Mazda CX-9 Grand Touring. Manual — part 313

DTC P2122 [MZI-3.7]

DTC P2122 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES



Is the PENDING CODE for the DTC
present?

No

Go to the next step.

13

VERIFY AFTER REPAIR PROCEDURE



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



Are any DTCs present?

Yes

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

No

Troubleshooting completed.

DTC P2122

APP sensor No.1 circuit low input

DETECTION

CONDITION



APP sensor No.1 is out of self-test range low.

POSSIBLE CAUSE



Short to ground circuit between APP sensor terminal F and PCM terminal
1BA



Short to ground circuit between APP sensor terminal D and PCM terminal
1Y



Short to ground circuit between APP sensor terminal G and PCM terminal 1
AD



Short to ground circuit between APP sensor terminal C and PCM terminal
1AH



Short to ground circuit between APP sensor terminal E and PCM terminal
1AK



Connector or terminal malfunction



APP sensor malfunction

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:42 AM

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© 2005 Mitchell Repair Information Company, LLC.

DIAGNOSTIC PROCEDURE

DTC P2122 (MZI-3.7) DIAGNOSTIC PROCEDURE

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED



Has FREEZE FRAME DATA been
recorded?

Yes Go to the next step.

No

Record FREEZE FRAME DATA on the repair

order, then go to the next step.

VERIFY RELATED REPAIR

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:42 AM

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© 2005 Mitchell Repair Information Company, LLC.

2

INFORMATION AVAILABILITY



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



Is any related Service Bulletins
available?

Yes

Perform repair or diagnosis according to the
available Service Bulletins.



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

No

Go to the next step.

3

INSPECT APP SENSOR CONNECTOR
FOR POOR CONNECTION



Turn the ignition switch off.



Disconnect the APP sensor
connector.



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



Is there any malfunction?

Yes

Repair or replace suspected part, then go to Step
7.

No

Go to the next step.

4

INSPECT APP SENSOR NO.1
CIRCUIT FOR SHORT TO GROUND



Turn the ignition switch off.



Inspect for continuity between the
following terminals:



APP sensor terminal F and
body ground.



APP sensor terminal D and
body ground.



APP sensor terminal G and
body ground.



APP sensor terminal C and
body ground.



APP sensor terminal E and
body ground.



Are there continuity?

Yes

Repair or replace suspected part, then go to Step
7.

No

Go to the next step.

5

INSPECT APP SENSOR NO.1



Inspect APP sensor No.1. (See
ACCELERATOR PEDAL
POSITION (APP) SENSOR
INSPECTION [MZI-3.7] .)



Is there any malfunction?

Yes

Replace the accelerator pedal, then go to Step 7.
(See ACCELERATOR PEDAL
REMOVAL/INSTALLATION [MZI-3.7] .)

No

Go to the next step.

INSPECT PCM CONNECTOR FOR
POOR CONNECTION

Yes

Repair or replace suspected part, then go to Step

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:42 AM

Page 387

© 2005 Mitchell Repair Information Company, LLC.

DTC P2123 [MZI-3.7]

DTC P2123 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

6



Turn the ignition switch off.



Disconnect the PCM connector.



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



Is there any malfunction?

7.

No

Go to the next step.

7

VERIFY TROUBLESHOOTING OF
DTC P2122 HAS BEEN COMPLETED



Verify that all disconnected
connectors reconnected.



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



Start the engine.



Is the same DTC present?

Yes

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

No

Go to the next step.

8

VERIFY AFTER REPAIR
PROCEDURE



Perform the "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

DTC troubleshooting completed.

DTC P2123

APP sensor No.1 circuit high input

DETECTION

CONDITION



APP sensor No.1 is out of self-test range high.

POSSIBLE CAUSE



Open circuit wiring harness between APP sensor terminal F and PCM
terminal 1BA



Open circuit wiring harness between APP sensor terminal D and PCM
terminal 1Y



Open circuit wiring harness between APP sensor terminal G and PCM
terminal 1AD



Open circuit wiring harness between APP sensor terminal C and PCM
terminal 1 AH



Open circuit wiring harness between APP sensor terminal E and PCM
terminal 1AK



Short to power supply in wiring harness between APP sensor terminal F and
PCM terminal 1 BA



Short to power supply in wiring harness between APP sensor terminal D and

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:42 AM

Page 388

© 2005 Mitchell Repair Information Company, LLC.