Infiniti QX56 (Z62). Manual - part 1375

C1755, C1756, C1757, C1758 POOR RECEIVING CONDITIONS

WT-47

< DTC/CIRCUIT DIAGNOSIS >

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C1755, C1756, C1757, C1758 POOR RECEIVING CONDITIONS

DTC Logic

INFOID:0000000006225522

DTC DETECTION LOGIC

CAUTION:

If DTC C1755, C1756, C1757, or C1758 is detected along with, C1708, C1709, C1710, or C1711 first diag-
nose C1755, C1756, C1757, or C1758.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION 

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.

Stop the vehicle.

3.

Perform self-diagnosis for “AIR PRESSURE MONITOR”.

Is DTC “C1755”, “C1756”, “C1757”, or “C1758 ” detected?

YES

>> Proceed to 

WT-47, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006225523

1.

TRANSMITTER ID REGISTRATION

Perform transmitter ID registration. Refer to 

WT-29, "Work Procedure"

.

Is transmitter ID registration completed?

YES

>> GO TO 2.

NO

>> Change the work location and perform ID registration again, then proceed to 

WT-60,

"Diagnosis Procedure"

.

2.

CHECK TIRE PRESSURE SIGNAL

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.

Stop the vehicle.

3.

Select “DATA MONITOR” for “AIR PRESSURE MONITOR” with CONSULT-III.

4.

Within 5 minutes after vehicle stopped, check that the tire pressures match the standard value.

DTC

Display Item

Malfunction detected condition

Possible causes

C1755

PR RECEIV COND FL

The data signal from the front LH wheel transmitter cannot be 
detected due to external electromagnetic interference for 10 
minutes or more.
(DTC C1708 is displayed at the same time.)

External electromagnetic 
interference

C1756

PR RECEIV COND FR

The data signal from the front RH wheel transmitter cannot be 
detected due to external electromagnetic interference for 10 
minutes or more.
(DTC C1709 is displayed at the same time.)

C1757

PR RECEIV COND RR

The data signal from the rear RH wheel transmitter cannot be 
detected due to external electromagnetic interference for 10 
minutes or more.
(DTC C1710 is displayed at the same time.)

C1758

PR RECEIV COND RL

The data signal from the rear LH wheel transmitter cannot be 
detected due to external electromagnetic interference for 10 
minutes or more.
(DTC C1711 is displayed at the same time.)

Monitor item

Displayed value

AIR PRESS FL

Approximately equal to the indication on tire gauge value for front LH tire

AIR PRESS FR

Approximately equal to the indication on tire gauge value for front RH tire

WT-48

< DTC/CIRCUIT DIAGNOSIS >

C1755, C1756, C1757, C1758 POOR RECEIVING CONDITIONS

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Change the work location, then GO TO 1.

3.

CHECK SELF-DIAGNOSIS RESULTS

With CONSULT-III

1.

Erase the self-diagnosis memory for the low tire pressure warning control unit.

2.

Turn ignition switch OFF, and wait for 10 seconds or more.

3.

Perform “DTC CONFIRMATION PROCEDURE” (self-diagnosis) again. Refer to 

WT-47, "DTC Logic"

.

Are DTC “C1755”, “C1756”, “C1757”, or “C1758” and “C1708”, “C1709”, “C1710”, or “C1711” detected?

YES

>> Change the work location, then GO TO 1.

NO

>> Check the input/output signal values. Refer to 

WT-14, "Reference Value"

. 

AIR PRESS RR

Approximately equal to the indication on tire gauge value for rear RH tire

AIR PRESS RL

Approximately equal to the indication on tire gauge value for rear LH tire

Monitor item

Displayed value

U1000 CAN COMM CIRCUIT

WT-49

< DTC/CIRCUIT DIAGNOSIS >

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U1000 CAN COMM CIRCUIT

Description

INFOID:0000000006225524

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.
Each control unit communicates data but selectively reads required data only.

DTC Logic

INFOID:0000000006225525

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION

With CONSULT-III

1.

Drive for several minutes at a speed of 40 km/h (25 MPH) or more.

2.

Stop the vehicle.

3.

Perform self-diagnosis for “AIR PRESSURE MONITOR”.

Is DTC “U1000” detected?

YES

>> Proceed to 

WT-49, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006225526

Proceed to 

LAN-27, "CAN COMMUNICATION SYSTEM : CAN System Specification Chart"

.

DTC

Display item

Malfunction detected condition

Possible cause

U1000

CAN COMM CIRCUIT

Low tire pressure warning control unit is 
not communicating CAN communication 
signal for 2 seconds or more.

• CAN communication malfunction
• Malfunction of low tire pressure warn-

ing control unit

WT-50

< DTC/CIRCUIT DIAGNOSIS >

U1010 CONTROL UNIT (CAN)

U1010 CONTROL UNIT (CAN)

Description

INFOID:0000000006225527

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.
Each control unit communicates data but selectively reads required data only.

DTC Logic

INFOID:0000000006225528

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION

With CONSULT-III

1.

Drive for several minutes at a speed of 40 km/h (25 MPH) or more.

2.

Stop the vehicle.

3.

Perform self-diagnosis for “AIR PRESSURE MONITOR”.

Is DTC “U1010” detected?

YES >> Proceed 

to 

WT-50, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006225529

1.

CHECK LOW TIRE PRESSURE WARNING CONTROL UNIT

Check low tire pressure warning control unit harness connector for disconnection or deformation.
Is the inspection result normal? 

YES

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

WT-65, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.

DTC

Display item

Malfunction detected condition

Possible cause

U1010

CONTROL UNIT (CAN)

Detecting error during the initial diagno-
sis of CAN controller of low tire pressure 
warning control unit.

Malfunction of low tire pressure warning 
control unit