Infiniti FX35, FX50 (S51). Manual — part 1933
C1755, C1756, C1757, C1758 POOR RECEIVING CONDITIONS
WT-35
< DTC/CIRCUIT DIAGNOSIS >
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C1755, C1756, C1757, C1758 POOR RECEIVING CONDITIONS
Description
INFOID:0000000005549630
A DTC is detected if the radio signal output from the transmitter is interrupted by external electromagnetic
interference for 10 minutes or more.
DTC Logic
INFOID:0000000005549631
DTC logic
CAUTION:
If DTC C1755, C1756, C1757, or C1758 (low communication performance) is detected along with,
C1708, C1709, C1710, or C1711 (no transmitter data) first diagnose C1755, C1756, C1757, or C1758 (low
communications performance).
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 “C1755”, “C1756”, “C1757”, or “C1758 ” detected?
YES
>> Perform trouble diagnosis. Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005549632
1.
REGISTER THE TRANSMITTER ID
Perform transmitter ID registration for all wheels. Refer to
WT-7, "ID REGISTRATION PROCEDURE : Trans-
mitter ID Registration Procedure"
Is ID registration for all wheels completed?
YES
>> GO TO 2.
NO
>> Change the work location and perform ID registration again, then perform trouble diagnosis. Refer
to
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.
Within 5 minutes, select “DATA MONITOR” of “AIR PRESSURE MONITOR”.
3.
Display the following: “AIR PRESS FL”, “AIR PRESS FR”, “AIR PRESS RR”, and “AIR PRESS RL”.
4.
Check that the displayed tire pressures is the specified 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. (DTC
C1708 is displayed at the same time.)
External electromagnet-
ic interference
C1756
PR RECEIV COND FR
The data signal from the front RH wheel transmitter cannot be
detected due to external electromagnetic interference. (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. (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. (DTC
C1711 is displayed at the same time.)
WT-36
< 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 THE DIAGNOSIS RESULTS
With CONSULT-III
1.
Erase the self-diagnosis memory of the low tire pressure warning control unit.
2.
Turn ignition switch OFF, and wait for 10 seconds or more.
3.
Perform “AIR PRESSURE MONITOR” self-diagnosis.
Are DTC “C1755”, “C1756”, “C1757”, or “C1758” and “C1708”, “C1709”, “C1710”, or “C1711” detected?
YES
>> Change the work location, then GO TO 1.
NO
>> GO TO 4.
4.
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.
Within 5 minutes, select “DATA MONITOR” of “AIR PRESSURE MONITOR”.
3.
Display the following: “AIR PRESS FL”, “AIR PRESS FR”, “AIR PRESS RR”, and “AIR PRESS RL”.
4.
Check that the tire pressures is the specified value.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Change the work location, then GO TO 1.
Monitor item
Condition
Displayed value
AIR PRESS FL
Drive for 3 minutes at a speed of 40 km/h (25MPH) or more,
then drive normally for 10 minutes.
Air pressure of tire pressure
AIR PRESS FR
AIR PRESS RR
AIR PRESS RL
Monitor item
Condition
Displayed value
AIR PRESS FL
Drive for 3 minutes at a speed of 40 km/h (25MPH) or more,
then drive normally for 10 minutes.
Air pressure of tire pressure
AIR PRESS FR
AIR PRESS RR
AIR PRESS RL
U1000 CAN COMM CIRCUIT
WT-37
< DTC/CIRCUIT DIAGNOSIS >
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U1000 CAN COMM CIRCUIT
Description
INFOID:0000000005549633
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:0000000005549634
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC REPRODUCTION PROCEDURE
With CONSULT-III
1.
Turn the ignition switch OFF to ON.
2.
Perform “AIR PRESSURE MONITOR” self-diagnosis.
Is DTC “U1000” detected?
YES
>> Proceed to trouble diagnosis procedure. Refer to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005549635
1.
PERFORM SELF-DIAGNOSIS
With CONSULT-III
Perform “AIR PRESSURE MONITOR” self-diagnosis.
Is DTC “U1000” detected?
YES
>> CAN specification chart. Refer to
LAN-29, "CAN System Specification Chart"
NO
>> INSPECTION END
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-38
< DTC/CIRCUIT DIAGNOSIS >
U1010 CONTROL UNIT (CAN)
U1010 CONTROL UNIT (CAN)
Description
INFOID:0000000005549636
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:0000000005549637
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC REPRODUCTION PROCEDURE
With CONSULT-III
1.
Turn the ignition switch OFF to ON.
2.
Perform “AIR PRESSURE MONITOR” self-diagnosis.
Is DTC “U1010” detected?
YES
>> Proceed to trouble diagnosis procedure. Refer to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005549638
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
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
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