Content .. 900 901 902 903 ..

Infiniti Q45. Manual - part 902

TROUBLE DIAGNOSIS

WT-17

Low Tire Pressure Warning Control Unit Input/Output Signal Reference Values

NES000D4

LOW TIRE PRESSURE WARNING CONTROL UNIT INSPECTION TABLE
Specifications with CONSULT-II

Monitor item [Unit]

Content

Condition

Display value

VHCL SPEED SE [km/h] or
[mph]

Wheel speed

Vehicle stopped

0 km/h (0 MPH)

Vehicle running

CAUTION:

Check air pressure of tire under standard condition.

Approximately
equal to the indi-
cation on speed-
ometer (Inside of

10%)

AIR PRESS FL [kPa], [kg/

] or [psi]

Condition of front LH
tire air pressure

Just after the engine is started

0 kPa (0 kg/cm

0 psi)

Start engine and drive at 40 km/h (25 MPH) or more for
several minutes.

Approximately
equal to the indi-
cation on tire
gauge value

AIR PRESS FR [kPa], [kg/

] or [psi]

Condition of front RH
tire air pressure

Just after the engine is started

0 kPa (0 kg/cm

0 psi)

Start engine and drive at 40 km/h (25 MPH) or more for
several minutes.

Approximately
equal to the indi-
cation on tire
gauge value

AIR PRESS RR [kPa], [kg/

] or [psi]

Condition of rear RH
tire air pressure

Just after the engine is started

0 kPa (0 kg/cm

0 psi)

Start engine and drive at 40 km/h (25 MPH) or more for
several minutes.

Approximately
equal to the indi-
cation on tire
gauge value

AIR PRESS RL [kPa], [kg/

] or [psi]

Condition of rear LH tire
air pressure

Just after the engine is started

0 kPa (0 kg/cm

0 psi)

Start engine and drive at 40 km/h (25 MPH) or more for
several minutes.

Approximately
equal to the indi-
cation on tire
gauge value

ID REGST FL [DONE/YET]

Condition of front LH ID
registration

Transmitter ID registered

DONE

Transmitter ID unregistered

YET

ID REGST FR [DONE /YET]

Condition of front RH ID
registration

Transmitter ID registered

DONE

Transmitter ID unregistered

YET

ID REGST RR [DONE/YET]

Condition of rear RH ID
registration

Transmitter ID registered

DONE

Transmitter ID unregistered

YET

ID REGST RL [DONE/YET]

Condition of rear LH ID
registration

Transmitter ID registered

DONE

Transmitter ID unregistered

YET

WARNING LAMP [ON/OFF]

Low tire pressure warn-
ing lamp condition

Low tire pressure warning lamp: ON

Low tire pressure warning lamp: OFF

OFF

BUZZER [ON/OFF]

Condition of sound

Sound heard

Sound not heard

OFF

WT-18

TROUBLE DIAGNOSIS

Specifications Between Low Tire Pressure Warning Control Unit Terminals

LOW TIRE PRESSURE WARNING CONTROL UNIT CONNECTOR LAYOUT

Data are reference value and are measured between each terminal and ground.

CAUTION:

When using circuit tester or oscilloscope to measure voltage for inspection, be sure not to extend forcibly any connector ter-
minals.

SEIA0743E

Terminal

Wire

color

Item

Condition

Data (Approx.)

Y/G

Power supply
(Memory back-up)

Ignition switch: ON

Battery voltage

Ignition switch: OFF

Battery voltage

BR/W

Power supply

Ignition switch: ON

Battery voltage

Ignition switch: OFF

0 V

Low tire pressure warning lamp

Low tire pressure warning lamp: ON

5 - 8 V

Low tire pressure warning lamp: OFF

0 V

L/OR

Power supply (ACC)

Ignition switch: ACC

Battery voltage

Ignition switch: OFF

0 V

Display data line (+)

Ignition switch: ON

0 - 5 V (alternately repeated)

Display data line (-)

Ignition switch: ON

0 - 5 V (alternately repeated)

—

Display ground

—

Tire pressure warning check switch

Ignition switch: ON

5 V

Ignition switch: OFF

5 V

W/L

Hazard warning lamp switch

Ignition switch: ON

Battery voltage

Ignition switch: OFF

Battery voltage

OR/L

Vehicle speed

Vehicle speed: 40 km/h (25 MPH)

Ground

Always

0 V

BR/Y

Data link connector (RX)

—

G/B

Data link connector (TX)

—

Antenna

—

ELF1080D

TROUBLE DIAGNOSIS

WT-19

CONSULT-II Function (AIR PRESSURE MONITOR)

NES000D5

FUNCTION

CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.

CONSULT-II SETTING PROCEDURE

Refer to

GI-36, "CONSULT-II Start Procedure"

WORK SUPPORT MODE
Operation Procedure

Perform “CONSULT-II Start Procedure”. Refer to

GI-36, "CONSULT-II Start Procedure"

Touch “WORK SUPPORT”.

Select from “SELECT WORK ITEM”, screen of work support
mode is displayed.

ID Regist

Refer to

WT-24, "ID Registration Procedure"

SELF-DIAG RESULT MODE
Operation Procedure

Perform “CONSULT-II Start Procedure”. Refer to

GI-36, "CONSULT-II Start Procedure"

With engine at idle, touch “SELF-DIAG RESULTS”.
Display shows malfunction experienced since the last erasing operation.

NOTE:
The details for “TIME” are as follows:

●

“0”: Error currently detected with low tire pressure warning control unit.

●

Except for “0”: Error detected in the past and memorized with low tire pressure warning control unit.
Detects frequency of driving after DTC occurs (frequency of turning ignition switch “ON/OFF”).

Diagnostic test mode

Function

Reference

page

Work support

●

This mode enables a technician to adjust some devices faster and more accu-
rately by following the indications on CONSULT-II.

WT-19

Self-diagnostic results

●

Self-diagnostic results can be read and erased quickly.

WT-19

Data monitor

●

Input/Output data in the low tire pressure warning control unit can be read.

WT-21

ECU part number

●

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

WT-21

SEIA0772E

WT-20

TROUBLE DIAGNOSIS

Display Item List

NOTE:
Before performing the self-diagnosis, be sure to register the ID, or else the actual malfunction location may be different from that dis-
played on CONSULT-II.

How to Erase Self-diagnostic Results

Perform applicable inspection of malfunctioning item and then repair or replace.

Turn ignition switch “ON” and select “SELF-DIAG RESULTS” mode for “AIR PRESSURE MONITOR” with
CONSULT-II.

Touch “ERASE” on CONSULT-II screen to erase DTC memory.

CAUTION:

If memory cannot be erased, perform applicable diagnosis.

Items

(CONSULT-II screen terms)

Diagnostic item is detected when...

Check item

FLAT TIRE FL

Front LH tire pressure drops to 186 kPa (1.86 kg/cm

, 27 psi) or less

WT-26, "Inspections

Before Trouble Diag-

nosis"

FLAT TIRE FR

Front RH tire pressure drops to 186 kPa (1.86 kg/cm

, 27 psi) or less

FLAT TIRE RR

Rear RH tire pressure drops to 186 kPa (1.86 kg/cm

, 27 psi) or less

FLAT TIRE RL

Rear LH tire pressure drops to 186 kPa (1.86 kg/cm

, 27 psi) or less

[NO DATA] FL

Data from front LH transmitter cannot be received.

WT-31, "Transmitter

(NO DATA)"

[NO DATA] FR

Data from front RH transmitter cannot be received.

[NO DATA] RR

Data from rear RH transmitter cannot be received.

[NO DATA] RL

Data from rear LH transmitter cannot be received.

[CHECKSUM ERR] FL

Checksum data from front LH transmitter is malfunctioning.

[CHECKSUM ERR] FR

Checksum data from front RH transmitter is malfunctioning.

[CHECKSUM ERR] RR

Checksum data from rear RH transmitter is malfunctioning.

[CHECKSUM ERR] RL

Checksum data from rear LH transmitter is malfunctioning.

[PRESSDATA ERR] FL

Air pressure data from front LH transmitter is malfunction.

WT-35, "Transmitter

(PRESSDATA ERR)"

[PRESSDATA ERR] FR

Air pressure data from front RH transmitter is malfunction.

[PRESSDATA ERR] RR

Air pressure data from rear RH transmitter is malfunction.

[PRESSDATA ERR] RL

Air pressure data from rear LH transmitter is malfunction.

[CODE ERR] FL

Function code data from front LH transmitter is malfunctioning.

[CODE ERR] FR

Function code data from front RH transmitter is malfunctioning.

[CODE ERR] RR

Function code data from rear RH transmitter is malfunctioning.

[CODE ERR] RL

Function code data from rear LH transmitter is malfunctioning.

[BATT VOLT LOW] FL

Battery voltage of front LH transmitter drops.

[BATT VOLT LOW] FR

Battery voltage of front RH transmitter drops.

[BATT VOLT LOW] RR

Battery voltage of rear RH transmitter drops.

[BATT VOLT LOW] RL

Battery voltage of rear LH transmitter drops.

RECEIVER ID NO REG

No ID registration has been made to the low tire pressure warning control unit.

WT-48, "ID Registra-

tion Cannot Be Com-

pleted"

Content .. 900 901 902 903 ..