F
• 2F— E
Keyless control module— DLC-2
• 3X— F
• 3W— E
Instrument cluster— DLC-2
• 2R— F
• 2T— E
• 2V— L
• 2X— K
Audio amplifier— DLC-2
• 2O— L
• 2P— K
Climate control unit— DLC-2
• B— L
• A— K
Audio unit— DLC-2
• 1O— L
• 1Q— K
Car-navigation unit— DLC-2
• 1O— L
• 1Q— K
Information display— DLC-2
• J— L
• I— K
• Is there any malfunction?
8 INSPECT WIRING HARNESS
• Turn the ignition switch to the ON position
(Engine off).
• Measure the voltage between the following
terminals.
— DLC-2 terminals F and GND
— DLC-2 terminals E and GND
— DLC-2 terminals L and GND
— DLC-2 terminals K and GND
• Is the voltage 2.0— 3.0 V?
9 INSPECT WIRING HARNESS
• Turn the ignition switch to the LOCK position.
• Measure the resistance between the
following terminals.
— DLC-2 terminals F and E
— DLC-2 terminals L and K
• Is the resistance 59— 65 ohms?
09-02D–4
INSPECTION
Yes Repair the malfunctioning part, then go back to Step 1.
No Go to the next step.
Yes Go to the next step.
No Go to Step 13.
Yes Replace the modules that do not respond, then go back to
Step 1.
No Go to the next step.
ACTION