2008 INFINITI QX56 air condition

WT-14
< COMPONENT DIAGNOSIS >
C1708 - C1711 DATA FROM TRANSMITTER NOT BEING RECEIVED
COMPONENT DIAGNOSIS
C1708 - C1711 DATA FROM TRANSMITTER NOT BEING RECEIVED
DescriptionINFOID:0000000001735380
Tire pressure data for one or more transmitters is not being received by the BCM.
DTC LogicINFOID:0000000001735381
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.ID REGISTRATION AND VEHICLE DRIVING
1. Carry out ID registration of all transmitters.
2. Drive at a speed of 40 km/h (25 MPH) or more fo r 3 minutes, and then drive the vehicle at any speed for
10 minutes.
3. Check all tire pressures with CONSULT-III within 5 minutes.
Does
“DATA MONITOR ITEM” display tire pressure as normal without any warning lamp?
YES >> Inspection End.
NO >> Refer to WT-14, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001735382
FLASH CODE NO. 21, 22, 23 OR 24 (DTC C1708, C1709, C1710 OR C1711)
1.CHECK BCM
Drive for several minutes. Check all tire pressures with CONSULT-III.
Are all tire pressures displayed as 0 kPa?
YES >> GO TO 2
NO >> GO TO 3
2.CHECK TIRE PRESSURE RECEIVER CONNECTOR
Check tire pressure receiver connector for damage or loose connection.
Is tire pressure receiver connector damaged or loose?
YES >> Repair or replace tire pressure receiver connector.
NO >> Replace BCM, then GO TO 3. Refer to BCS-55, "
Removal and Installation".
3.PERFORM ID REGISTRATION
Carry out ID registration of all transmitters. Refer to WT-6, "
ID Registration Procedure".
Is there a tire that cannot register ID?
YES >> Replace malfunctioning transmitter, then GO TO 5. Refer to WT-49, "Transmitter (Pressure Sen-
sor)".
NO >> GO TO 4
4.DRIVE VEHICLE
1. Drive at a speed of 40 km/h (25 MPH) or more for several minutes without stopping.
2. Check all tire pressures with CONSULT-III within 15 minutes after vehicle speed becomes 17 km/h (11 MPH).
Does
“DATA MONITOR ITEM” display tire pressure as normal without any warning lamp?
DTC CONSULT-III DTC detecting condition
C1708 [NO - DATA] - FL Data from FL transmitter cannot be received.
C1709 [NO - DATA] - FR Data from FR transmitter cannot be received.
C1710 [NO - DATA] - RR Data from RR transmitter cannot be received.
C1711 [NO - DATA] - RL Data from RL transmitter cannot be received.
Revision: March 2010 2008 QX56

WT-18
< COMPONENT DIAGNOSIS >
C1716 - C1719 TRANSMITTER PRESSURE MALFUNCTION
C1716 - C1719 TRANSMITTER PRESSURE MALFUNCTION
DescriptionINFOID:0000000001735388
Air pressure data from one or more transmitters is out of range.
DTC LogicINFOID:0000000001735389
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.ID REGISTRATION AND VEHICLE DRIVING
1. Carry out ID registration of all transmitters.
2. Drive at a speed of 40 km/h (25 MPH) or more fo r 3 minutes, and then drive the vehicle at any speed for
10 minutes.
3. Check all tire pressures with CONSULT-III within 5 minutes.
Does
“DATA MONITOR ITEM” display tire pressure as normal without any warning lamp?
YES >> Inspection End.
NO >> Refer to WT-18, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001735390
FLASH CODE NO. 35, 36, 37 OR 38 (DTC C1716, C1717, C1718 OR C1719)
1.CHECK ALL TIRE PRESSURES
Check all tire pressures. Refer to WT-51, "
Tire".
Are there any tires with pressure of 64 psi or more?
YES >> Adjust tire pressure to specified value.
NO >> GO TO 2
2.ID REGISTRATION AND VEHICLE DRIVING
1. Carry out ID registration of all transmitters. Refer to WT-6, "
ID Registration Procedure".
2. Drive at a speed of 40 km/h (25 MPH) or more for several minutes without stopping.
3. Check all tire pressures with CONSULT-III within 15 minutes after vehicle speed becomes 17 km/h (11
MPH).
Does
“DATA MONITOR ITEM” display 64 psi or more?
YES >> Replace transmitter. Refer to WT-49, "Transmitter (Pressure Sensor)". GO TO 3.
NO >> GO TO 3
3.ID REGISTRATION AND VEHICLE DRIVING
1. Carry out ID registration of all transmitters.
2. Drive at a speed of 40 km/h (25 MPH) or more fo r 3 minutes, and then drive the vehicle at any speed for
10 minutes.
3. Check all tire pressures with CONSULT-III within 5 minutes.
Does
“DATA MONITOR ITEM” display tire pressure as normal without any warning lamp?
YES >> Inspection End.
NO >> Proceed to the inspection applicable to DTC.
Special Repair RequirementINFOID:0000000004291543
Perform preliminary check. Refer to WT-5, "Preliminary Check".
DTCCONSULT - III DTC detecting condition
C1716 [PRESSDATA - ERR] FL Air pressure data from FL transmitter is malfunctioning.
C1717 [PRESSDATA - ERR] FR Air pressure data from FR transmitter is malfunctioning.
C1718 [PRESSDATA - ERR] RR Air pressure data from RR transmitter is malfunctioning.
C1719 [PRESSDATA - ERR] RL Air pressure data from RL transmitter is malfunctioning.
Revision: March 2010 2008 QX56

C1729 VEHICLE SPEED SIGNALWT-19
< COMPONENT DIAGNOSIS >
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C1729 VEHICLE SPEED SIGNAL
DescriptionINFOID:0000000001735392
The vehicle speed signal is not being detected by the BCM.
DTC LogicINFOID:0000000001735393
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
1. On “SELECT DIAG MODE”, select the “SELF-DIAG RESULT” screen.
2. Check display contents on "SELF DIAG RESULT" screen.
Is the
“CAN COMM CIRCUIT” displayed in the self-diagnosis display?
YES >> Refer to WT-19, "Diagnosis Procedure".
NO >> Inspection end.
Diagnosis ProcedureINFOID:0000000001735394
FLASH CODE NO. 52 (DTC C1729)
1.CHECK SELF-DIAGNOSTIC RESULTS
1. On “SELECT DIAG MODE”, select the “SELF-DIAG RESULT” screen.
2. Check display contents on "SELF DIAG RESULT" screen.
Is the
“CAN COMM CIRCUIT” displayed in the self-diagnosis display?
YES >> Perform trouble diagnosis for CAN communication system. Refer to LAN-4.
NO >> Check combination meter. Refer to MWI-5
.
Special Repair RequirementINFOID:0000000004291544
Perform preliminary check. Refer to WT-5, "Preliminary Check".
DTCCONSULT - III DTC detecting condition
C1729 VHCL SPEED SIG ERR Vehicle speed signal is in error.
Revision: March 2010 2008 QX56

WT-20
< COMPONENT DIAGNOSIS >
C1735 IGNITION SIGNAL
C1735 IGNITION SIGNAL
DescriptionINFOID:0000000004291539
The BCM monitors the IGN ON signal on the CAN line and compares it to it’s direct IGN ON signal. When
these two signals do not match, the BCM sets C1735.
DTC LogicINFOID:0000000004291540
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
1. On SELECT DIAG MODE, select the SELF-DIAG RESULT screen.
2. Check display contents on SELF DIAG RESULT screen.
Is C1735 displayed in the self-diagnosis display?
YES >> Refer to WT-20, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis ProcedureINFOID:0000000004291541
MALFUNCTION CODE NO. 54 (DTC C1735)
1.CAN IGNITION SIGNAL
Check BCM IGN RLY signal with CONSULT-III. Refer to WT-21, "
Reference Value".
Are the inspection results normal with the ignition switch ON?
YES >> GO TO 2.
NO >> Check CAN system. Refer to LAN-14, "
Trouble Diagnosis Flow Chart".
2.BCM POWER SUPPLY
Check BCM power supply (ignition ON). Refer to BCS-32, "
Diagnosis Procedure".
Is the power supply with the ignition switch ON normal?
YES >> GO TO 3.
NO >> Repair power supply as necessary.
3.DRIVE VEHICLE
Clear DTC and then test drive the vehicle and check the low tire pressure warning lamp.
Does the vehicle operate without any low tire pressure warning lamp?
YES >> Inspection End.
NO >> Replace BCM. Refer to BCS-55, "
Removal and Installation".
Special Repair RequirementINFOID:0000000004291545
Perform preliminary check. Refer to WT-5, "Preliminary Check".
DTCCONSULT - III DTC detecting condition
C1735 IGNITION SIGNAL LINE - BCM/TPMS BCM has detected a mismatch between IGN ON signals.
Revision: March 2010 2008 QX56

BCM (BODY CONTROL MODULE)WT-21
< ECU DIAGNOSIS >
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ECU DIAGNOSIS
BCM (BODY CONTROL MODULE)
Reference ValueINFOID:0000000004291536
VALUES ON THE DIAGNOSIS TOOL
Monitor Item Condition Value/Status
AIR COND SW A/C switch OFF
OFF
A/C switch ON ON
AUT LIGHT SYS Outside of the room is dark
OFF
Outside of the room is bright ON
AUTO LIGHT SW Lighting switch OFF
OFF
Lighting switch AUTO ON
BACK DOOR SW Back door closed
OFF
Back door opened ON
CDL LOCK SW Door lock/unlock switch does not operate
OFF
Press door lock/unlock switch to the LOCK side ON
CDL UNLOCK SW Door lock/unlock switch does not operate
OFF
Press door lock/unlock switch to the UNLOCK side ON
DOOR SW-AS Front door RH closed
OFF
Front door RH opened ON
DOOR SW-DR Front door LH closed
OFF
Front door LH opened ON
DOOR SW-RL Rear door LH closed
OFF
Rear door LH opened ON
DOOR SW-RR Rear door RH closed
OFF
Rear door RH opened ON
ENGINE RUN Engine stopped
OFF
Engine running ON
FR FOG SW Front fog lamp switch OFF
OFF
Front fog lamp switch ON ON
FR WASHER SW Front washer switch OFF
OFF
Front washer switch ON ON
FR WIPER LOW Front wiper switch OFF
OFF
Front wiper switch LO ON
FR WIPER HI Front wiper switch OFF
OFF
Front wiper switch HI ON
FR WIPER INT Front wiper switch OFF
OFF
Front wiper switch INT ON
FR WIPER STOP Any position other than front wiper stop position
OFF
Front wiper stop position ON
HAZARD SW When hazard switch is not pressed
OFF
When hazard switch is pressed ON
LIGHT SW 1ST Lighting switch OFF
OFF
Lighting switch 1st ON
Revision: March 2010 2008 QX56

WW-2
Reference Value .....................................................55
Terminal Layout ......................................................57
Physical Values ......................................................57
Wiring Diagram .......................................................62
Fail Safe .................................................................65
DTC Index ..............................................................67
SYMPTOM DIAGNOSIS .............................68
WIPER AND WASHER SYSTEM SYMPTOMS
...
68
Symptom Table ................................................... ...68
NORMAL OPERATING CONDITION ................71
Description ........................................................... ...71
FRONT WIPER DOES NOT OPERATE ............72
Description ........................................................... ...72
Diagnosis Procedure ..............................................72
PRECAUTION .............................................74
PRECAUTION ... .............................................. ...74
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. ...
74
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ..................................
74
ON-VEHICLE REPAIR ................................76
FRONT WIPER ARM ...................................... ...76
Front Wiper Arms ................................................. ...76
FRONT WIPER DRIVE ASSEMBLY .................77
Wiper Motor and Linkage ..................................... ...77
FRONT WASHER TUBE ...................................78
Washer Tube Layout ............................................ ...78
FRONT WASHER NOZZLE ..............................79
Washer Nozzle Adjustment .................................. ...79
WASHER TANK ................................................80
Washer Fluid Reservoir ..........................................80
FRONT WASHER PUMP ..................................81
Washer Motor ...................................................... ...81
FRONT WIPER AND WASHER SWITCH .........82
Wiper and Washer Switch .................................... ...82
REAR WIPER AND WASHER SYSTEM ...........83
Rear Wiper Arm ................................................... ...83
Rear Wiper Motor ....................................................83
Rear Washer Nozzle Adjustment ............................84
Rear Washer Tube Layout ......................................85
Rear Washer Nozzle ...............................................85
Rear Wiper and Washer Switch ..............................85
Washer Fluid Reservoir ....................................... ...86
Washer Motor .........................................................86
Revision: March 2010 2008 QX56

DIAGNOSIS AND REPAIR WORKFLOWWW-3
< BASIC INSPECTION >
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BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work FlowINFOID:0000000001735564
DETAILED FLOW
1. LISTEN TO CUSTOMER COMPLAINT
Listen to customer complaint. Get detailed information about the conditions and environment when the symp-
tom occurs.
>> GO TO 2
2. VERIFY THE SYMPTOM WITH OPERATIONAL CHECK
Verify the symptom with operational check. Refer to WW-13, "
Diagnosis Description".
>> GO TO 3
3. GO TO APPROPRIATE TROUBLE DIAGNOSIS
Go to appropriate trouble diagnosis. Refer to WW-68, "
Symptom Table".
>> GO TO 4
4. REPAIR OR REPLACE
Repair or replace the specific parts.
>> GO TO 5
5. FINAL CHECK
Final check.
Is inspection result normal?
YES >> Inspection End
NO >> Refer to GI-38, "
Intermittent Incident".
Revision: March 2010 2008 QX56

DIAGNOSIS SYSTEM (BCM)WW-11
< FUNCTION DIAGNOSIS >
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DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Fu nction (BCM - COMMON ITEM)INFOID:0000000004874860
APPLICATION ITEM
CONSULT-III performs the following functions via CAN communication with BCM.
SYSTEM APPLICATION
BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system selection items.
WIPER
WIPER : CONSULT-III Function (BCM - WIPER)INFOID:0000000004874861
WORK SUPPORT
Diagnosis mode Function Description
WORK SUPPORT Changes the setting for each system function.
SELF-DIAG RESULTS Displays the diagnosis results judged by BCM. Refer to BCS-50, "
DTCIndex".
CAN DIAG SUPPORT MNTR Monitors the reception status of CAN communication viewed from BCM.
DATA MONITOR The BCM input/output signals are displayed.
ACTIVE TEST The signals used to activate each device are forcibly supplied from BCM.
ECU IDENTIFICATION The BCM pa rt number is displayed.
CONFIGURATION • Enables to read and save the vehicle specification.
• Enables to write the vehicle specification when replacing BCM.
System
Sub system selection item Diagnosis mode
WORK SUPPORT DATA MONITOR ACTIVE TEST
BCM BCM ×
Door lock DOOR LOCK ×××
Rear window defogger REAR DEFOGGER ×
Warning chime BUZZER ××
Interior room lamp timer INT LAMP ×××
Exterior lamp HEAD LAMP ×××
Wiper and washer WIPER ×××
Turn signal and hazard warning lamps FLASHER ××
Air conditioner AIR CONDITONER ×
Intelligent Key system INTELLIGENT KEY ×
Combination switch COMB SW ×
Immobilizer IMMU ××
Interior room lamp battery saver BATTERY SAVER ×××
Back door open TRUNK ××
RAP (retained accessory power) RETAINED PWR ×××
Signal buffer system SIGNAL BUFFER ××
TPMS (tire pressure monitoring sys-
tem) AIR PRESSURE MONITOR
×××
Vehicle security system PANIC ALARM ×
Revision: March 2010 2008 QX56