check engine INFINITI QX56 2011 Factory Service Manual

CHASSIS MAINTENANCEMA-25
< PERIODIC MAINTENANCE >
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2. Remove drain plug (1) and drain gear oil.
3. Set a gasket on drain plug (1) and install it to final drive assem-
bly and tighten to the specified torque. Refer to DLN-164,
"Exploded View".
CAUTION:
Never reuse gasket.
FRONT DIFFERENTIAL GEAR OIL: R180A : RefillingINFOID:0000000006220934
1. Remove filler plug (1). Fill with new gear oil until oil level reaches
the specified level near filler plug mounting hole.
2. After refilling oil, check oil level. Set a gasket to filler plug (1), then install it to final drive assembly. Refer to DLN-164,
"Exploded View".
CAUTION:
Never reuse gasket.
REAR DIFFERENTIAL GEAR OIL: R230
REAR DIFFERENTIAL GEAR OIL: R230 : InspectionINFOID:0000000006220935
OIL LEAKAGE
Check that differential gear oil is not leaking fr om the rear final drive assembly or around it.
OIL LEVEL
 Remove filler plug (1) and check oil level from filler plug mounting
hole as shown in the figure.
CAUTION:
Never start engine while checking oil level.
 Set a gasket on filler plug (1) and install it on final drive assembly. Refer to DLN-203, "
Exploded View".
CAUTION:
Never reuse gasket.
REAR DIFFERENTIAL GEAR OIL: R230 : DrainingINFOID:0000000006220936
1. Stop the engine.
JPDID0313ZZ
Oil grade and Viscosity : Refer to MA-10, "Fluids
and Lubricants".
Oil capacity : Refer to DLN-185, "
Gen-
eral Specifications".
JPDID0312ZZ
JPDID0415ZZ
Revision: 2010 May2011 QX56

MA-28
< PERIODIC MAINTENANCE >
CHASSIS MAINTENANCE
BRAKE FLUID LEVEL AND LEAKS : Inspection
INFOID:0000000006220939
 Check that the fluid level in the sub tank is within the specified range (MAX – MIN lines).
CAUTION:
Turn OFF the ignition switch an d depress the brake pedal 20 times or more to check brake fluid level.
NOTE:
Since brake fluid is in the accumulator in pressurized condition, the reservoir tank brake fluid level should be
lower than the MAX line.
 Visually check for any brake fluid leakage around the reservoir tank.
 Check the brake system for any leakage if the fl uid level is extremely low (lower than MIN).
 Check the brake system for fluid leakage if the warn ing lamp remains illuminated even after the parking
brake is released.
 Check the sub tank for the mixing of foreign ma tter (e.g. dust) and oils other than brake fluid.
BRAKE LINES AND CABLES
BRAKE LINES AND CABLES : InspectionINFOID:0000000006220940
1. Check brake line (tubes and hoses) for cracks, deterioration or other damage. Replace any damaged
parts.
2. Depress the brake pedal with a force of 490 N (50 kg, 110lb) and hold down the pedal for approx. 5 seconds with the engine run-
ning. Check for any fluid leakage.
CAUTION:
Retighten the applicable conn ection to the specified torque
and repair any abnormal (damag ed, worn or deformed) part
if any brake fluid leakage is present).
BRAKE FLUID
BRAKE FLUID : Bleeding Brake SystemINFOID:0000000006220941
CAUTION:
 Bleed air in the following order: motor/accumulator assembly → front right brake → front left brake
→ rear left brake → and rear right brake.
 The VDC warning lamp, ABS warning lamp and br ake warning lamp turn ON and DTC “C118E” may
be detected in self-diagnosis r esult for “ABS” with CONSULT-II I when the brake pedal is excessively
operated, such as air bleeding. Thi s is not a system malfunction becau se this occurs due to the tem-
porary decrease in accumulator fl uid pressure. The system returns to normal condition when the
accumulator fluid pressure reaches the specified pressu re with the ignition switch ON and the VDC
warning lamp, ABS warning lamp, and brake warnin g lamp turn OFF. After these steps, erase self-
diagnosis results for “ABS” with CONSULT-III.
- DTC other than “C118E” is detected: Refer to BRC-51, "
DTC Index".
NOTE:
When the ignition switch is ON, the brake warning la mp may turns ON even when the parking brake pedal is
released with the brake fluid within the specified level. This indicates the decrease in accumulator fluid pres-
sure.
MOTOR/ACCUMULATOR ASSEMBLY
CAUTION:
 If the brake fluid adheres to the brake caliper assembly and disc rotor, quickly wipe it off.
 Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it
off immediately and wash with wate r if it gets on a painted surface.
 Never operate the brake pedal with the reservoir cap removed. Failure to do this may cause the scat-
tering of brake fluid.
 Never operate the brake pedal excessively during the work procedure.
 Monitor the fluid level in the reservoir tank while performing the air bleeding.
SBR389C
Revision: 2010 May2011 QX56

MA-32
< PERIODIC MAINTENANCE >
CHASSIS MAINTENANCE
 Check gear housing and boots for looseness, damage and greaseleakage.
 Check connection with steering column for looseness.
STEERING LINKAGE
Check ball joint, dust cover and other component parts for looseness, wear, damage and grease leakage.
POWER STEERING FLUID AND LINES
POWER STEERING FLUID AND LINES : InspectionINFOID:0000000006220946
Check fluid level in reservoir tank with engine off.
Use “HOT” range at fluid temperatures of 50 to 80 °C (122 to 176 °F)
or “COLD” range at fluid temperatures of 0 to 30 °C (32 to 86 °F).
CAUTION:
 Do not overfill.
 Recommended fluid is Genuine NISSAN PSF or equivalent.
Refer to MA-10, "
Fluids and Lubricants".
 Check lines for improper attachment, leaks, cracks, damage, loose connections, chaf ing and deterioration.
 Check rack boots for accumulati on of power steering fluid.
AXLE AND SUSPENSION PARTS
AXLE AND SUSPENSION PARTS : InspectionINFOID:0000000006220947
Check front and rear axle and suspension parts for excessive play,
cracks, wear or other damage.
 Shake each wheel to check for excessive play.
 Check wheel bearings for smooth operation.
 Check axle and suspension nuts and bolts for looseness.
 Check strut (shock absorber) for oil leakage or other damage.
 Check suspension ball joint for grease leakage and ball joint dust
cover for cracks or other damage.
SLIA0014E
SGIA0232J
SST851C
SMA525A
Revision: 2010 May2011 QX56

SQUEAK AND RATTLE TROUBLE DIAGNOSESMIR-25
< SYMPTOM DIAGNOSIS >
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If the noise can be duplicated easily during the test drive, to help identify the source of the noise, try to dupli-
cate the noise with the vehicle stopped by doing one or all of the following:
1) Close a door.
2) Tap or push/pull around the area where the noise appears to be coming from.
3) Rev the engine.
4) Use a floor jack to recreate vehicle “twist”.
5) At idle, apply engine load (electrical load, half-cl utch on M/T models, drive position on A/T models).
6) Raise the vehicle on a hoist and hit a tire with a rubber hammer.
 Drive the vehicle and attempt to duplicate the conditions the customer states exist when the noise occurs.
 If it is difficult to duplicate the noise, drive the vehicle slowly on an undulating or rough road to stress the vehicle body.
CHECK RELATED SERVICE BULLETINS
After verifying the customer concern or symptom, che ck ASIST for Technical Service Bulletins (TSBs) related
to that concern or symptom.
If a TSB relates to the symptom, follow the procedure to repair the noise.
LOCATE THE NOISE AND IDENTIFY THE ROOT CAUSE
1. Narrow down the noise to a general area. To help pinpoint the source of the noise, use a listening tool
(Chassis Ear: J-39570, Engine Ear and mechanics stethoscope).
2. Narrow down the noise to a more specific area and identify the cause of the noise by:
 Removing the components in the area that you suspect the noise is coming from.
Do not use too much force when removing clips and fasteners, otherwise clips and fastener can be broken
or lost during the repair, resulting in the creation of new noise.
 Tapping or pushing/pulling the component that you suspect is causing the noise.
Do not tap or push/pull the component with excessive force, otherwise the noise will be eliminated only tem-
porarily.
 Feeling for a vibration with your hand by touching t he component(s) that you suspect is (are) causing the
noise.
 Placing a piece of paper between components that you suspect are causing the noise.
 Looking for loose components and contact marks. Refer to MIR-26, "
Inspection Procedure".
REPAIR THE CAUSE
 If the cause is a loose component, tighten the component securely.
 If the cause is insufficient clearance between components:
- Separate components by repositioning or loosening and retightening the component, if possible.
- Insulate components with a suitable insulator such as urethane pads, foam blocks, felt cloth tape or ure-
thane tape. A Nissan Squeak and Rattle Kit (J-43980) is available through your authorized Nissan Parts
Department.
CAUTION:
Do not use excessive force as many components are constructed of plastic and may be damaged.
NOTE:
Always check with the Parts Department for the latest parts information.
The following materials are contained in the Niss an Squeak and Rattle Kit (J-43980). Each item can be
ordered separately as needed.
URETHANE PADS [1.5 mm (0.059 in) thick]
Insulates connectors, harness, etc.
76268-9E005: 100 ×135 mm (3.94 ×5.31 in)/76884-71L01: 60 ×85 mm (2.36 ×3.35 in)/76884-
71L02:15 ×25 mm (0.59 ×0.98 in)
INSULATOR (Foam blocks)
Insulates components from contact. Can be used to fill space behind a panel.
73982-9E000: 45 mm (1.77 in) thick, 50 ×50 mm (1.97 ×1.97 in)/73982-
50Y00: 10 mm (0.39 in) thick, 50 ×50 mm (1.97 ×1.97 in)
INSULATOR (Light foam block)
80845-71L00: 30 mm (1.18 in) thick, 30 ×50 mm (1.18 ×1.97in)
FELT CLOTHTAPE
Used to insulate where movement does not occur. Ideal for instrument panel applications.
68370-4B000: 15 ×25 mm (0.59 ×0.98 in) pad/68239-13E00: 5 mm (0.20 in) wide tape roll
The following materials, not found in the kit, can also be used to repair squeaks and rattles.
UHMW (TEFLON) TAPE
Revision: 2010 May2011 QX56

MWI-2
DIAGNOSIS SYSTEM (COMBINATION
METER) ..............................................................
29
On Board Diagnosis Function .............................. ...29
CONSULT-III Function ...........................................30
ECU DIAGNOSIS INFORMATION ..............35
COMBINATION METER ................................. ...35
Reference Value .................................................. ...35
Fail-Safe .................................................................42
DTC Index ..............................................................43
IPDM E/R ...........................................................44
List of ECU Reference ......................................... ...44
WIRING DIAGRAM .....................................45
METER SYSTEM ............................................ ...45
Wiring Diagram .................................................... ...45
CLOCK ...............................................................55
Wiring Diagram .................................................... ...55
BASIC INSPECTION ...................................57
DIAGNOSIS AND REPAIR WORKFLOW
(METER SYSTEM ) .......................................... ...
57
Work flow ............................................................. ...57
DTC/CIRCUIT DIAGNOSIS ...................... ...59
U1000 CAN COMM CIRCUIT ......................... ...59
Description ........................................................... ...59
DTC Logic ...............................................................59
Diagnosis Procedure .............................................59
U1010 CONTROL UNIT (CAN) .........................60
Description ........................................................... ...60
DTC Logic ...............................................................60
Diagnosis Procedure ..............................................60
B2205 VEHICLE SPEED ...................................61
Description ........................................................... ...61
DTC Logic ...............................................................61
Diagnosis Procedure .............................................61
B2267 ENGINE SPEED .....................................62
Description ........................................................... ...62
DTC Logic ...............................................................62
Diagnosis Procedure ..............................................62
B2268 WATER TEMP ........................................63
Description ........................................................... ...63
DTC Logic ...............................................................63
Diagnosis Procedure ..............................................63
POWER SUPPLY AND GROUND CIRCUIT .....64
COMBINATION METER ........................................ ...64
COMBINATION METER : Diagnosis Procedure ....64
TRIP RESET AND ILLUMINATION CON-
TROL SWITCH SIGNAL CIRCUIT ....................
65
Diagnosis Procedure ............................................ ...65
Component Inspection ............................................66
TRIP COMPUTER SWITCH SIGNAL CIRCUIT
...
67
Diagnosis Procedure ............................................ ...67
Component Inspection ............................................68
FUEL LEVEL SENSOR SIGNAL CIRCUIT .......69
Component Function Check ................................ ...69
Diagnosis Procedure ..............................................69
Component Inspection ............................................70
OIL PRESSURE SWITCH SIGNAL CIRCUIT ...71
Component Function Check ...................................71
Diagnosis Procedure ...............................................71
Component Inspection ............................................71
WASHER LEVEL SWITCH SIGNAL CIRCUIT ...73
Diagnosis Procedure ............................................ ...73
Component Inspection ............................................73
A/C AUTO AMP. CONNECTION RECOGNI-
TION SIGNAL CIRCUIT ....................................
74
Diagnosis Procedure ........................................... ...74
SYMPTOM DIAGNOSIS ............................75
THE FUEL GAUGE INDICATOR DOES NOT
OPERATE ....................................................... ...
75
Description ........................................................... ...75
Diagnosis Procedure ...............................................75
THE TRIP RESET AND ILLUMINATION CON-
TROL SWITCH IS INOPERATIVE ....................
76
Description ........................................................... ...76
Diagnosis Procedure ...............................................76
THE TRIP COMPUTER SWITCH IS INOPER-
ATIVE .................................................................
77
Description ........................................................... ...77
Diagnosis Procedure ...............................................77
THE OIL PRESSURE WARNING LAMP
DOES NOT TURN ON .................................... ...
78
Description ........................................................... ...78
Diagnosis Procedure ...............................................78
THE OIL PRESSURE WARNING LAMP
DOES NOT TURN OFF .................................. ...
79
Description ........................................................... ...79
Diagnosis Procedure ...............................................79
THE PARKING BRAKE RELEASE WARNING
CONTINUES DISPLAYING, OR DOES NOT
DISPLAY ............................................................
80
Description ........................................................... ...80
Diagnosis Procedure ...............................................80
Revision: 2010 May2011 QX56

MWI-26
< SYSTEM DESCRIPTION >
SYSTEM
 The combination meter judges showing/hiding of “other warning”, according to the signals below:
Meter Illumination Level Indication
When receiving the following signals, the combination meter causes an interrupt on the information display to
indicate an illumination level.
WARNING CHECK INDICATION
 The combination meter can cause an interrupt on the information display to indicate a warning, based onsignals received from each unit and switch.
 The indicated warning can be checked with “WARNING” during the satisfaction of an interrupt indication
condition for each warning.
SETTING
Warning indication timing and time can be set.
Alert
Setting values for travel time, and low ambient te mperature can be adjusted to meet the user's needs.
Maintenance
Setting values for engine oil, oil filter, tire, and other maintenance items can be adjusted to meet the user's
needs.
Options
Setting values for unit and effect items can be adjusted to meet the user's needs.
Operating condition
Ignition switch ON
Mileage More than value set in “SETTING”
Signal name Signal path
Ignition signal —
Vehicle speed signal ABS actuator and electric unit (control unit) Combination meter
Signal name Signal path
Ignition signal —
Illumination control switch signal (+) Trip reset and illumination control switch Combination meter
Illumination control switch signal ( −)
Setting item Setting range Setting unit
Alert Timer No setting, 0.5 h - 6 h 0.5 h
ICY ON/OFF —
Setting item Setting range
Maintenance Tire
No setting, 500 km - 30,000 km
(No setting, 250 mile - 18,500 mile)
Filter No setting, 500 km - 30,000 km
(No setting, 250 mile - 18,500 mile)
Oil No setting, 500 km - 30,000 km
(No setting, 250 mile - 18,500 mile)
Other No setting, 500 km - 30,000 km
(No setting, 250 mile - 18,500 mile)
Revision: 2010 May2011 QX56

MWI
DIAGNOSIS SYSTEM (COMBINATION METER)
MWI-29
< SYSTEM DESCRIPTION >
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DIAGNOSIS SYSTEM (COMBINATION METER)
On Board Diagnosis FunctionINFOID:0000000006221719
ON BOARD DIAGNOSIS ITEM
The combination meter allows the following diagnosis items with the on-board diagnosis function.
METHOD OF STARTING
1. Turn ignition switch OFF.
2. While pressing the trip reset switch (1), turn ignition switch ON.
3. If the diagnosis function is activated with “trip A” displayed, the
mileage on “trip A” is reset to “0000.0”. (The same way for “trip
B”.)
4. Make sure that the trip meter displays “0000.0”.
5. Press the trip reset switch at least 3 times. (Wit hin 7 seconds after the ignition switch is turned ON.)
6. The combination meter is turned to self-diagnosis mode.  Speedometer, tachometer, engine coolant temper ature gauge, fuel gauge, engine oil pressure gauge,
and voltmeter return to zero, simultaneously.
 The dot matrix dots on the information display (1) blink alter-
nately.
NOTE:
 Check combination meter power supply and ground circuit when the self-diagnosis mode of the combi- nation meter does not start. Replace combination meter if power supply and ground circuit are normal.
 If any of the dots are not displayed, replace combination meter.
Diagnosis item
Drive circuit check  Speedometer
 Tachometer
 Engine coolant temperature gauge
 Fuel gauge
 Engine oil pressure gauge
 Voltmeter
LCD (liquid crystal display) check Information display
JSNIA2978ZZ
JSNIA0020GB
Revision: 2010 May2011 QX56

MWI-30
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (COMBINATION METER)
7. Each meter activates by pressing the trip reset switch.NOTE:
 If any of the meters or gauges is not activated, replace combination meter.
 The figure is reference.
CONSULT-III FunctionINFOID:0000000006221720
CONSULT-III APPLICATION ITEMS
CONSULT-III can perform the following diagnosis modes via CAN communication and the combination meter.
SELF DIAG RESULT
Refer to MWI-43, "DTC Index".
DATA MONITOR
Display Item List
X: Applicable
JSNIA3236ZZ
System Diagnosis mode Description
METER/M&A Self Diagnostic Result The combination meter checks the conditions and displays memorized errors.
Data Monitor Displays the combination meter input/output data in real time.
Special function Lighting history of the warning lamp and indicator lamp can be checked.
Display item [Unit]
MAIN
SIGNALS Description
SPEED METER
[km/h] XValue of vehicle speed
signal received from ABS actuator and el ectric unit (control
unit) via CAN communication.
NOTE:
655.35 is displayed when the malfunction signal is received.
SPEED OUTPUT
[km/h] XVehicle speed signal value transmitted to other units via CAN communication.
NOTE:
655.35 is displayed when the malfunction signal is received.
ODO OUTPUT
[km/h or mph] Odometer signal value transmitted to other units via CAN communication.
TACHO METER
[rpm] XValue of the engine speed signal received from ECM via CAN communication.
NOTE:
8191.875 is displayed when the malfunction signal is received.
FUEL METER
[L] X Fuel level indicated on combination meter.
Revision: 2010 May2011 QX56

MWI
DIAGNOSIS SYSTEM (COMBINATION METER)
MWI-31
< SYSTEM DESCRIPTION >
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W TEMP METER
[ ° C] XValue of engine coolant temperature signal is received from ECM via CAN com-
munication.
NOTE:
215 is displayed when the malfunction signal is input.
ABS W/L
[On/Off] Status of ABS warning lamp detected fr
om ABS warning lamp signal is received
from ABS actuator and electric unit (control unit) via CAN communication.
VDC/TCS IND
[On/Off] Status of VDC OFF indicator lamp detected from VDC OFF indicator lamp signal
is received from ABS actuator
and electric unit (control unit) via CAN communica-
tion.
SLIP IND
[On/Off] Status of VDC warning lamp detected from VDC warning lamp signal received
from ABS actuator and electric unit (control unit) via CAN communication.
BRAKE W/L
[On/Off] Status of brake warning lamp detected from brake warning lamp signal is received
from ABS actuator and electric unit (control unit) via CAN communication.
NOTE:
Displays “Off” if the brake warning lamp is illuminated when the valve check starts,
the parking brake switch is turned ON or the brake fluid level switch is turned ON.
DOOR W/L
[On/Off] Status of door open warning detected from door switch signal received from BCM
via CAN communication.
HI-BEAM IND
[On/Off] Status of high beam indicator lamp detected from high beam request signal is re-
ceived from BCM via CAN communication.
TURN IND
[On/Off] Status of turn indicator lamp detected from turn indicator signal is received from
BCM via CAN communication.
FR FOG IND
[Off] This item is displayed, but cannot be monitored.
RR FOG IND
[Off] This item is displayed, but cannot be monitored.
LIGHT IND
[On/Off] Status of light indicator lamp detected from position light request signal is received
from BCM via CAN communication.
OIL W/L
[On/Off] Status of oil pressure warning lamp detected from oil pressure switch signal is re-
ceived from BCM via CAN communication.
MIL
[On/Off] Status of malfunction indicator lamp detected from malfunctioning indicator lamp
signal is received from ECM via CAN communication.
GLOW IND
[Off] This item is displayed, but cannot be monitored.
CRUISE IND
[On/Off]  Status of CRUISE indicator detected from ASCD status signal is received from
ECM via CAN communicat ion. (ASCD models)
 Status of CRUISE indicator de tected from meter display signal is received from
ADAS control unit via CAN communication. (ICC models)
SET IND
[On/Off] Status of SET indicator detected from meter display signal is received from ADAS
control unit via CAN communication.
CRUISE W/L
[On/Off] Status of CRUISE warning lamp
judged from ICC warning lamp signal received
from ADAS control unit with CAN communication line.
BA W/L
[On/Off] Status of IBA OFF indicator lamp judged from IBA OFF indicator lamp signal re-
ceived from ADAS control unit with CAN communication line.
ATC/T-AMT W/L
[On/Off] Status of A/T CHECK warning lamp judged
from A/T CHECK indicator lamp signal
received from TCM with CAN communication line.
ATF TEMP W/L
[Off] This item is displayed, but cannot be monitored.
4WD W/L
[On/Off] Status of 4WD warning lamp judged from 4WD warning lamp signal received from
4WD control unit with
CAN communication line.
FUEL W/L
[On/Off] Low-fuel warning lamp status detected by the identified fuel level.
WASHER W/L
[On/Off] Status of low washer fluid warning judged from washer level switch input to com-
bination meter.
Display item [Unit]
MAIN
SIGNALS Description
Revision: 2010 May2011 QX56

MWI
DIAGNOSIS SYSTEM (COMBINATION METER)
MWI-33
< SYSTEM DESCRIPTION >
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*: DDS (hill descent control) NOTE:
Some items are not available according to vehicle specification.
SPECIAL FUNCTION
Special menu
W/L ON HISTORY
 Stores histories when warning/indicator lamp is turned on.
 “W/L ON HISTORY” indicates the “TIME” when the warning/ indicator lamp is turned on.
 The “TIME” above is:
- 0: The condition that the warning/indicator lamp has been turned on 1 or more times after starting the engine and waiting for 30 seconds.
- 1 - 39: The number of times the engine was restarted after the 0 condition.
- NO W/L ON HISTORY: Stores NO (0) turning on history of warning/indicator lamp.
NOTE:
 W/L ON HISTORY is not stored for approximately 30 seconds after the engine starts.
 Brake warning lamp does not store any history when the parking brake is applied or the brake fluid level gets
low.
Display Item
AT SFT DWN SW
[On/Off] Status of manual mode shift down switch.
PKB SW
[On/Off] Status of parking brake switch.
BUCKLE SW
[On/Off] Status of seat belt buckle switch (driver side).
BRAKE OIL SW
[On/Off] Status of brake fluid level switch.
A/C AMP CONN
[Off] This item is displayed, but cannot be monitored.
ENTER SW
[On/Off] Status of (ENTER) switch.
SELECT SW
[On/Off] Status of (SELECT) switch.
DISTANCE
[km] Value of distance to empty calculated by combination meter.
OUTSIDE TEMP
[ ° C or °F] Ambient temperature value converted from ambient sensor signal received from
ambient sensor.
NOTE:
This may not match with the temperature value indicated on the information dis-
play. (Because the information display value is a corrected value from the ambient
sensor input value.)
FUEL LOW SIG
[On/Off] Status of fuel level low warning signal to output to AV control unit via CAN com-
munication.
TOW MODE IND
[On/Off] Status of TOW mode indicator lamp judged from TOW mode indicator lamp signal
received from TCM with CAN communication line.
BUZZER
[On/Off] XBuzzer status (in the combination meter) is detected from the buzzer output signal
received from each unit via CAN communication and the warning output condition
of the combination meter.
Display item [Unit]
MAIN
SIGNALS Description
Display item Description
W/L ON HISTORY Lighting history of warning lamp and indicator lamp can be checked.
Revision: 2010 May2011 QX56