Infiniti FX35, FX50 (S51). Manual - part 1935

 

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Infiniti FX35, FX50 (S51). Manual - part 1935

 

 

LOW TIRE PRESSURE WARNING LAMP

WT-43

< DTC/CIRCUIT DIAGNOSIS >

C

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WT

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LOW TIRE PRESSURE WARNING LAMP

Description

INFOID:0000000005549645

Uses CAN communication from the low tire pressure warning control
unit to illuminate the low tire pressure warning lamp on the combina-
tion meter.

*: Tire pressure at each condition differs.

Component Function Check

INFOID:0000000005549646

1.

CHECK THE ILLUMINATION OF THE LOW TIRE PRESSURE WARNING LAMP

Check that the low pressure warning lamp is turned OFF after illuminating for approximately 1 second, when
the ignition switch is turned ON.
Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Perform trouble diagnosis. Refer to 

WT-43, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000005549647

1.

POWER SUPPLY AND GROUND CIRCUIT

Check power supply and ground circuit. Refer to 

WT-39, "Diagnosis Procedure"

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

PERFORM THE SELF-DIAGNOSIS

With CONSULT-III

Perform “AIR PRESSURE MONITOR” self-diagnosis.

Is DTC “U1000” detected?

YES

>> Perform trouble diagnosis for CAN communication system. Refer to 

WT-37, "Diagnosis Proce-

dure"

NO

>> GO TO 3.

3.

CHECK LOW TIRE PRESSURE WARNING LAMP SIGNAL

With CONSULT-III

1.

Turn the ignition switch ON.

CAUTION:

Never start engine.

2.

Select “DATA MONITOR” of “AIR PRESSURE MONITOR”.

NNEIC0001ZZ

Condition

Low tire pressure warning lamp

Ignition switch OFF.

OFF

Ignition switch ON.

Illuminates for 1 second, then turns OFF.

When tire pressure is low [Tire pressure is 182 kPa (1.86 kg/cm

2

, 26.4 psi)* 

or less

ON

Tire Pressure Monitoring System (TPMS) error

Flashes for 1 minute, then stays illuminated.

WT-44

< DTC/CIRCUIT DIAGNOSIS >

LOW TIRE PRESSURE WARNING LAMP

3.

Read out the value of “WARNING LAMP”. 

Does the data monitor display change from ON to OFF?

YES

>> GO TO 4.

NO

>> Replace the low tire pressure warning control unit. Refer to 

WT-76, "Exploded View"

4.

CHECK COMBINATION METER POWER SUPPLY CIRCUIT

Perform trouble diagnosis of the combination meter power supply circuit.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace error-detected parts.

TPMS CONTROL UNIT

WT-45

< ECU DIAGNOSIS INFORMATION >

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ECU DIAGNOSIS INFORMATION

TPMS CONTROL UNIT

Reference Value

INFOID:0000000005243114

VALUES ON THE DIAGNOSIS TOOL

CAUTION:

The reference values in the table below come from the control unit calculation data. The normal values
may in some cases be displayed even though the power circuit (harness) is open or shorted.

TERMINAL LAYOUT

PHYSICAL VALUES

Monitor item

Data monitor

Condition

Reference values for normal operation

VHCL SPEED SE

Drive the vehicle.

Vehicle speed (km/h) or (MPH)

AIR PRESS FL

Start the engine and drive at a speed of 
40 km/h (25 MPH) or more for 10 min-
utes.

Tire pressure (kg/cm

2

), (kPa) or (Psi)

AIR PRESS FR

AIR PRESS RR

AIR PRESS RL

ID REGST FL1

Ignition switch ON

ID registered: Done
ID 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

JSEIA0024ZZ

Terminal No.

(Wire color)

Description

Condition

Value (Approx.)

Signal name

Input/

Output

1

(P)

CAN-L

2

(L)

CAN-H

WT-46

< ECU DIAGNOSIS INFORMATION >

TPMS CONTROL UNIT

3

(O)

Ground

Tire pressure receiv-

er signal

Input

Ignition switch 

ON

Stand by status

(Approx. 4.5 V)

4

(L)

5

(R)

When signal is re-

ceived

(Approx. 4.5 V)

6

(P)

7

(SB)

Ground

Tire pressure receiv-

er power supply

Input

Ignition switch 

ON

Approx. 7 - 16 V

(Power is supplied to the receiver from the low tire pressure 

warning control unit.)

8

(R)

9

(GR)

10

(G)

12

(SB)

Ground

Tire pressure warn-

ing check switch

Output

Always

Approx. 7.6 - 14.6 V

15

(Y)

Ground

Ignition switch

Input

Ignition switch 

ON

Battery voltage

19

(W)

Ground

Tire pressure receiv-

er signal

(sensitivity)

Input

Ignition switch 

ON

Approx. 0.7 V

20

(BR)

21

(LG)

22

(V)

23

(B)

Ground

Tire pressure receiv-

er ground

0  V

24

(Y)

25

(W)

26

(P)

30

(LG)

Ground

Hazard lamp

Output

Hazard lamp 

switch ON

0 V

Hazard lamp 

switch OFF

Battery voltage

32

(B)

Ground

Ground

0 V

Terminal No.

(Wire color)

Description

Condition

Value (Approx.)

Signal name

Input/

Output

OCC3879D

OCC3880D

 

 

 

 

 

 

 

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