Mazda CX-7 2007 Workshop Manual page 1345

ON-BOARD DIAGNOSTIC [MULTIPLEX COMMUNICATION SYSTEM]
STEP INSPECTION
10 INSPECT PCM
• Disconnect the PCM connector.
• Measure the resistance between following
terminals.
— PCM terminals 1AM and 1AI (part-side)
• Is the resistance 118— 130 ohms?
11 INSPECT INSTRUMENT CLUSTER
• Disconnect the instrument cluster connector.
• Measure the resistance between the
following terminals.
— Instrument cluster terminals 2R and 2T
(part-side)
— Instrument cluster terminals 2V and 2X
(part-side)
• Is the resistance 118— 130 ohms?
12 INSPECT INFORMATION DISPLAY
• Disconnect the information display
connector.
• Measure the resistance between the
following terminals.
— Information display terminal J and I (part-
side)
• Is the resistance 118— 130 ohms?
13 CLASSIFY WIRING HARNESS
MALFUNCTION OR MODULE MALFUNCTION
• Turn the ignition switch to the LOCK position.
• Disconnect the connector of any unit that
does not respond. (If there are two or more
units that do not respond, disconnect only
one of the units.)
• Turn the ignition switch to the ON position.
• 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 voltage 2.0— 3.0 V?
Yes Go to the next step.
No Replace the PCM, then go to the next step.
Yes Go to next step.
No Replace the instrument cluster, then go to the next step.
Yes Go to next step.
No Replace the BCM, then go to the next step.
Yes Go to the next step.
No Retry this step with other module connector disconnected.
If all units that do not respond are disconnected, go to Step
15.
ACTION
09-02D–5
09-02D