fuel INFINITI QX56 2006 Factory Service Manual

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QUICK REFERENCE INDEX
AGENERAL INFORMATIONGIGeneral Information
BENGINEEMEngine Mechanical
LUEngine Lubrication System
COEngine Cooling System
ECEngine Control System
FLFuel System
EXExhaust System
ACCAccelerator Control System
CTRANSMISSION/
TRANSAXLEATAutomatic Transmission
DDRIVELINE/AXLETFTransfer
PRPropeller Shaft
FFDFront Final Drive
RFDRear Final Drive
FAXFront Axle
RAXRear Axle
ESUSPENSIONFSUFront Suspension
RSURear Suspension
WTRoad Wheels & Tires
FBRAKESBRBrake System
PBParking Brake System
BRCBrake Control System
GSTEERINGPSPower Steering System
HRESTRAINTSSBSeat Belts
SRSSupplemental Restraint System (SRS)
IBODYBLBody, Lock & Security System
GWGlasses, Window System & Mirrors
RFRoof
EIExterior & Interior
IPInstrument Panel
SESeat
APAdjustable Pedal
JAIR CONDITIONERATCAutomatic Air Conditioner
KELECTRICALSCStarting & Charging System
LTLighting System
DIDriver Information System
WWWiper, Washer & Horn
BCSBody Control System
LANLAN System
AVAudio Visual, Navigation & Telephone System
ACSAuto Cruise Control System
PGPower Supply, Ground & Circuit Elements
LMAINTENANCEMAMaintenance
MINDEXIDXAlphabetical Index
Edition: July 2005
Revision: November 2009
Publication No. SM6E-1J60U2
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© 2009 NISSAN NORTH AMERICA, INC.
All rights reserved. No part of this Service Manual may be reproduced or stored in a retrieval system, or transmitted in any
form, or by any means, electronic, mechanical, photo-copying, recording or otherwise, without the prior written permission
of Nissan North America, Inc.
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2006
QUICK REFERENCE CHART: QX56

Drive Belt Deflection and Tension
Spark Plugs (Double Platinum Tipped)
Front Wheel Alignment (Unladen*1 )ELS001QR
*1: Fuel, radiator coolant and engine oil full. Spare tire, jack, hand tools and mats in designated positions.
*2: Target value 37° 31′ (37.52° )
*3: Target value 33 ° 59′ (33.98° )
*4: Target value 37 ° 44′ (37.73° )
*5: Target value 33 ° 29′ (33.48° )
Tension of drive belts Auto adjustment by auto tensioner
Make NGK
Standard type PLFR5A-11
Hot type PLFR4A-11
Cold type PLFR6A-11
Gap (nominal) 1.1 mm (0.043 in)
Drive type2WD 4WD
Camber
Degree minute (decimal degree) Minimum -0
° 51′ (-0.85 °)- 0° 33 ′ (-0.55 °)
Nominal -0° 6 ′ (-0.10 °)0 ° 12′ (0.20 °)
Maximum 0° 39′ (0.65 °)0 ° 57′ (0.95 °)
Cross camber 0° 45 ′ (0.75 °) or less 0 ° 45′ (0.75 °) or less
Caster
Degree minute (decimal degree) Minimum
3° 15′ (3.25 °)2 °45′ (2.75 °)
Nominal 4° 0 ′ (4.00 °)3 ° 30′ (3.50 °)
Maximum 4° 45′ (4.75 °)4 ° 15′ (4.25 °)
Cross caster 0° 45′ (0.75 °) or less 0 ° 45′ (0.75 °) or less
Kingpin inclination
Degree minute (decimal degree) 13
° 32′ (13.53° )1 3°13 ′ (13.22 °)
Total toe-in Distance (A
− B) Minimum
1.8 mm (0.07 in) 1.8 mm (0.07 in)
Nominal 2.8 mm (0.11 in) 2.8 mm (0.11 in)
Maximum 3.8 mm (0.15 in) 3.8 mm (0.15 in)
Angle (left side and right side)
Degree minute (decimal degree) Minimum
0° 3 ′ (0.05 °)0 ° 3′ (0.05 °)
Nominal 0° 5 ′ (0.08 °)0 ° 5′ (0.08 °)
Maximum 0° 7 ′ (0.12 °)0 ° 7′ (0.12 °)
Wheel turning angle
(full turn) Inside
Degree minute (decimal degree)
34° 31′
– 38° 31′ *2
(34.52 ° – 38.52 °) 34°
44′ – 38° 44 ′ *4
(34.73° – 38.73° )
Outside
Degree minute (decimal degree) 30° 59′
– 34° 59′ *3
(30.98 ° – 34.98 °) 30°
29′ – 34° 29 ′ *5
(30.48° – 34.48° )
SFA234AC

2006
QUICK REFERENCE CHART: QX56

Front Disc Brake - Repair LimitsELS001QU
Rear Disc Brake - Repair LimitsELS001QU
Brake PedalELS001QV
Unit: mm (in)
Refill CapacitiesELS001QW
Brake modelCLZ31VCAD41VA
Brake pad Standard thickness (new)
11.88 mm (0.468 in)12 mm (0.47 in)
Repair limit thickness 1.0 mm (0.039 in)1.0 mm (0.039 in)
Disc rotor Standard thickness (new)
26.0 mm (1.024 in) 30.0 mm (1.181 in)
Repair limit thickness 24.5 mm (0.965 in) 28.5 mm (1.122 in)
Maximum uneven wear (measured at 8 positions) 0.015 mm (0.0006 in)
Runout limit (with it attached to the vehicle) 0.03 mm (0.001 in)
Brake model AD14VE
Brake pad Standard thickness (new)
12.13 mm (0.478 in)
Repair limit thickness 1.0 mm (0.039 in)
Disc rotor Standard thickness (new)
14.0 mm (0.551 in)
Repair limit thickness 12.0 mm (0.472 in)
Maximum uneven wear (measured at 8 positions) 0.015 mm (0.0006 in)
Runout limit (with it attached to the vehicle) 0.05 mm (0.002 in)
Brake pedal height (from dash panel top surface) 182.3 − 192.3 (7.18 − 7.57)
Depressed pedal height [under a force of 490 N (50 kg, 110 lb) with engine running] More than 90.3 (3.55)
Clearance between stopper rubber and the threaded end of stop lamp switch 0.74 − 1.96 (0.029 − 0.077)
Pedal play 3 − 11 (0.12 − 0.43)
Description Capacity (Approximate)
Metric US measure Imp measure
Fuel 105.8 28 gal 23 1/4 gal
Engine oil
(drain and refill) With oil filter change
6.2 6 1/2 qt 5 1/2 qt
Without oil filter change 5.9 6 1/4 qt 5 1/4 qt
Dry engine (engine overhaul) 7.6 8 qt
6 3/4 qt
Cooling system With reservoir at MAX level
14.4 3 3/4 gal 3 1/8 gal
Automatic transmission fluid (ATF) 10.6 11 1/4 qt 9 3/8 qt
Rear final drive oil 1.75 3 3/4 pt 3 1/8 pt
Transfer fluid 3.0 3 1/8 qt 2 5/8 qt
Front final drive oil 1.6 3 3/8 pt 2 7/8 pt
Power steering fluid (PSF) 1.0 2 1/8 pt 1 3/4 pt
Windshield washer fluid 4.5 1 1/4 gal 1 gal
Air conditioning system refrigerant 1.08 ± 0.05 kg 2.38 ± 0.11 lb 2.38 ± 0.11 lb
Air conditioning system lubricants 290 m9.8 fl oz 10.2 fl oz

ACS-12
[ICC]
LASER BEAM AIMING ADJUSTMENT
Revision: November 20092006 QX56
LASER BEAM AIMING ADJUSTMENTPFP:00026
Outline of Laser Beam Aiming Adjustment ProcedureEKS00BLN
CAUTION:

The laser beam aiming adjustment cannot be performed without CONSULT-II.

The laser beam aiming adjustment must be performed every time the ICC sensor is removed,
installed or has been moved as a result of a collision.
1. Prepare the vehicle and the work area.
2. Set up the ICC target board. For details, refer to Technical Service Bulletin.
3. Adjust the sensor following the procedure on CONSULT-II.
4. Check system operation after the adjustment.
PreparationEKS00BLO

Place the vehicle on level ground. Shift the transmission into "P" position and release the parking brake.

Adjust the tire pressure to the specified value.

See that there is no load in the vehicle. Coolant, engine oil and fuel should be filled to correct level.

Check that the vehicle suspension has been adjusted to the standard height by the load leveling rear air
suspension system. Refer to RSU-12, "
Basic Inspection" .

Clean the sensor with a soft cloth.
Setting up the ICC Target BoardEKS00BLP
CAUTION:
Accuracy in setting up the ICC target board is essential for the laser beam aiming adjustment.
For details, refer to Technical Service Bulletin.
ADJUSTING HEIGHT OF THE TARGET
1. Attach a triangle scale as shown.Tool number : KV99110100 (J-45718)
LKIA0632E
WKIA1849E

PRECAUTIONSAT-7
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PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
ECS00CDJ
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER ”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for On Board Diagnostic (OBD) System of A/T and EngineECS00CDK
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:

Be sure to turn the ignition switch “OFF” and disconnect the negative battery cable before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves,
etc. Will cause the MIL to light up.

Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MIL to light up due to an open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)

Be sure to route and secure the harnesses properly after work. Interference of the harness with a
bracket, etc. May cause the MIL to light up due to a short circuit.

Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MIL to light up due to a malfunction of the EGR system or fuel injection system, etc.

Be sure to erase the unnecessary malfunction information (repairs completed) from the TCM and
ECM before returning the vehicle to the customer.

A/T CONTROL SYSTEMAT-35
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Revision: November 2009 2006 QX56
Lock-up Applied

In the lock-up applied state, the torque converter clutch control valve is set into the locked state by the
torque converter clutch solenoid and lock-up apply pressure is generated.
In this way, the torque converter clutch piston is pressed and coupled.
SMOOTH LOCK-UP CONTROL
When shifting from the lock-up released state to the lock-up applied state, the current output to the torque con-
verter clutch solenoid is controlled with the TCM. In this way, when shifting to the lock-up applied state, the
torque converter clutch is temporarily set to the half-clutched state to reduce the shock.
Half-clutched State

The current output from the TCM to the torque converter clutch solenoid is varied to gradually increase
the torque converter clutch solenoid pressure.
In this way, the lock-up apply pressure gradually rises and while the torque converter clutch piston is put
into half-clutched status, the torque converter clutch piston operating pressure is increased and the cou-
pling is completed smoothly.
Slip Lock-up Control

In the slip region, the torque converter clutch solenoid current is controlled with the TCM to put it into the
half-clutched state. This absorbs the engine torque fluctuation and lock-up operates from low speed.
This raises the fuel efficiency for 4th and 5th gears at both low speed and when the accelerator has a low
degree of opening.

ON BOARD DIAGNOSTIC (OBD) SYSTEMAT-39
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Revision: November 2009 2006 QX56
If the DTC is being detected currently, the time data will be “0”.
If a 1st trip DTC is stored in the ECM, the time data will be “1t ”.
Freeze Frame Data and 1st Trip Freeze Frame Data
The ECM has a memory function, which stores the driving condition such as fuel system status, calculated
load value, engine coolant temperature, short term fuel trim, long term fuel trim, engine speed and vehicle
speed at the moment the ECM detects a malfunction.
Data which are stored in the ECM memory, along with the 1st trip DTC, are called 1st trip freeze frame data,
and the data, stored together with the DTC data, are called freeze frame data and displayed on CONSULT-II
or GST. The 1st trip freeze frame data can only be displayed on the CONSULT-II screen, not on the GST. For
detail, refer to AT- 3 8 , "
ON BOARD DIAGNOSTIC (OBD) SYSTEM" .
Only one set of freeze frame data (either 1st trip freeze frame data of freeze frame data) can be stored in the
ECM. 1st trip freeze frame data is stored in the ECM memory along with the 1st trip DTC. There is no priority
for 1st trip freeze frame data and it is updated each time a different 1st trip DTC is detected. However, once
freeze frame data (2nd trip detection/MIL on) is stored in the ECM memory, 1st trip freeze frame data is no
longer stored. Remember, only one set of freeze frame data can be stored in the ECM. The ECM has the fol-
lowing priorities to update the data.
Both 1st trip freeze frame data and freeze frame data (along with the DTC) are cleared when the ECM mem-
ory is erased.
HOW TO ERASE DTC
The diagnostic trouble code can be erased by CONSULT-II, GST or ECM DIAGNOSTIC TEST MODE as
described following.

If the battery cable is disconnected, the diagnostic trouble code will be lost within 24 hours.

When you erase the DTC, using CONSULT-II or GST is easier and quicker than switching the mode
selector on the ECM.
The following emission-related diagnostic information is cleared from the ECM memory when erasing DTC
related to OBD-II. For details, refer to EC-49, "
EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS" .

Diagnostic trouble codes (DTC)

1st trip diagnostic trouble codes (1st trip DTC)

Freeze frame data
SAT015K
SAT016K
Priority Items
1 Freeze frame data Misfire — DTC: P0300 - P0306
Fuel Injection System Function — DTC: P0171, P0172, P0174, P0175
2 Except the above items (Includes A/T related items)
3 1st trip freeze frame data

AV-2Revision: November 20092006 QX56
TEM ..................................................................
... 65
Wiring Diagram — H/PHONE — ......................... ... 67
Terminals and Reference Value for Bluetooth Con-
trol Unit ................................................................... 69
Bluetooth Control Unit Self-Diagnosis Function .. ... 71
BLUETOOTH CONTROL UNIT INITIALIZATION
CHECKS ........................................................... ... 71
STARTING THE DIAGNOSTIC MODE ............ ... 71
Power Supply and Ground Circuit Check for Blue-
tooth Control Unit ................................................. ... 72
Removal and Installation ..................................... ... 73
BLUETOOTH CONTROL UNIT ........................ ... 73
BLUETOOTH ON INDICATOR ......................... ... 73
MICROPHONE ................................................. ... 73
DVD ENTERTAINMENT SYSTEM ......................... ... 75
Component Parts and Harness Connector Location ... 75
Description ........................................................... ... 76
Schematic ............................................................ ... 77
Wiring Diagram — DVD — .................................. ... 78
Trouble Diagnosis ................................................ ... 81
Power Supply Circuit Inspection .......................... ... 82
Removal and Installation ..................................... ... 83
DVD PLAYER ...................................................... 83
VIDEO MONITOR ............................................ ... 83
NAVIGATION SYSTEM .......................................... ... 84
System Description .............................................. ... 84
TRAVEL DISTANCE ......................................... ... 84
TRAVEL DIRECTION ....................................... ... 84
MAP-MATCHING .............................................. ... 85
GPS (GLOBAL POSITIONING SYSTEM) ....... ... 85
COMPONENT DESCRIPTION ......................... ... 86
CAN Communication System Description ........... ... 86
Component Parts Location .................................. ... 87
Schematic ............................................................ ... 88
Wiring Diagram — NAVI — .................................. ... 89
Schematic ............................................................ ... 96
Wiring Diagram — COMM — .............................. ... 97
Terminals and Reference Value for NAVI Control
Unit ...................................................................... .100
Terminals and Reference Value for Display Control
unit ....................................................................... .102
Terminals and Reference Value for Display unit .. .106
Terminals and Reference Value for AV Switch .... .108
Terminals and Reference Value for BCM ............. .109
On Board Self-Diagnosis Function ...................... ..111
DESCRIPTION ................................................. ..111
DIAGNOSIS ITEM ............................................ ..111
Self-Diagnosis Mode (DCU) ................................ .112
OPERATION PROCEDURE ............................. .112
SELF–DIAGNOSIS RESULT ............................ .113
Self-Diagnosis Mode (NAVI) ................................ .114
OPERATION PROCEDURE ............................. .114
SELF–DIAGNOSIS RESULT ............................ .115
Confirmation/Adjustment Mode ........................... .117
OPERATION PROCEDURE ............................. .117
DISPLAY DIAGNOSIS ...................................... .118
VEHICLE SIGNALS .......................................... .118
NAVIGATION .................................................... .119
DISPLAY DIAGNOSIS ...................................... .119VEHICLE SIGNALS ..........................................
.120
ERROR HISTORY ............................................ .120
DIAGNOSIS BY ERROR HISTORY ................. .120
NAVIGATION .................................................... .122
CAN DIAG SUPPORT MONITOR ....................... .124
OPERATION PROCEDURE ............................. .124
AV Switch Self-Diagnosis Function ...................... .125
Power Supply and Ground Circuit Check for NAVI
Control Unit .......................................................... .126
Power Supply and Ground Circuit Check for Display
Control Unit .......................................................... .127
Power Supply and Ground Circuit Check for Display
Unit ....................................................................... .128
Power Supply and Ground Circuit Check for AV
Switch .................................................................. .130
Vehicle Speed Signal Check for NAVI Control Unit .131
Vehicle Speed Signal Check for Display Control Unit .132
Illumination Signal Check for NAVI Control Unit .. .133
Illumination Signal Check for Display Control Unit .133
Ignition Signal Check for NAVI Control Unit ......... .133
Ignition Signal Check for Display Control Unit ..... .134
Reverse Signal Check for NAVI Control Unit ....... .134
Reverse Signal Check for Display Control Unit ... .134
AV Communication Line Check (Between Display
Control Unit and NAVI Control Unit) ..................... .135
Audio Communication Line Check (Between Dis-
play Control Unit and Audio Unit) ......................... .136
Display Communication Line Check (Between Dis-
play Control Unit and Display Unit) ...................... .138
AV Communication Line Check (Between Display
Control Unit and AV Switch) ................................. .139
CAN Communication Line Check ........................ .140
If NAVI Control Unit Detects That DVD-ROM Map
is Not Inserted ...................................................... .140
If NAVI Control Unit Detects That Inserted DVD-
ROM Map is Malfunctioning or If It is Impossible to
Load Data from DVD-ROM Map .......................... .141
If Connection Between NAVI Control Unit and GPS
Antenna is Malfunctioning .................................... .141
Operating Screen for Audio and A/C is Not Dis-
played When Showing NAVI Screen .................... .142
Color of RGB Image is Not Proper (Only NAVI
Screen Looks Bluish) ........................................... .143
Color of RGB Image is Not Proper (Only NAVI
Screen Looks Reddish) ........................................ .144
Color of RGB Image is Not Proper (Only NAVI
Screen Looks Yellowish) ...................................... .145
Color of RGB Image is Not Proper (All Screens Look
Bluish) .................................................................. .146
Color of RGB Image is Not Proper (All Screens Look
Reddish) ............................................................... .147
Color of RGB Image is Not Proper (All Screens Look
Yellowish) ............................................................. .148
NAVI Screen is Rolling ......................................... .150
Guide Sound is Not Heard ................................... .152
Screen is Not Shown ........................................... .153
A/C Screen is Not Shown (NAVI Screen is Shown) .153
FUEL ECONOMY Screen is Not Shown .............. .153
Average Fuel Economy Displayed is Not Shown (“

AV-34
AUDIO
Revision: November 20092006 QX56
Occurrence conditionPossible cause
Occurs only when engine is ON. A continuous growling noise occurs. The speed of
the noise varies with changes in the engine speed.

Ignition components
A whistling noise occurs while the engine speed is
high. A booming noise occurs while the engine is
running and the lighting switch is ON.

Generator
The occurrence of the noise is linked with the operation of the fuel pump.

Fuel pump condenser
Noise only occurs when various
electrical components are oper-
ating. A cracking or snapping sound occurs with the
operation of various switches.

Relay malfunction, audio unit malfunction
The noise occurs when various motors are operat-
ing.

Motor case ground

Motor
The noise occurs constantly, not just under certain conditions.

Rear defogger coil malfunction

Open circuit in printed heater

Poor ground of antenna amplifier or
antenna feeder line
A cracking or snapping sound occurs while the vehicle is being driven, especially
when it is vibrating excessively.

Ground wire of body parts

Ground due to improper part installation

Wiring connections or a short circuit

NAVIGATION SYSTEMAV-153
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Revision: November 2009 2006 QX56
Screen is Not ShownEKS00GEX
1. POWER SUPPLY AND GROUND CIRCUIT CHECK
Check power supply and ground circuit for display unit. Refer to AV- 1 2 8 , "
Power Supply and Ground Circuit
Check for Display Unit" .
OK or NG
OK >> Replace display unit. Refer to AV- 1 6 7 , "DISPLAY UNIT" .
NG >> Check the malfunctioning parts.
A/C Screen is Not Shown (NAVI Screen is Shown)EKS00GEY
1. CHECK IGNITION SIGNAL
Check ignition signal. Refer to AV- 1 3 4 , "
Ignition Signal Check for Display Control Unit" .
OK or NG
OK >> GO TO 2.
NG >> Check the malfunctioning parts.
2. CHECK CAN COMMUNICATION LINE
Check CAN communication line. Refer to AV- 1 4 0 , "
CAN Communication Line Check" .
OK or NG
OK >> Replace display control unit. Refer to AV- 1 6 7 , "DISPLAY CONTROL UNIT" .
NG >> After filling out CAN DIAG SUPPORT MONITOR check sheet, GO TO LAN-26, "
CAN COMMUNI-
CATION" .
FUEL ECONOMY Screen is Not ShownEKS00GEZ
1. CHECK IGNITION SIGNAL
Check ignition signal. Refer to AV- 1 3 3 , "
Illumination Signal Check for Display Control Unit" .
OK or NG
OK >> GO TO 2.
NG >> Check the malfunctioning parts.
2. CHECK CAN COMMUNICATION LINE
Check CAN communication line. Refer to AV- 1 4 0 , "
CAN Communication Line Check" .
OK or NG
OK >> Replace display control unit. Refer to AV- 1 6 7 , "DISPLAY CONTROL UNIT" .
NG >> After filling out CAN DIAG SUPPORT MONITOR check sheet, GO TO LAN-26, "
CAN COMMUNI-
CATION" .
Average Fuel Economy Displayed is Not Shown (“ *** ” is Shown)EKS00GF0
1. CHECK VEHICLE SPEED SIGNAL
Check vehicle speed signal. Refer to AV- 1 3 2 , "
Vehicle Speed Signal Check for Display Control Unit" .
OK or NG
OK >> GO TO 2.
NG >> Check the malfunctioning parts.
2. CHECK CAN COMMUNICATION LINE
Check CAN communication line. Refer to AV- 1 4 0 , "
CAN Communication Line Check" .
OK or NG
OK >> Replace display control unit. Refer to AV- 1 6 7 , "DISPLAY CONTROL UNIT" .
NG >> After filling out CAN DIAG SUPPORT MONITOR check sheet, GO TO LAN-26, "
CAN COMMUNI-
CATION" .