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Mazda CX 7. Manual - part 154

ON-BOARD DIAGNOSTIC

02-02–5

02-02

DTC Table

PID/DATA Monitor Table

DTC

Description

Page

M-MDS

B1342

Instrument cluster internal malfunction

(See 09-02E-5 DTC B1342[INSTRUMENT
CLUSTER].)

B2143

ID registration failure

(See 02-02-8 DTC B2143.)

B2477

Instrument cluster configuration not performed

(See 09-02E-5 DTC B2477[INSTRUMENT
CLUSTER].)

B2868

Wheel unit No.1 internal malfunction

(See 02-02-8 DTC B2868, B2869, B2870,
B2871.)

B2869

Wheel unit No.2 internal malfunction

(See 02-02-8 DTC B2868, B2869, B2870,
B2871.)

B2870

Wheel unit No.3 internal malfunction

(See 02-02-8 DTC B2868, B2869, B2870,
B2871.)

B2871

Wheel unit No.4 internal malfunction

(See 02-02-8 DTC B2868, B2869, B2870,
B2871.)

U0127

Communication failure between instrument
cluster and keyless receiver

(See 02-02-9 DTC U0127.)

U2616

Wheel unit No.1 (No response)

(See 02-02-11 DTC U2616, U2617, U2618,
U2619.)

U2617

Wheel unit No.2 (No response)

(See 02-02-11 DTC U2616, U2617, U2618,
U2619.)

U2618

Wheel unit No.3 (No response)

(See 02-02-11 DTC U2616, U2617, U2618,
U2619.)

U2619

Wheel unit No.4 (No response)

(See 02-02-11 DTC U2616, U2617, U2618,
U2619.)

PID Name

(Definition)

Unit/

Condition

Condition/Specification

Action

AI_WU1_ID
AI_WU2_ID
AI_WU3_ID
AI_WU4_ID
(Wheel unit ID code (during ID
registration))

–

Indicates the wheel unit ID code.
(During wheel unit ID registration.)

• Replace the wheel unit.

• Perform the wheel unit ID

registration.

AI_WU1_P
AI_WU2_P
AI_WU3_P
AI_WU4_P
(Tire pressure value (during ID
registration))

Pa/psi

Indicates the tire pressure. (During ID
registration.)

• Adjust tire pressure.

• Replace the wheel unit.

• Perform the wheel unit ID

registration.

FFD1_WU1_P
FFD1_WU2_P
FFD1_WU3_P
FFD1_WU4_P
(Tire pressure value (freeze frame
PID data 1))

Pa/psi

Indicates the tire pressure. (Freeze
frame PID data 1)

Adjust tire pressure.

FFD2_WU1_P
FFD2_WU2_P
FFD2_WU3_P
FFD2_WU4_P
(Tire pressure value (freeze frame
PID data 2))

Pa/psi

Indicates the tire pressure. (Freeze
frame PID data 2)

Adjust tire pressure.

FFD1_WU1_T
FFD1_WU2_T
FFD1_WU3_T
FFD1_WU4_T
(Internal tire air temperature value
(freeze frame PID data 1))

°C/°F

Indicates the internal tire air
temperature. (Freeze frame PID data 1)

Adjust tire pressure.

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ON-BOARD DIAGNOSTIC

02-02–6

: 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.

Active Command Modes Table

End Of Sie

FFD2_WU1_T
FFD2_WU2_T
FFD2_WU3_T
FFD2_WU4_T
(Internal tire air temperature value
(freeze frame PID data 2))

°C/°F

Indicates the internal tire air
temperature. (Freeze frame PID data 2)

Adjust tire pressure.

FFD1_MLG
(Wheel unit mileage value (freeze
frame PID data 1))

m/mi (ft)

Indicates the mileage. (Freeze frame
PID data 1)

Adjust tire pressure.

FFD2_MLG
(Wheel unit mileage value (freeze
frame PID data 2))

m/mi (ft)

Indicates the mileage. (Freeze frame
PID data 2)

Adjust tire pressure.

FFD1_SPD
(Wheel unit speed value (freeze
frame PID data 1))

KPH/MPH

Indicates the speed. (Freeze frame PID
data 1)

Adjust tire pressure.

FFD2_SPD
(Wheel unit speed value (freeze
frame PID data 2))

KPH/MPH

Indicates the speed. (Freeze frame PID
data 2)

Adjust tire pressure.

IC_DTC_CNT
(Number of continuous DTCs)

–

Indicates number of DTC

Perform the DTC inspection.

ID_LAST*
(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*
ID_WU2*
ID_WU3*
ID_WU4*
(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*
WU2_P*
WU3_P*
WU4_P*
(Tire pressure value)

Pa/psi

Indicates the tire pressure. (See 02-50-
1 SUSPENSION TECHNICAL DATA.)

• Adjust tire pressure.

• Replace the wheel unit.

WU1_T*
WU2_T*
WU3_T*
WU4_T*
(Internal tire air temperature value)

°C/°F

Indicates the internal tire air
temperature.

Replace the wheel unit.

PID Name

(Definition)

Unit/

Condition

Condition/Specification

Action

Command Name

Definition

Operation

Note

IDR_MODE

Wheel unit ID registration mode

ON/OFF

Ignition switch at ON

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ON-BOARD DIAGNOSTIC

02-02–7

02-02

MALFUNCTIONING WHEEL UNIT IDENTIFICATION

id020200800300

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 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.

1. Adjust the air pressure as follows:

— RF: 220 kPa {2.2 kgf/cm

, 32 psi}

— LF: 240 kPa {2.4 kgf/cm

, 35 psi}

— LR: 260 kPa {2.6 kgf/cm

, 38 psi}

— RR: 280 kPa {2.8 kgf/cm

, 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.

End Of Sie

AIR PRESSURE
VALUE SET IN STEP.1

PID MONITOR VALUE

RF 220 KPA
LF 240 KPA
LR 260 KPA
RR 280 KPA

WU1_P 240 KPA
WU2_P 220 KPA
WU3_P 280 KPA
WU4_P 260 KPA

FR: WU2_P
FL: WU1_P
RL: WU4_P
RR: WU3_P

acxuuw00001191

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ON-BOARD DIAGNOSTIC

02-02–8

DTC B2143

id020200800400

Diagnostic procedure

End Of Sie

DTC B2868, B2869, B2870, B2871

id020200800500

Diagnostic procedure

End Of Sie

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

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

Go to the next step.

VERIFY TROUBLESHOOTING COMPLETED

• Clear the DTC from the memory.

(See 02-02-3 TIRE PRESSURE
MONITORING SYSTEM (TPMS) ON-
BOARD 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 09-22-2 INSTRUMENT CLUSTER REMOVAL/
INSTALLATION.)
(See 02-12-4 WHEEL UNIT REMOVAL/
INSTALLATION.)

Go to the next step.

VERIFY AFTER REPAIR PROCEDURE

• Are there any other DTCs present?

Yes

Go to the applicable DTC inspection. (See 02-02-3 TIRE
PRESSURE MONITORING SYSTEM (TPMS) ON-BOARD
DIAGNOSIS.)

DTC troubleshooting completed.

DTC

B2868
B2869
B2870
B2871

Wheel unit No.1 (internal malfunction)
Wheel unit No.2 (internal malfunction)
Wheel unit No.3 (internal malfunction)
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

IDENTIFY MALFUNCTIONING WHEEL UNIT

• (See 02-02-7 MALFUNCTIONING WHEEL UNIT

IDENTIFICATION.)

• Identify the malfunctioning wheel unit.

• Replace and register the wheel unit. (See 02-12-4

WHEEL UNIT ID REGISTRATION.)

• Go to the next step.

VERIFY TROUBLESHOOTING COMPLETED

• Clear the DTC from the memory.

(See 02-02-3 TIRE PRESSURE
MONITORING SYSTEM (TPMS) ON-
BOARD 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.

Go to the next step.

VERIFY AFTER REPAIR PROCEDURE

• Are there any other DTCs present?

Yes

Go to the applicable DTC inspection. (See 02-02-3 TIRE
PRESSURE MONITORING SYSTEM (TPMS) ON-BOARD
DIAGNOSIS.)

DTC troubleshooting completed.

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