Mazda CX-9 Grand Touring. Manual — part 330

DIAGNOSTIC PROCEDURE

NO.5 ENGINE STALLS-AFTER START/AT IDLE (MZI-3.7) DIAGNOSTIC PROCEDURE

POSSIBLE

CAUSE



Fuel leakage from fuel injector



Fuel injector clogging



Ignition coil malfunction



Improper air/fuel mixture ratio control



Improper valve timing



Improper operation variable valve timing control system



Immobilizer system and/or circuit malfunction



Immobilizer system operating property. (Ignition key is not registered.)



Pressure regulator malfunction (built-in fuel pump unit)

WARNING:

The following troubleshooting flow chart contains the fuel system diagnosis
and repair procedures. Read the following warnings before servicing the fuel
system:



Fuel vapor is hazardous. It can easily ignite, causing serious injury
and damage. Always keep sparks and flames away from fuel.



Fuel line spills and leakage are dangerous. Fuel can ignite and cause
serious injuries or death and damage. Fuel can also irritate skin and
eyes. To prevent this, always complete "BEFORE SERVICE
PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this
manual.

(See BEFORE SERVICE PRECAUTION [MZI-3.7] .)

(See AFTER SERVICE PRECAUTION [MZI-3.7] .)

CAUTION:



Disconnecting/connecting quick release connector without cleaning it
may cause damage to fuel pipe and quick release connector. Always
clean quick release connector joint area before
disconnecting/connecting, and make sure that it is free of foreign
material.

STEP

INSPECTION

RESULTS

ACTION

1

Connect the M-MDS to the DLC-2.
Do the following conditions appear?



The engine is not completely started.



DTC P1260 is displayed.

Yes

Both conditions appear:
Go to Step 3.

No

Either or other condition appears:

Go to the next step.

Yes

Go to the next step.

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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2

Does the engine stall after approx. 2 s
since the engine is started?

No

Immobilizer system is normal.

Go to Step 9.

3

Is coil connector securely connected to
coil?

Yes

Go to the next step.

No

Connect the coil connector securely.

Return to Step 2.

4

Does the security light flush?

Yes

Go to the next step.

No

Inspect and repair or replace the following:



Wiring harnesses and connectors

from keyless control module

terminal 3W and instrument cluster

terminal 1W



Wiring harness and connectors from

keyless control module terminal 3X

and instrument cluster terminal 1X



Instrument cluster

(See INSTRUMENT CLUSTER

INSPECTION .)

5

Connect the M-MDS to the DLC-2 and
retrieve DTC for PCM, instrument cluster
and keyless control module (with advanced
keyless entry system).
Are any of the following DTCs displayed?
DTC
PCM: B1342, U0073, U0155
Instrument cluster: B1213, B1600,
B1601, B1602, B1681, B2103, 2139,
B2431, U0110, U0214
Keyless control module (with advanced
keyless entry system): B1681, B2103,
B1213

Yes

Go to the appropriate DTC inspection.
(See DTC TABLE [MZI-3.7] .)

No

Go to the next step.

6

Inspect for the following wiring harnesses
and connectors:
With advanced keyless entry system:



Between coil terminal A and keyless
control module terminal 3V



Between coil terminal B and keyless
control module terminal 3U

Without advanced keyless entry system:

Yes

Repair or replace the suspected wiring
harness and connector.

Go to the next step, (with advanced

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

Page 27

© 2005 Mitchell Repair Information Company, LLC.



Between coil terminal A and
instrument cluster terminal 1G



Between coil terminal B and
instrument cluster terminal 1E

Is there any malfunction?

No

keyless entry system.)

Go to Step 8. (without advanced keyless

entry system.)

7

Inspect the following wiring harnesses and
connectors for an open or short circuit:



Between keyless control module
terminal 3W and instrument cluster
terminal 1W



Between keyless control module
terminal 3X and instrument cluster
terminal 1X

Is there any malfunction?

Yes

Repair or replace wiring harness and
connectors.

No

Go to the next step.

8

Inspect for the following wiring harnesses
and connectors:



Between PCM terminal 1BG and
instrument cluster terminal 1W



Between PCM terminal 1BL and
instrument cluster terminal 1X

Is there any malfunction?

Yes

Repair or replace the suspected wiring
harness and connector.

No

Go to the next step.

9

Verify the following:



Vacuum connection



Air cleaner element



No air leakage from intake-air
system



No restriction of intake-air system



Proper sealing of intake manifold
and components attached to intake
manifold



Ignition wiring



Fuel quality: proper octane,
contamination, winter/summer blend



Electrical connections

Yes

Go to the next step.

No

Service if necessary.

Repeat Step 9.

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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© 2005 Mitchell Repair Information Company, LLC.



Smooth operation of throttle valve

Are all items normal?

10

Connect the M-MDS to the DLC-2.
Access the APP1 and APP2, APP3 PIDs.
Crank the engine with accelerator pedal
released.
Are the APP1 and APP2, APP3 PIDs
indicating that the accelerator pedal is in
the released position?

Yes

Go to the next step.

No

Inspect for the following:



APP sensor



Wiring harnesses and connectors for

following:



PCM terminal 1AC-APP

sensor terminal B



PCM terminal 1 AH-APP

sensor terminal C



PCM terminal 1Y-APP sensor

terminal D



PCM terminal 1AK-APP

sensor terminal E



PCM terminal 1BA-APP

sensor terminal F



PCM terminal 1 AD-APP

sensor terminal G



PCM terminal 1AG-APP

sensor terminal H

11

Connect the M-MDS to the DLC-2.
Access the TP1, TP2 PID. Crank the
engine with accelerator pedal released.
Are the TP1, TP2 PID indicates the closed
throttle position?

Yes

Go to the next step.

No

Inspect for the following:



TP sensor



Wiring harnesses and connectors for

following:



PCM terminal 2BO-TP sensor

terminal A



PCM terminal 2BR-TP sensor

terminal B



PCM terminal 2AD-TP sensor

terminal C



PCM terminal 2D-TP sensor

terminal D



PCM terminal 2AH-TP sensor

terminal E



PCM terminal 2Z-TP sensor

terminal F

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

Page 29

© 2005 Mitchell Repair Information Company, LLC.