Mazda CX-9 Grand Touring. Manual — part 586

ACTIVE COMMAND MODES TABLE

ACTIVE COMMAND MODES CHART

MALFUNCTIONING WHEEL UNIT IDENTIFICATION

IC_DTC_CNT
(Number of continuous
DTCs)

-

Indicates number of DTC

Perform the DTC
inspection.

ID_LAST

(1)

(Last received tire
transmitter ID code
value)

-

Indicates the last ID that is
transmitted from the wheel unit.



Replace the wheel
unit.



Perform the
configuration.

ID_WU1

(1)

ID_WU2

(1)

ID_WU3

(1)

ID_WU4

(1)

(Registered wheel unit
ID code)

-

Indicates the registered ID that is
transmitted from the wheel unit.



Replace the wheel
unit.



Perform the wheel
unit ID registration.

WU1_P

(1)

WU2_P

(1)

WU3_P

(1)

WU4_P

(1)

(Tire pressure value)

Pa, psi

Indicates the tire pressure. (See
SUSPENSION TECHNICAL
DATA .)



Adjust tire pressure.



Replace the wheel
unit.

WU1_T

(1)

WU2_T

(1)

WU3_T

(1)

WU4_T

(1)

(Internal tire air
temperature value)

°C, °F

Indicates the internal tire air
temperature.

Replace the wheel unit.

(1)

Data transmission from the wheel unit occurs when the vehicle speed is 25 km/h {15.5 mph} or
more . Due to this, the current air pressure and temperature data can only be displayed after the
vehicle is driven at 25 km/h {15.5 mph} or more . Also, the ID_LAST, and tire pressure and internal
tire air temperature data are erased when the instrument cluster connector and the battery terminal are
disconnected. If the instrument cluster is replaced or the battery terminals are disconnected, drive the
vehicle at 25 km/h {15.5 mph} or more and display the tire pressure PID after the data transmission.

Command Name

Definition

Operation

Note

IDR_MODE

Wheel unit ID registration mode

OFF/ON

Ignition switch at ON

NOTE:



The tire pressure monitoring system (TPMS) does not identify the location
of the malfunctioning wheel unit on the vehicle (RF, LF, LR, RR). The TPMS

2008 Mazda CX-9 Grand Touring

2008 SUSPENSION On-Board Diagnostic (Suspension) - Mazda CX-9

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Sunday, November 15, 2009 10:25:36 AM

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1. Adjust the air pressure as follows:



RF: 220 kPa {2.2 kgf/cm

2

, 32 psi}



LF: 240 kPa {2.4 kgf/cm

2

, 35 psi}



LR: 260 kPa {2.6 kgf/cm

2

, 38 psi}



RR: 280 kPa {2.8 kgf/cm

2

, 40 psi}

2. Turn the ignition switch off.

3. Connect the M-MDS to the DLC-2.

4. Turn the ignition switch to the ON position.

5. Drive the vehicle at a speed of 25 km/h {15.5 mph} or more for 2 min or more

6. Select the following PIDs using the M-MDS, and monitor them.



WU1_P



WU2_P



WU3_P



WU4_P

7. Determine which wheel unit identification code matches which wheel and tire by comparing the PID

monitor values with the air pressure values set in Step 1.

8. Select the ID_LAST PID using the M-MDS, and take a note of four displayed identification codes.

9. Inspect the DTCs using the M-MDS.

Fig. 8: Wheel Unit Identification Code Chart
Courtesy of MAZDA MOTORS CORP.

DTC B2143

identifies each wheel unit as No.1, No.2, No.3 and No.4. In order to identify
the location of the wheel unit, perform the following procedure.

2008 Mazda CX-9 Grand Touring

2008 SUSPENSION On-Board Diagnostic (Suspension) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:25:36 AM

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© 2005 Mitchell Repair Information Company, LLC.

DTC B2143 DETECTION CONDITION AND POSSIBLE CAUSE

DIAGNOSTIC PROCEDURE

DTC B2143 DIAGNOSTIC PROCEDURE

DTC B2868, B2869, B2870, B2871

DTC B2868, B2869, B2870, B2871 DETECTION CONDITION AND POSSIBLE CAUSE

DTC B2143



ID registration failure

DETECTION CONDITION



Two or more codes are overlapping.

POSSIBLE CAUSE



ID registration procedure has not been performed properly.

STEP

INSPECTION

ACTION

1

VERIFY THE PROGRAMMED ID



Turn the ignition switch off.



Connect the M-MDS to the DLC-2.



Select the following PIDs using the
M-MDS:



ID_WU1



ID_WU2



ID_WU3



ID_WU4



Turn the ignition switch to the ON
position.



Is the same code in the output ID?

Yes

Register the wheel unit ID, then go to the next
step. (See WHEEL UNIT ID
REGISTRATION .)

No

Go to the next step.

2

VERIFY TROUBLESHOOTING
COMPLETED



Clear the DTC from the memory.
(See TIRE PRESSURE
MONITORING SYSTEM
(TPMS) ONBOARD DIAGNOSIS.)



Drive the vehicle at a speed of 25
km/h {15.5 mph} or more for 10
min or more.



Is the same DTC present?

Yes



Repeat the inspection from Step 1.

If the malfunction recurs, replace the instrument
cluster and/or wheel unit.
(See INSTRUMENT CLUSTER
REMOVAL/INSTALLATION .)
(See WHEEL UNIT
REMOVAL/INSTALLATION .)

No

Go to the next step.

3

VERIFY AFTER REPAIR
PROCEDURE



Are there any other DTCs present?

Yes

Go to the applicable DTC inspection. (See TIRE
PRESSURE MONITORING SYSTEM
(TPMS) ON-BOARD DIAGNOSIS.)

No

DTC troubleshooting completed.

DTC B2868

Wheel unit No.1 (internal malfunction)

2008 Mazda CX-9 Grand Touring

2008 SUSPENSION On-Board Diagnostic (Suspension) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:25:36 AM

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© 2005 Mitchell Repair Information Company, LLC.

DIAGNOSTIC PROCEDURE

DTC B2868, B2869, B2870, B2871 DIAGNOSTIC PROCEDURE

DTC U0127

DTC U0127 DETECTION CONDITION AND POSSIBLE CAUSE

DTC B2869

Wheel unit No.2 (internal malfunction)

DTC B2870

Wheel unit No.3 (internal malfunction)

DTC B2871

Wheel unit No.4 (internal malfunction)

DETECTION CONDITION



The instrument cluster receives error signals from the wheel unit.

POSSIBLE CAUSE



Internal malfunction of wheel unit

STEP

INSPECTION

ACTION

1

IDENTIFY MALFUNCTIONING WHEEL
UNIT



(See MALFUNCTIONING WHEEL
UNIT IDENTIFICATION.)



Identify the malfunctioning wheel unit.



Replace and register the wheel unit. (See
WHEEL UNIT ID
REGISTRATION .)



Go to the next step.

2

VERIFY TROUBLESHOOTING
COMPLETED



Clear the DTC from the memory. (See
TIRE PRESSURE MONITORING
SYSTEM (TPMS) ONBOARD
DIAGNOSIS.)



Drive the vehicle at a speed of 25 km/h
{15.5 mph} or more for 10 min or
more.



Is the same DTC present?

Yes Go to Step 1.

No

Go to the next step.

3

VERIFY AFTER REPAIR PROCEDURE



Are there any other DTCs present?

Yes

Go to the applicable DTC inspection. (See
TIRE PRESSURE MONITORING
SYSTEM (TPMS) ON-BOARD
DIAGNOSIS.)

No

DTC troubleshooting completed.

DTC U0127



Communication failure between instrument cluster and keyless
receiver

DETECTION

CONDITION



The instrument cluster cannot receive signal from the keyless CM or
keyless receiver.

With advanced keyless system



Open or short circuit in the wiring harness between the keyless CM

2008 Mazda CX-9 Grand Touring

2008 SUSPENSION On-Board Diagnostic (Suspension) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:25:36 AM

Page 12

© 2005 Mitchell Repair Information Company, LLC.