Infiniti FX35, FX50 (S51). Manual - part 1931

C1728 RECEIVER ID

WT-27

< DTC/CIRCUIT DIAGNOSIS >

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F

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A

B

WT

N

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P

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK TIRE PRESSURE RECEIVER POWER SUPPLY CIRCUIT

1.

Disconnect the tire pressure receiver harness connector.

2.

Check the voltage between the tire pressure receiver harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace the malfunctioning harness or connector. 

3.

CHECK TIRE PRESSURE RECEIVER GROUND CIRCUIT

1.

Disconnect the low tire pressure warning control unit harness connector.

2.

Check the continuity between the low tire pressure warning control unit harness connector and tire pres-
sure receiver harness connector.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace the malfunctioning harness or connector. 

4.

CHECK LOW TIRE PRESSURE WARNING CONTROL UNIT CIRCUIT

Check the low tire pressure warning control unit circuit. Refer to 

WT-32, "Diagnosis Procedure"

. 

Connector

Terminal

—

Standard

M96

3

Ground

Stand by status

(Approx. 4.5 V)

4

5

6

Connector

Terminal

—

Standard

M96

3

Ground

When signal is re-

ceived

(Approx. 4.5 V)

4

5

6

OCC3879D

OCC3880D

Tire pressure receiver

—

Voltage

Connector

Terminal

E53 (Front LH)

1

Ground

7 - 16 V

E19 (Front RH)

B43 (Rear LH)

B251 (Rear RH)

Low tire pressure warning control unit

Tire pressure receiver

Continuity

Connector

Terminal

Connector

Terminal

M96

26

E53 (Front LH)

4

Existed

25

E19 (Front RH)

24

B43 (Rear LH)

23

B251 (Rear RH)

WT-28

< DTC/CIRCUIT DIAGNOSIS >

C1728 RECEIVER ID

Is the low tire pressure warning control unit circuit normal?

YES

>> Replace the tire pressure receiver.

NO

>> Repair or replace error-detected parts.

C1729 VEHICLE SPEED SIG ERR

WT-29

< DTC/CIRCUIT DIAGNOSIS >

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C1729 VEHICLE SPEED SIG ERR

Description

INFOID:0000000005549620

Uses CAN communications from the ABS actuator and electric unit (control unit) to receive the vehicle speed
signal, and activates the Tire Pressure Monitoring System (TPMS) when the vehicle speed is 40 km/h
(25MPH) or more.

DTC Logic

INFOID:0000000005549621

DTC logic

DTC REPRODUCTION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

With CONSULT-III

1.

Drive for several minutes at a speed of 40 km/h (25MPH) or more, then stop the vehicle.

2.

Perform “AIR PRESSURE MONITOR self-diagnosis”.

Is DTC “C1729” detected?

YES

>> Perform trouble diagnosis. Refer to 

WT-29, "Diagnosis Procedure"

. 

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005549622

1.

PERFORM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS

With CONSULT-III

Perform “ABS” self-diagnosis.

Is DTC detected?

YES

>> Check malfunctioning circuit.

NO

>> GO TO 2.

2.

PERFORM THE SELF-DIAGNOSIS

With CONSULT-III

Perform “AIR PRESSURE MONITOR” self-diagnosis.
Is DTC “C1729” detected?

YES

>> Replace the low tire pressure warning control unit. 

NO

>> GO TO 3.

3.

CHECK INFORMATION

With CONSULT-III

Select “DATA MONITOR” of “AIR PRESSURE MONITOR” and check the input/output values. Refer to 

WT-45,

"Reference Value"

. 

Is the inspection result normal?

YES

>> Check pin terminal and connection of each harness connector for malfunctioning conditions. 

NO

>> Replace the low tire pressure warning control unit. 

DTC

Display Item

Malfunction detected condition

Possible causes

C1729

VHCL SPEED SIG ERR

Speed signal is not detected.

• CAN communication malfunction
• Low tire pressure warning control 

unit malfunction

• ABS actuator and electric unit 

(control unit) malfunction

WT-30

< DTC/CIRCUIT DIAGNOSIS >

C1750, C1751, C1752, C1753 RECEIVER

C1750, C1751, C1752, C1753 RECEIVER

Description

INFOID:0000000005549623

The front (A) tire pressure receiver (1) and rear (B) tire pressure
receiver (2) receive the tire pressure signal by radio waves from the
transmitter at each wheel, and transmit the tire pressure signal to the
low tire pressure warning control unit.

DTC Logic

INFOID:0000000005549624

DTC DETECTION LOGIC

DTC REPRODUCTION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

With CONSULT-III

1.

Drive for 3 minutes at a speed of 40 km/h (25 MPH) or more, then drive normally for 10 minutes.

2.

Perform “AIR PRESSURE MONITOR” self-diagnosis.

Is DTC “C1750”, “C1751”, “C1752”, or “C1753” detected?

YES

>> Perform trouble diagnosis. Refer to 

WT-30, "Diagnosis Procedure"

. 

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005549625

1.

CHECK TIRE PRESSURE RECEIVER INPUT SIGNAL

1.

Turn the ignition switch ON.

CAUTION:

Never start engine. 

JSEIA0007ZZ

DTC

Display Item

Malfunction detected condition

Possible causes

C1750

[RECEIVER ERR] FL

The front LH tire pressure receiver dose not re-
ceive a signal.

Tire pressure receiver mal-
function

C1751

[RECEIVER ERR] FR

The front RH tire pressure receiver dose not re-
ceive a signal.

C1752

[RECEIVER ERR] RR

The rear RH tire pressure receiver dose not re-
ceive a signal.

C1753

[RECEIVER ERR] RL

The rear LH tire pressure receiver dose not re-
ceive a signal.