Infiniti F50. Manual - part 827

TROUBLE DIAGNOSIS FOR SYMPTOMS

WT-23

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Inspection 2: Warning Lamp Stays On When Ignition Switch Is Turned On.

EES000DM

DIAGNOSTIC PROCEDURE

1. 

CHECK CIRCUIT

●

Disconnect combination meter connector M43.

●

Check continuity between low tire pressure warning control unit
connector (body side) terminal No.3 and combination meter con-
nector (body side) terminal No.54.

OK or NG?

OK

>> GO TO 2.

NG

>> Repair or replace harness connector.

2. 

CHECK POWER SUPPLY CIRCUIT

●

Check voltage between low tire pressure warning control unit
terminal No.1 and ground.

●

Carry out self-diagnosis again.

Does battery voltage exit when ignition switch is turned “ON”?

YES

>> GO TO 3.

NO

>> Repair or replace power supply harness connector.

3. 

CHECK POWER SUPPLY CIRCUIT

1.

Ignition switch is turned "ON".

2.

Check voltage between low tire pressure warning control unit terminal 2 and ground.

Does battery voltage exist?

YES

>> GO TO 4.

NO

>> Repair or replace harness connector.

4. 

CHECK GROUND CIRCUIT

●

Check continuity between low tire pressure warning control unit
terminal No.11 and ground.

●

Carry out self-diagnosis again.

Does continuity exist?

YES

>> Replace low tire pressure warning control unit.

NO

>> Repair or replace ground circuit harness connector.

SEIA0060E

SEIA0058E

2 - Ground:

 Battery voltage

SEIA0057E

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TROUBLE DIAGNOSIS FOR SYMPTOMS

Inspection 3: Warning Lamp Blinks When Ignition Switch Is Turned On.

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NOTE:
If warning lamp blink below, the system is normal.
Blink Mode A

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This mode shows transmitter status is OFF-mode.
Carry out transmitter wake up operation. Refer to 

WT-14,

"Transmitter Wake Up Operation"

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DIAGNOSTIC PROCEDURE

1. 

CHECK CIRCUIT

●

Disconnect low tire pressure warning control unit connector.

●

Check continuity between low tire pressure warning control unit
connector (body side) terminal No.8 and ground.

Does continuity exist?

YES

>> Repair or replace harness connector.

NO

>> Replace low tire pressure warning control unit.

Inspection 4: Hazard Warning Lamp Blinks When Ignition Switch Is Turned On.

EES000DO

DIAGNOSTIC PROCEDURE

1. 

CHECK GROUND CIRCUIT

●

Check continuity between low tire pressure warning control unit
terminal No.11 and ground.

●

Carry out self-diagnosis again.

Does continuity exist?

YES

>> Replace low tire pressure warning control unit.

NO

>> Repair or replace ground circuit harness connector.

Inspection 5: “TIRE PRESSURE” Information In Display Does Not Exist.

EES000DP

DIAGNOSTIC PROCEDURE

1. 

CHECK FUSE

●

Check 10A fuse No. 21 for low tire pressure warning control unit.

Is fuse OK?

OK

>> GO TO 2.

NG

>> Replace fuse.

SEIA0347E

SEIA0053E

SEIA0057E

TROUBLE DIAGNOSIS FOR SYMPTOMS

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2. 

CHECK CIRCUIT

●

Ignition switch is turned “ON”.

●

Check voltage between low tire pressure warning control unit
connector M84 terminal 4 and ground.

Does battery voltage exist?

YES

>> GO TO 3.

NO

>> Check tire pressure warning control unit power supply

circuit for open or short.

3. 

CHECK CONTROL INPUT SIGNAL

●

Ignition switch is turned “ON”.

●

Check voltage between low tire pressure warning control unit
terminal 5 or 6 and ground.

Inspection results OK?

OK

>> Check multi function switch. 

NG

>> Check harness for open or short between low tire pres-

sure control unit and multi function switch.

Inspection 6: ID Registration Can Not Be Completed

EES000DQ

DIAGNOSTIC PROCEDURE

1. 

ID REGISTRATION (ALL)

●

Carry out ID registration of all transmitter.

●

Can ID registration of all transmitter be completed?

YES or NO?

YES

>> INSPECTION END.

NO

>> Go To Inspection 1: Transmitter or Low Tire Pressure Warning Control Unit.

4 - Ground:

Battery voltage

SEIA0052E

5, 6 -
Ground

: 0V (Min.) and 5V (Max.) are alternately 
repeated

SEIA0054E

WT-26

REMOVAL AND INSTALLATION

REMOVAL AND INSTALLATION

PFP:00000

Transmitter

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REMOVAL

1.

Deflate tire. Unscrew transmitter retaining nut and allow transmitter to fall into tire.

2.

Gently bounce tire so that transmitter falls to bottom of tire.
Place on tire changing machine and break both tire beads
ensuring that the transmitter remains at the bottom of the tire.

3.

Turn tire so that valve hole is at bottom and bounce so that
transmitter is near valve hole. Carefully lift tire onto turntable and
position valve hole (and transmitter) 270 degree from mounting/
dismounting head.

4.

Lubricate tire well and remove first side of the tire. Reach inside
the tire and remove the transmitter. Remove second side of tire.

INSTALLATION

1.

Put first side of tire onto rim.

2.

Mount transmitter on rim and tighten nut.

SEIA0047E

SEIA0048E

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