Mazda CX-9 Grand Touring. Manual — part 315
DIAGNOSTIC PROCEDURE
DTC P2127 (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 10:08:43 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).
Are 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.2
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 H 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.2
Inspect APP sensor No.2. (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 10:08:43 AM
Page 394
© 2005 Mitchell Repair Information Company, LLC.
DTC P2128 [MZI-3.7]
DTC P2128 (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).
Are there any malfunction?
7.
No
Go to the next step.
7
VERIFY TROUBLESHOOTING OF
DTC P2127 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 P2128
APP sensor No.2 circuit high input
DETECTION
CONDITION
APP sensor No.2 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 1 AD
Open circuit wiring harness between APP sensor terminal C and PCM
terminal 1 AH
Open circuit wiring harness between APP sensor terminal H and PCM
terminal 1 AG
Snort to power supply in wiring harness between APP sensor terminal F and
PCM terminal 1BA
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 10:08:43 AM
Page 395
© 2005 Mitchell Repair Information Company, LLC.
PCM terminal 1Y
Short to power supply in wiring harness between APP sensor terminal G and
PCM terminal 1 AD
Short to power supply in wiring harness between APP sensor terminal C and
PCM terminal 1AH
Short to power supply in wiring harness between APP sensor terminal H and
PCM terminal 1 AG
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 10:08:43 AM
Page 396
© 2005 Mitchell Repair Information Company, LLC.
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