Infiniti FX35, FX50 (S51). Manual - part 1927

 

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Content   ..  1925  1926  1927  1928   ..

 

 

Infiniti FX35, FX50 (S51). Manual - part 1927

 

 

DIAGNOSIS SYSTEM (LOW TIRE PRESSURE WARNING CONTROL UNIT)

WT-11

< SYSTEM DESCRIPTION >

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DIAGNOSIS SYSTEM (LOW TIRE PRESSURE WARNING CONTROL
UNIT)

Diagnosis Description

INFOID:0000000005243065

Description

During driving, the transmitter installed at each road wheel transmits the tire pressure information signal to the
receiver. The receiver receives the tire pressure signal and transmits it to the low tire pressure warning control
unit. The low tire pressure warning control unit judges whether or not the tire pressure is OK based on the tire
pressure information signal, and if it judges that the tire pressure is low, it transmits the information via CAN
communication to the BCM.
After receiving the tire pressure malfunction information via CAN communication, the BCM transmits the tire
pressure malfunction information via CAN communication to the combination meter.
After receiving the tire pressure information via CAN communication from the BCM, the combination meter illu-
minates the low tire pressure warning lamp in order to warn the driver.

Self-diagnosis procedure

1.

Initiate diagnosis mode by short-circuiting the low tire pressure warning check switch to the ground.

2.

The blinking pattern of the low tire pressure warning lamp indicates the conditions of the malfunction.

NOTE:
If the low tire pressure warning lamp is blinking repeatedly at 5 Hz, there is no malfunction occurring in the
system.

SEIA0745E

Flickering pattern

Items

Diagnostic item is detected when...

Check item

15

Tire pressure value
(Front LH)

Front LH tire pressure drops to 182 kPa (1.82 kg/cm

2

, 26.5 psi) 

or less

WT-14

16

Tire pressure value
(Front RH)

Front RH tire pressure drops to 182 kPa (1.82 kg/cm

2

, 26.5 psi) 

or less

17

Tire pressure value
(Rear RH)

Rear RH tire pressure drops to 182 kPa (1.82 kg/cm

2

, 26.5 psi) 

or less

18

Tire pressure value
(Rear LH)

Rear LH tire pressure drops to 182 kPa (1.82 kg/cm

2

, 26.5 psi) 

or less

21

Transmitter no data
(Front LH)

Data from front LH transmitter cannot be received.

WT-16

22

Transmitter no data
(Front RH)

Data from front RH transmitter cannot be received.

23

Transmitter no data
(Rear RH)

Data from rear RH transmitter cannot be received.

24

Transmitter no data
(Rear LH)

Data from rear LH transmitter cannot be received.

WT-12

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (LOW TIRE PRESSURE WARNING CONTROL UNIT)

Erase the diagnosis history.

After performing self-diagnosis by short-circuiting the Tire Pressure warning check switch to the body, turn the
ignition switch OFF.

CONSULT-III Function

INFOID:0000000005243066

FUNCTION

31

Transmitter checksum 
error
(Front LH)

Checksum data from front LH transmitter is malfunctioning.

WT-22

32

Transmitter checksum 
error
(Front RH)

Checksum data from front RH transmitter is malfunctioning.

33

Transmitter checksum 
error
(Rear RH)

Checksum data from rear RH transmitter is malfunctioning.

34

Transmitter checksum 
error
(Rear LH)

Checksum data from rear LH transmitter is malfunctioning.

35

Transmitter pressure 
data error (Front LH)

Air pressure data from front LH transmitter is malfunction.

WT-20

36

Transmitter pressure 
data error (Front RH)

Air pressure data from front RH transmitter is malfunction.

37

Transmitter pressure 
data error (Rear RH)

Air pressure data from rear RH transmitter is malfunction.

38

Transmitter pressure 
data error (Rear LH)

Air pressure data from rear LH transmitter is malfunction.

41

Transmitter function 
code error (Front LH)

Function code data from front LH transmitter is malfunctioning.

WT-22

42

Transmitter function 
code error (Front RH)

Function code data from front RH transmitter is malfunctioning.

43

Transmitter function 
code error (Rear RH)

Function code data from rear RH transmitter is malfunctioning.

44

Transmitter function 
code error (Rear LH)

Function code data from rear LH transmitter is malfunctioning.

51

Receiver ID registration 
not completed.

Receiver ID registration cannot be performed.

WT-26

52

Vehicle speed signal er-
ror

Speed signal is not detected.

WT-30

54

EEPROM read error

Tire Pressure Monitoring System (TPMS) malfunction in the 
low tire pressure warning control unit

WT-32

55

Low communication per-
formance (Front LH)

The data signal from the front LH wheel transmitter cannot be 
detected due to external electromagnetic interference. (DTC 
C1708 is displayed at the same time.)

WT-35

56

Low communication per-
formance (Front RH)

The data signal from the front RH wheel transmitter cannot be 
detected due to external electromagnetic interference. (DTC 
C1709 is displayed at the same time.)

57

Low communication per-
formance (Rear RH)

The data signal from the rear RH wheel transmitter cannot be 
detected due to external electromagnetic interference. (DTC 
C1710 is displayed at the same time.)

58

Low communication per-
formance (Rear LH)

The data signal from the rear LH wheel transmitter cannot be 
detected due to external electromagnetic interference. (DTC 
C1711 is displayed at the same time.)

No flickering

Tire pressure warning 
check switch

Tire pressure warning check switch circuit is open.

Flickering pattern

Items

Diagnostic item is detected when...

Check item

DIAGNOSIS SYSTEM (LOW TIRE PRESSURE WARNING CONTROL UNIT)

WT-13

< SYSTEM DESCRIPTION >

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The diagnosis functions (main functions) include the following: “WORK SUPPORT”, “SELF DIAGNOSTIC
RESULT”, “DATA MONITOR”, “ACTIVE TEST”, and “ECU IDENTIFICATION”.

WORK SUPPORT

Refer to 

WT-7, "ID REGISTRATION PROCEDURE : Transmitter ID Registration Procedure"

SELF-DIAGNOSTIC RESULT

Operation procedure
Before starting self-diagnosis, start the engine and drive the vehicle at faster than 40 km/h (25 MPH) for longer
than 3 minutes. 
Display Item List
Refer to 

WT-56, "DTC Index"

DATA MONITOR

Display Item List

ACTIVE TEST

After completing the work below, perform an active test.
• Before performing self-diagnosis, register the transmitter IDs.
• Erase the self-diagnosis result history.

Test item list

ECU IDENTIFICATION

Low tire pressure warning control unit part number can be read.

Mode

FUNCTION DESCRIPTION

Work Support

In this mode, it is possible to make quick and accurate adjustments by following the instruc-
tions on the CONSULT-III display.

Self Diagnostic Result

Receives self-diagnosis results from the low tire pressure warning control unit, and indicates 
DTCs and the number of malfunctions.

Data Monitor

Receives input/output signals from the low tire pressure warning control unit and indicates 
and stores them to facilitate locating the causes of malfunctions.

Active Test

Sends command to the low tire pressure warning control unit to change output signals and 
check operation of output system.

ECU identification

Displays the part number of the low tire pressure warning control unit.

Monitor item (Unit)

Remarks

VHCL SPEED SE (km/h) or (MPH)

Vehicle speed

AIR PRESS FL (kPa), (kg/cm

2

) or (Psi)

Air pressure of tires

AIR PRESS FR (kPa), (kg/cm

2

) or (Psi)

AIR PRESS RR (kPa), (kg/cm

2

) or (Psi)

AIR PRESS RL (kPa), (kg/cm

2

) or (Psi)

ID REGST FL1

ID is registered: Done
ID is not registered: Yet

ID REGST FR1

ID REGST RR1

ID REGST RL1

WARNING LAMP

Low tire pressure warning lamp ON: On

Low tire pressure warning lamp OFF: Off

BUZZER

Combination meter buzzer ON: On

Combination meter buzzer OFF: Off

Test item

Condition

Details

BUZZER

Vehicle stopped

Check that the buzzer operates correctly.

WARN LAMP

The system is nor-
mal

Perform a test to check that the low tire pressure warning lamp illumi-
nates correctly.

WT-14

< DTC/CIRCUIT DIAGNOSIS >

C1704, C1705, C1706, C1707 LOW TIRE PRESSURE

DTC/CIRCUIT DIAGNOSIS

C1704, C1705, C1706, C1707 LOW TIRE PRESSURE

Description

INFOID:0000000005549601

The transmitter (1) is installed at the position of the air valve on the
road wheel (2). It measures the tire pressure and transmits the tire
pressure information by radio waves.

DTC Logic

INFOID:0000000005549602

DTC DETECTION LOGIC

DTC REPRODUCTION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE 

With CONSULT-III

1.

Turn the ignition switch ON.

CAUTION:

Never start the engine.

2.

Check the tire pressure for all wheels and adjust to the specified value. Refer to 

WT-80, "Tire Air Pres-

sure"

3.

Perform “AIR PRESSURE MONITOR” of self-diagnosis.

Is DTC “C1704”, “C1705”, “C1706”, or “C1707” detected?

YES

>> Perform trouble diagnosis. Refer to 

WT-14, "Diagnosis Procedure"

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005549603

1.

CHECK TIRE PRESSURE

Check the air pressure of all wheels. Refer to 

WT-80, "Tire Air Pressure"

Is the inspection result normal?

YES

>> Replace any malfunctioning transmitters.

NO

>> After adjusting the air pressure, GO TO 2.

2.

CHECK TIRE PRESSURE SIGNAL

With CONSULT-III

:Outside

JPEIC0013ZZ

DTC

Display Item

Malfunction detected condition

Possible causes

C1704

LOW PRESSURE FL

Front LH wheel pressure is or Less 182 kPa (1.86 kg/cm

2

, 26.4 psi) 

or less

Low tire pressure

C1705

LOW PRESSURE FR

Front RH wheel pressure is or less 182 kPa (1.86 kg/cm

2

, 26.4 psi) 

or less

C1706

LOW PRESSURE RR

Rear RH wheel pressure is or less 182 kPa (1.86 kg/cm

2

, 26.4 psi) 

or less

C1707

LOW PRESSURE RL

Rear LH wheel pressure is or less 182 kPa (1.86 kg/cm

2

, 26.4 psi) 

or less

 

 

 

 

 

 

 

Content   ..  1925  1926  1927  1928   ..