Mazda CX-9 Grand Touring. Manual — part 318

6



Turn the ignition switch off.



Inspect for continuity between the
following terminals (wiring harness-
side).



APP sensor terminal F and
PCM terminal 1BA.



APP sensor terminal D and
PCM terminal 1Y.



APP sensor terminal G and
PCM terminal 1AD.



APP sensor terminal C and
PCM terminal 1AH.



APP sensor terminal B and
PCM terminal 1AC.



Are there continuity?

Yes Go to the next step.

No

Repair or replace suspected part, then go to Step

8.

7

INSPECT APP SENSOR NO.3 SIGNAL
CIRCUIT FOR SHORT TO POWER
SUPPLY



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



Measure the voltage between the
following terminals (wiring harness-
side).



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 B and
body ground.



Are there voltage B+?

Yes

Repair or replace suspected part, then go to Step
8.

No

Go to the next step.

8

VERIFY TROUBLESHOOTING OF
DTC P2133 HAS BEEN COMPLETED



Verify that all disconnected
connectors reconnected.



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

Yes

Replace the 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 10:08:43 AM

Page 405

© 2005 Mitchell Repair Information Company, LLC.

DTC P2135 [MZI-3.7]

DTC P2135 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES



Start the engine.



Is the same DTC present?

No

Go to the next step.

9

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 P2135

TP sensor No.1/No.2 voltage correlation

DETECTION

CONDITION



The PCM flagged a concern indicating that TP sensor No.1 and TP sensor No.2
disagree by more than a calibrated limit.

POSSIBLE CAUSE



Short to power supply between TP sensor No.1 terminal F and PCM terminal 2Z



Short to power supply between TP sensor No.2 terminal C and PCM terminal
2AD



TP sensor circuits are shorted each other



TP 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 406

© 2005 Mitchell Repair Information Company, LLC.

DIAGNOSTIC PROCEDURE

DTC P2135 (MZI-3.7) DIAGNOSTIC PROCEDURE

STEP

INSPECTION

ACTION

VERIFY FREEZE FRAME DATA
HAS BEEN RECORDED

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 10:08:43 AM

Page 407

© 2005 Mitchell Repair Information Company, LLC.

1



Has FREEZE FRAME DATA been
recorded?

No

Record the FREEZE FRAME DATA on the repair

order, then go to the next step.

2

VERIFY RELATED REPAIR
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 TP SENSOR RESISTANCE



Turn the ignition switch off.



Disconnect the throttle body
connector.



Measure the resistance between the
following terminals (throttle body
component side).



Throttle body terminal F and
D: 700-1,800 ohms



Throttle body terminal F and
E: 1,300-2,800 ohms



Throttle body terminal C and
D: 1,000-2,400 ohms



Throttle body terminal C and
E: 500-1,500 ohms



Throttle body terminal D and
E: 700-2,100 ohms



Are all the resistances within
specifications?

Yes Go to the next step.

No

Replace the throttle body, then go to Step 6. (See

INTAKE-AIR SYSTEM

REMOVAL/INSTALLATION [MZI-3.7] .)

4

INSPECT TP SENSOR SIGNAL
CIRCUIT FOR SHORT TO POWER
SUPPLY



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



Measure the voltage between the
following circuits:



Throttle body terminal F
(wiring harness-side) and
body ground.



Throttle body terminal C
(wiring harness-side) and

Yes Repair or replace suspected part, then go to Step 6.

No

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 10:08:43 AM

Page 408

© 2005 Mitchell Repair Information Company, LLC.