Mazda CX-9 Grand Touring. Manual - part 230

 

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Mazda CX-9 Grand Touring. Manual - part 230

 

 

2

AVAILABILITY  

Verify related Service 
Bulletins and/or on-line repair 
information availability.  

Is any related Service Bulletins 
available?  

Yes

Service Bulletins. 

If the vehicle is not repaired, go to the next step.  

No

Go to the next step.

3

INSPECT MAF SENSOR 
CONNECTOR FOR POOR 
CONNECTION
  

Turn the ignition switch off.  

Disconnect the MAF/IAT 
sensor connector.  

Inspect for poor connection 
(such as damaged/pulled-out 
pins, corrosion).  

Are there any malfunction?  

Yes Repair or replace suspected part, then go to Step 10.

No

Go to the next step.

4

INSPECT POWER SUPPLY 
CIRCUIT FOR OPEN CIRCUIT
 

Turn the ignition switch to the 
ON position (Engine off).  

Measure the voltage between 
MAF sensor terminal A and 
body ground.  

Is the voltage B+?  

Yes Go to the next step.

No

Repair or replace suspected part, then go to Step 10.

5

INSPECT PCM CONNECTOR 
FOR POOR CONNECTION
  

Turn the ignition switch off.  

Disconnect PCM connector.  

Inspect for poor connection 
(such as damaged/pulled-out 
pins, corrosion).  

Are there any malfunction?  

Yes Repair or replace suspected part, then go to Step 10.

No

Go to the next step.

INSPECT MAF SENSOR 
SIGNAL CIRCUIT FOR OPEN 
CIRCUIT
  

Remove PCM with PCM 
connector connected.  

Inspect for continuity between 
the following circuits: 

Yes Go to the next step.

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:08:34 AM

Page 53 

© 2005 Mitchell Repair Information Company, LLC. 

6

MAF sensor terminal C 
(wiring harness-side) 
and PCM terminal 1AJ 
(wiring harness-side)  

MAF sensor terminal D 
(wiring harness-side) 
and PCM terminal 1AN 
(wiring harness-side)  

Are there continuity?  

No

Repair or replace suspected part, then go to Step 10.

7

INSPECT MAF SENSOR 
SIGNAL CIRCUIT FOR SHORT 
TO GROUND
  

Turn the ignition switch off.  

Disconnect the MAF/IAT 
sensor and PCM connector.  

Inspect continuity between 
following circuits: 

MAF sensor connector 
terminal D and body 
ground  

Are there continuity?  

Yes Repair or replace suspected part, then go to the Step 10.

No

Go to the next step.

8

INSPECT MAF SENSOR 
GROUND CIRCUIT FOR OPEN 
CIRCUIT
  

Inspect continuity between 
MAF sensor terminal B and 
body ground.  

Are there continuity?  

Yes Go to the next step.

No

Repair or replace suspected part, then go to Step 10.

9

INSPECT THE MAF SENSOR  

Inspect the MAF sensor 

(See MASS AIR FLOW 
(MAF) SENSOR 
INSPECTION [MZI-3.7]
 .) 

Are there any malfunction?  

Yes

Replace the MAF/IAT sensor, then go to the next step. 
(See MASS AIR FLOW (MAF)/INTAKE AIR 
TEMPERATURE (IAT) SENSOR 
REMOVAL/INSTALLATION [MZI-3.7]
 .)

No

Go to the next step.

VERIFY TROUBLESHOOTING 
OF DTC P0102 HAS BEEN 
COMPLETED
  

Verify that all disconnected 

Yes

Replace PCM, then go to the next step. (See PCM 
REMOVAL/INSTALLATION [MZI-3.7]
 .)

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:08:34 AM

Page 54 

© 2005 Mitchell Repair Information Company, LLC. 

DTC P0103 [MZI-3.7] 

DTC P0103 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES 

10

connectors reconnected.  

Turn the ignition switch to the 
ON position (Engine off).  

Clear the DTC from the PCM 
memory using the M-MDS.  

Start engine and warm it up 
completely.  

Is same DTC present?  

No

Go to the next step.

11

VERIFY AFTER REPAIR 
PROCEDURE
  

Perform "AFTER REPAIR 
PROCEDURE". 

(See AFTER REPAIR 
PROCEDURE [MZI-3.7]
.) 

Are any DTC present?  

Yes

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

No

Troubleshooting completed.

DTC P0103

MAF circuit high input

DETECTION 

CONDITION 

The MAF sensor circuit is monitored by the PCM for high air flow (or voltage) input
through the CCM. If during KOEO, or KOER, the air flow (or voltage) changes 
above a maximum calibrated limit, the test fails.  

POSSIBLE 

CAUSE 

Short to power supply in wiring harness between MAF sensor terminal D and PCM 
terminal 1AN  

MAF sensor malfunction  

Connector or terminal malfunction  

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:08:34 AM

Page 55 

© 2005 Mitchell Repair Information Company, LLC. 

DIAGNOSTIC PROCEDURE 

DTC P0103 (MZI-3.7) DIAGNOSTIC PROCEDURE 

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA 
HAS BEEN RECORDED
  

Has FREEZE FRAME DATA 

Yes Go to the next step.

No

Record FREEZE FRAME DATA on the repair order, 

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:08:34 AM

Page 56 

© 2005 Mitchell Repair Information Company, LLC. 

 

 

 

 

 

 

 

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