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Mazda CX-9 Grand Touring. Manual - part 295

DIAGNOSTIC PROCEDURE

DTC P1101 (MZI-3.7) DIAGNOSTIC PROCEDURE

POSSIBLE

CAUSE



Open circuit wiring harness between MAF sensor terminal B (wiring harness-side) and
body ground



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



Connector or terminal malfunction



MAF sensor malfunction

STEP

INSPECTION

ACTION

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:40 AM

Page 313

VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED



Has FREEZE FRAME DATA been
recorded?

Yes Go to next step.

Record FREEZE FRAME DATA on the

repair order, then go to next step.

VERIFY RELATED REPAIR
INFORMATION AVAILABILITY



Verify related Service Bulletins
availability.



Is any related Service Bulletins
available?

Yes

Perform repair or diagnosis according to
available Service Bulletins.



If vehicle is not repaired, go to next
step.

Go to the next step.

VERIFY RELATED PENDING CODE OR
STORED DTC



Verify the related PENDING CODE or
stored DTCs.



Are other DTCs present?

Yes

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

Go to the next step.

INSPECT MAF SIGNAL SENT TO PCM



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



Access MAF PID using the M-MDS



Is the voltage between 0.46-2.44 V

Yes

Perform the "INTERMITTENT CONCERN
TROUBLESHOOTING". Then go to Step 10.

Go to the next step.

INSPECT MAF SENSOR AND PCM
CONNECTOR FOR POOR
CONNECTION



Turn the ignition switch off.



Disconnect the MAF/IAT sensor and
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.

Go to the next step.

INSPECT MAF SENSOR GROUND
CIRCUIT FOR OPEN CIRCUIT



Turn the ignition switch off.



Inspect continuity between MAF sensor
terminal B (wiring harness-side) and
body ground.



Is there continuity?

Yes Go to the next step.

Repair or replace suspected part, then go to

Step 10.

INSPECT MAF SENSOR SIGNAL
CIRCUIT FOR OPEN CIRCUIT

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:40 AM

Page 314



Turn the ignition switch off.



Inspect continuity between MAF sensor
terminal C (wiring harness-side) and
PCM terminal 1AJ (wiring harness-
side).



Is there continuity?

Yes Go to the next step.

Repair or replace suspected part, then go to

Step 10.

INSPECT MAF SENSOR



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



Is there any malfunction?

Yes

Replace the MAF/IAT sensor, then go to Step
10.

Go to the next step.

INSPECT FOR CORRECT PCM
OPERATION



Disconnect all the PCM connectors.



Visually inspect for:



Pushed out pins



Corrosion



Connect all the PCM connectors and
verify that they seat correctly.



Retrieve DTCs using the M-MDS.



Is the PENDING CODE for this DTC
present?

Yes Go to the next step.

The system is correctly. Go to the next step.

VERIFY TROUBLESHOOTING OF DTC
P1101 HAS BEEN COMPLETED



Verify that all disconnected connectors
reconnected.



Clear DTC from memory using M-MDS.



Start engine.



Perform "KOEO/KOER self-test" (See
KOEO/KOER SELF TEST [MZI-
3.7].)



Is same DTC present?

Yes

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

Go to the next step.

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].)

Troubleshooting completed.

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:40 AM

Page 315

DTC P1127 [MZI-3.7]

DTC P1127 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

DIAGNOSTIC PROCEDURE

DTC P1127 (MZI-3.7) DIAGNOSTIC PROCEDURE

DTC P1127

Exhaust temperature out of range, HO2S tests not completed

DETECTION

CONDITION



The HO2S monitor uses an exhaust temperature model to determine when the
HO2S heaters are cycled ON. The test fails when the inferred exhaust
temperature is below a minimum calibrated value.

POSSIBLE

CAUSE



Engine not operating long enough prior to carrying out the KOER self-test



Exhaust system too cool

STEP

INSPECTION

ACTION

VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED



Has FREEZE FRAME DATA been
recorded?

Yes Go to the next step.

Record FREEZE FRAME DATA on the repair

order, then go to next step.

VERIFY RELATED REPAIR
INFORMATION AVAILABILITY



Verify related Service Bulletins
availability.



Is any related Service Bulletins
available?

Yes

Perform repair or diagnosis according to
available Service Bulletins.



If vehicle is not repaired, go to next step.

Go to the next step.

EXHAUST TEMPERATURE OUT OF
RANGE



Turn the ignition switch to the ON
position (Engine running)



Verify that the engine is at normal
operating temperature.



Access the PCM and monitor the
HO2S heater PID.



Is the PID state ON?

NOTE:



Address all other DTCs before
proceeding.

Yes

Perform the KOER self-test, then go to the next
step. (See KOEO/KOER SELF TEST [MZI-
3.7].)

Run the engine until the PID indicates ON.

Perform the KOER self-test, then go to the next

step.

(See KOEO/KOER SELF TEST [MZI-3.7].)

VERIFY TROUBLESHOOTING OF
DTC P1127 HAS BEEN COMPLETED

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:40 AM

Page 316

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