Mazda X-5. Manual — part 45

ON-BOARD DIAGNOSTIC

02–02–1

02–02

02–02

ON-BOARD DIAGNOSTIC

ON-BOARD DIAGNOSTIC SYSTEM

OUTLINE (TIRE PRESSURE
MONITORING SYSTEM) . . . . . . . . . . . . 02–02–2

Block Diagram . . . . . . . . . . . . . . . . . . . 02–02–2

ON-BOARD DIAGNOSTIC SYSTEM

FUNCTION (TIRE PRESSURE
MONITORING SYSTEM) . . . . . . . . . . . . 02–02–3

Malfunction Detection Function . . . . . . 02–02–3
Malfunction Indication Function . . . . . . 02–02–3
Memory Function . . . . . . . . . . . . . . . . . 02–02–3
DTC Table . . . . . . . . . . . . . . . . . . . . . . 02–02–4

ON-BOARD DIAGNOSTIC SYSTEM

PID/DATA MONITOR FUNCTION
(TIRE PRESSURE MONITORING
SYSTEM) . . . . . . . . . . . . . . . . . . . . . . . . 02–02–5

ON-BOARD DIAGNOSTIC SYSTEM

ACTIVE COMMAND MODES
FUNCTION (TIRE PRESSURE
MONITORING SYSTEM) . . . . . . . . . . . . 02–02–6

ON-BOARD DIAGNOSTIC SYSTEM

FREEZE FRAME DATA MONITOR
FUNCTION (TIRE PRESSURE
MONITORING SYSTEM) . . . . . . . . . . . . 02–02–6

ON-BOARD DIAGNOSTIC SYSTEM

EXTERNAL TESTER COMMUNICATION
FUNCTION (TIRE PRESSURE
MONITORING SYSTEM) . . . . . . . . . . . . 02–02–6

External Tester Communication

Function. . . . . . . . . . . . . . . . . . . . . . . . 02–02–6

Serial Communication . . . . . . . . . . . . . . 02–02–7

DLC-2 CONSTRUCTION . . . . . . . . . . . . . 02–02–7

End of Toc

ON-BOARD DIAGNOSTIC

02–02–2

ON-BOARD DIAGNOSTIC SYSTEM OUTLINE (TIRE PRESSURE MONITORING SYSTEM)

E5U020237020N01

• The on-board diagnostic system consists of a malfunction detection system that detects abnormalities in input/

output signals when the ignition switch is at the ON position, a data monitor function that reads out specified
input/output signals, and an active command modes function that execuse the wheel unit ID registration.

• The Data Link Connector 2 (DLC-2), which groups together all the connectors used for malfunction diagnosis

into a single location, has been adopted, thereby improving serviceability. Diagnosis is performed by
connecting the WDS or equivalent to the DLC-2.

• In addition to DTC read-out, the WDS or equivalent is used to clear DTCs using the display screen of the

diagnostic tester, and to access the data monitor, providing enhanced malfunction diagnosis and improved
serviceability.

Block Diagram
With advanced keyless system or keyless entry system

WDS OR
EQUIVALENT

WHEEL UNITS

MALFUNCTION
INFORMATION

PID/DATA
MONITOR
FUNCTION

EXTERNAL
TESTER
COMMUNICATION
FUNCTION

MEMORY
FUNCTION

DLC-2

CAN
DRIVER

TPMS
WARNING
LIGHT

MALFUNCTION
INDICATION
FUNCTION

TPMS
WARNING
BUZZER

FLAT TIRE
WARNING
LIGHT

FLAT TIRE
WARNING
BUZZER

ON-BOARD DIAGNOSIS FUNCTION

INSTRUMENT CLUSTER

MALFUNCTION
DETERMINATION

MALFUNCTION DETECTION FUNCTION

KEYLESS
RECEIVER

KEYLESS
CM

RF SIGNAL

ACTIVE
COMMAND
MODES
FUNCTION

E5U202ZS5001

ON-BOARD DIAGNOSTIC

02–02–3

02–02

Without advanced keyless system and keyless entry system

End Of Sie

ON-BOARD DIAGNOSTIC SYSTEM FUNCTION (TIRE PRESSURE MONITORING SYSTEM)

E5U020237020N02

Malfunction Detection Function

• The malfunction detection function detects malfunctions in the input/output signal system of the tire pressure

monitoring system (TPMS) control module based on abnormal signals from the wheel units when the ignition
switch is in the ON position or driving the vehicle.

• The TPMS warning light illuminates for approx. 3.0 s when the ignition switch is turned to the ON position to

inspect for open circuits in the light.

Malfunction Indication Function

• When the malfunction detection function detects a malfunction, the TPMS warning light illuminates to advise

the driver. Using the external tester communication function, DTCs can be output to the DLC-2 via the CAN
communication line. At the same time, malfunction detection results are sent to the memory functions.

Memory Function

• The memory function stores DTCs for malfunctions in input/output signal systems. With this function, once a

DTC is stored it is not cleared after the ignition switch has been turned off (LOCK position), even if the
malfunctioning signal system has returned to normal.

• Since instrument cluster has a built-in non-volatile memory, DTCs are not cleared even if the battery is

removed. Therefore, it is necessary to clear the memory after performing repairs. Refer to the Workshop
Manual for the DTC clearing procedure.

WDS OR
EQUIVALENT

WHEEL UNITS

MALFUNCTION
INFORMATION

PID/DATA
MONITOR
FUNCTION

EXTERNAL
TESTER
COMMUNICATION
FUNCTION

MEMORY
FUNCTION

DLC-2

CAN
DRIVER

TPMS
WARNING
LIGHT

MALFUNCTION
INDICATION
FUNCTION

TPMS
WARNING
BUZZER

FLAT TIRE
WARNING
LIGHT

FLAT TIRE
WARNING
BUZZER

ON-BOARD DIAGNOSIS FUNCTION

INSTRUMENT CLUSTER

MALFUNCTION
DETERMINATION

MALFUNCTION DETECTION FUNCTION

KEYLESS
RECEIVER

RF SIGNAL

ACTIVE
COMMAND
MODES
FUNCTION

E5U202ZS5003

ON-BOARD DIAGNOSTIC

02–02–4

DTC Table

End Of Sie

Malfunction location

DTC

(WDS or equivalent)

TPMS warning light

illumination condition

TPMS warning light
illumination pattern

Instrument cluster

B1342

Illuminated

System configuration malfunction

B2477

Illuminated

Wheel unit 1 internal fault

B2868

Illuminated

Wheel unit 2 internal fault

B2869

Illuminated

Wheel unit 3 internal fault

B2870

Illuminated

Wheel unit 4 internal fault

B2871

Illuminated

Non-volatile memory failure

B2143

Illuminated

Wheel unit 1 communication
malfunction

U2616

Illuminated

Wheel unit 2 communication
malfunction

U2617

Illuminated

Wheel unit 3 communication
malfunction

U2618

Illuminated

Wheel unit 4 communication
malfunction

U2619

Illuminated

Lost communication with keyless
receiver

U0127

Illuminated

ON

OFF

1 s

0.2 s

ON

OFF

0.5 s

0.5 s

ON

OFF

2 s

2 s

ON

OFF

1 s

0.2 s

ON

OFF

1 s

1 s

ON

OFF

1 s

0.2 s