12
Connect the M-MDS to the DLC-2.
Turn the ignition switch to the ON position
(Engine off).
Retrieve any DTCs.
Are there any DTCs displayed?
Yes
DTC is displayed:
Go to appropriate DTC inspection.
(See
DTC TABLE [MZI-3.7]
.)
Communication error message is
displayed:
Inspect for the following:
z
Open circuit in wiring harness
between main relay and PCM
terminal 1 BO or 1BJ
z
Open main relay GND circuit
z
Main relay is stuck open.
z
Open or short circuit in wiring
harness between the DLC-2 and
PCM terminals 1BL or 1BG
z
Open or poor GND circuit (PCM
terminal 1D, 1J, 1BP, 1BK)
z
Poor connection of vehicle body
GND
No
No DTC is displayed:
Go to the next step.
13 Attempt to start engine at part throttle.
Does engine run smoothly at part throttle?
Yes
Inspect electronic throttle control system
operation.
(See
ENGINE CONTROL SYSTEM
OPERATION INSPECTION [MZI-
3.7]
.)
No
Go to the next step.
14
Connect the M-MDS to the DLC-2.
Access RPM PID.
Is RPM PID indicating engine speed
during engine cranking?
Yes
Go to the next step.
No
Inspect for the following:
z
Open or short circuit in CKP sensor
z
Open or short circuit in wiring
harness between CKP sensor
terminal A and PCM terminal 2P
z
Open or short circuit in wiring
harness between CKP sensor
terminal B and PCM terminal 2T
z
Open or short circuit in CKP sensor
wiring harnesses
If CKP sensor and wiring harness are
normal, go to the next step.
Visually inspect CKP sensor and teeth of
2008 Mazda CX-9 Grand Touring
2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:10:05 AM
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