Mazda CX-9 Grand Touring. Manual — part 306

2



Verify related Service Bulletins
availability.



Is any related Service Bulletins
available?



If vehicle is not repaired, go to next step.

No

Go to next step.

3

VERIFY THE BRAKE PEDAL WAS
APPLIED



Was the brake pedal applied and
released during the KOEO self-
test?

Yes Go to next step.

No

Perform the KOER self-test.

Apply and release the brake pedal during the KORE

test, then go to Step 10 (See KOEO/KOER SELF

TEST [MZI-3.7].)

4

INSPECT THE OPERATION OF
THE BLAKE/TAILLIGHT



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



Depress and release the brake
pedal and check the blake/taillight
operation.



Do the blake/taillight operate
correctly?

Yes Go to next step.

No

Repair or replace harness or blake/taillight, then go

to Step 10.

5

INSPECT THE CRUISE CONTROL
OPERATION



Check for cruise control
operation.



Does the cruise control operate
correctly?

Yes Go to next step.

No Repair or replace suspected part, then go to Step 10.

6

INSPECT BRAKE SWITCH AND
PCM CONNECTOR FOR POOR
CONNECTION



Turn the ignition switch off.



Disconnect the throttle body
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 BRAKE SWITCH NO.1
CIRCUIT MALFUNCTION



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



Measure the voltage between

Yes Go to 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 10:08:42 AM

Page 357

© 2005 Mitchell Repair Information Company, LLC.

7

PCM terminal 1T (wiring harness-
side) and body ground.



Verify the following values when
the brake pedal to the floor and
releasing.



Brake pedal fully depressed:
more than 10 V



Brake pedal fully released:
less than 1.0 V



Is the voltage normal?

No Repair or replace suspected part, then go to Step 10.

8

INSPECT BRAKE SWITCH



Inspect the brake switch. (See
BRAKE SWITCH
INSPECTION .)



Is there any malfunction?

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

No

Go to the next step.

9

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.

No

The system is correctly. Go to the next step.

10

VERIFY TROUBLESHOOTING OF
DTC P1703 HAS BEEN
COMPLETED



Verify that all disconnected
connectors reconnected.



Clear DTC from memory using
M-MDS.



Perform KOEO/KOER Self-Test.



Is PENDING CODE same as
DTC present?

Yes

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

No

Go to next step.

VERIFY AFTER REPAIR
PROCEDURE

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 358

© 2005 Mitchell Repair Information Company, LLC.

DTC P2100 [MZI-3.7]

DTC P2100 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

11



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 P2100

Throttle actuator circuit open

DETECTION

CONDITION



A PCM malfunction flag is set indicating the motor circuit is open.

POSSIBLE CAUSE



Throttle actuator malfunction



Connector or terminal malfunction



Open circuit wiring harness between throttle body terminal A and PCM
terminal 2BO



Short to power supply in wiring harness between throttle body terminal A and
PCM terminal 2BO



Open circuit wiring harness between throttle body terminal B and PCM
terminal 2BR



Short to power supply in wiring harness between throttle body terminal B and
PCM terminal 2BR



Throttle actuator circuits are shorted each other

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 359

© 2005 Mitchell Repair Information Company, LLC.

DIAGNOSTIC PROCEDURE

DTC P2100 (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.

2

VERIFY RELATED REPAIR
INFORMATION AVAILABILITY



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

Yes

Perform repair or diagnosis according to the
available Service Bulletins.



If the vehicle is not repaired, go to the next

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 360

© 2005 Mitchell Repair Information Company, LLC.