Mazda CX-9 Grand Touring. Manual - part 332

 

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Mazda CX-9 Grand Touring. Manual - part 332

 

 

DIAGNOSTIC PROCEDURE 

NO.6 CRANKS NORMALLY BUT WILL NOT START (MZI-3.7) DIAGNOSTIC PROCEDURE 

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 any of the following conditions 
appear? 

Engine does not completely start.  

DTC P1260 is displayed.  

Yes

Both conditions appear:  
Go to Step 3.

No

Either or other condition appears:  

Go to the next step.

2

Does engine stall after approx. 2 s from 
when it is started?

Yes

Go to the next step.

No

Immobilizer system is normal. 

Go to Step 9.

3

Is the coil connector securely connected 
to the coil?

Yes

Go to the next step.

No

Connect the coil connector securely. 

Return to Step 2.

Yes

Go to the next step.

Inspect and repair or replace the following:

 

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 34 

© 2005 Mitchell Repair Information Company, LLC. 

4

Does the security light flush?

No

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 the 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, B2139, 
B2431, U0100, 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 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:

Between coil terminal A and 
instrument cluster terminal 1G  

Between coil terminal B and 
instrument cluster terminal 1E  

 

Yes

Repair or replace the suspected wiring 
harness and connector.

No

Go to the next step, (with advanced keyless 

entry system.) 

Go to Step 8. (without advanced keyless 

entry system.)

 

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 35 

© 2005 Mitchell Repair Information Company, LLC. 

Is there any malfunction?

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 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  

External fuel shut off or accessory 
(such as kill switch, alarm)  

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

No air leakage from intake-air 
system  

Intake-air system restriction (such 
as air cleaner element, fresh air 
duct)  

Proper sealing of intake manifold 
and components attached to intake 
manifold  

Ignition wiring  

Electrical connections  

Fuses  

Smooth operation of throttle valve 

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

Page 36 

© 2005 Mitchell Repair Information Company, LLC. 

 
Are all items normal?

10

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 the appropriate DTC inspection. 

(See DTC TABLE [MZI-3.7] .) 

 
Communication error message is 
displayed:
  
Inspect for the following: 

Open circuit in wiring harness between 
main relay and PCM terminal 1 BO or 
1BJ  

Open main relay GND circuit  

Open or short circuit in wiring harness 
between the DLC-2 and PCM terminal 
1BL or 1BG  

Main relay is stuck open.  

Open or poor GND circuit (PCM 
terminal 1D, 1J, 1BP, 1BK)  

Poor connection of vehicle body GND 

No

No DTC is displayed:  

Go to the next step.

11

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 1 AC-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  

 

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 37 

© 2005 Mitchell Repair Information Company, LLC. 

 

 

 

 

 

 

 

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