2009 INFINITI QX56 oil

MWI-62
< ECU DIAGNOSIS >
COMBINATION METER
DTC Index
INFOID:0000000003776656
Function Specifications
Speedometer
Zero indication.
Tachometer
Fuel gauge
Engine coolant temperature gauge
Engine oil pressure gauge
Voltage gauge
A/T oil temperature gauge
Illumination control
Meter illumination Change to nighttime mode when communication is lost.
Segment LCD Odometer
Freeze current indication.
A/T position Display turns off.
Buzzer Buzzer turns off.
Warning lamp/indicator lamp ABS warning lamp
Lamp turns on when communication is lost.
Brake warning lamp
VDC OFF indicator lamp
SLIP indicator lamp
A/T CHECK warning lamp
Lamp turns off when communication is lost.
Oil pressure/coolant temperature
warning lamp
Light indicator
Malfunction indicator lamp
Master warning lamp
Air bag warning lamp
High beam indicator
Turn signal indicator lamp
CRUISE indicator lamp
Driver and passenger seat belt warn-
ing lamp
Lamp turns off when disconnected.
Charge warning lamp
Security indicator lamp
4WD indicator lamp
AT P i n d i c a t o r l a m p
CK SUSP warning lamp
Low tire pressure warning lamp
Lamp will flash every second for 1 minute and then stay on con-
tinuously thereafter.
CONSULT-III display
MalfunctionReference
page
CAN COMM CIRC
[U1000] Malfunction is detected in CAN communication.
CAUTION:
Even when there is no malfunction on CAN communication system, malfunction may be
misinterpreted when battery has low voltage (when maintaining 7 - 8 V for about 2 sec-
onds) or 10A fuse [No. 3, located in
the fuse block (J/B)] is disconnected. MWI-28
VEHICLE SPEED
CIRC
[B2205]Malfunction is detected when an erroneous speed signal is input.
CAUTION:
Even when there is no malfunction on speed signal system, malfunction may be misin-
terpreted when battery has lo
w voltage (when maintaining 7 - 8 V for about 2 seconds). MWI-29
Revision: December 20092009 QX56

MWI
BCM (BODY CONTROL MODULE)MWI-65
< ECU DIAGNOSIS >
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HEADLAMP SW1 Headlamp switch OFF OFF
Headlamp switch 1st
ON
HEADLAMP SW2 Headlamp switch OFF
OFF
Headlamp switch 1st ON
HI BEAM SW High beam switch OFF
OFF
High beam switch HI ON
H/L WASH SW NOTE:
The item is indicated, but not monitored OFF
IGN ON SW Ignition switch OFF or ACC
OFF
Ignition switch ON ON
IGN SW CAN Ignition switch OFF or ACC
OFF
Ignition switch ON ON
INT VOLUME Wiper intermittent dial is in a dial position 1 - 7 1 - 7
I-KEY LOCK LOCK button of Intelligent Key is not pressed
OFF
LOCK button of Intelligent Key is pressed ON
I-KEY UNLOCK UNLOCK button of Intelligent Key is not pressed
OFF
UNLOCK button of Intelligent Key is pressed ON
KEY ON SW Mechanical key is removed from key cylinder
OFF
Mechanical key is inserted to key cylinder ON
OIL PRESS SW • Ignition switch OFF or ACC
• Engine running
OFF
Ignition switch ON ON
PASSING SW Other than lighting switch PASS
OFF
Lighting switch PASS ON
REAR DEF SW Rear window defogger switch OFF
OFF
Rear window defogger switch ON ON
RKE LOCK AND UN-
LOCK NOTE:
The item is indicated, but not monitored OFF
ON
RR WASHER SW Rear washer switch OFF
OFF
Rear washer switch ON ON
RR WIPER INT Rear wiper switch OFF
OFF
Rear wiper switch INT ON
RR WIPER ON Rear wiper switch OFF
OFF
Rear wiper switch ON ON
RR WIPER STOP Rear wiper stop position
OFF
Other than rear wiper stop position ON
TAIL LAMP SW Lighting switch OFF
OFF
Lighting switch 1ST ON
TRNK OPNR SW When back door opener switch is not pressed
OFF
When back door opener switch is pressed ON
TURN SIGNAL L Turn signal switch OFF
OFF
Turn signal switch LH ON
TURN SIGNAL R Turn signal switch OFF
OFF
Turn signal switch RH ON
VEHICLE SPEED While driving Equivalent to speedo meter reading
Monitor Item
Condition Value/Status
Revision: December 20092009 QX56

MWI
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
MWI-79
< ECU DIAGNOSIS >
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IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE
ROOM)
Reference ValueINFOID:0000000004225402
VALUES ON THE DIAGNOSIS TOOL
Monitor Item ConditionValue/Status
MOTOR FAN REQ Engine idle speed Changes depending on engine
coolant temperature, air conditioner
operation status, vehicle speed,
etc.0 - 100 %
A/C COMP REQ A/C switch OFF
OFF
A/C switch ON ON
TA I L & C L R R E Q Lighting switch OFF
OFF
Lighting switch 1ST, 2ND, HI or AUTO (Light is illuminated) ON
HL LO REQ Lighting switch OFF
OFF
Lighting switch 2ND HI or AUTO (Light is illuminated) ON
HL HI REQ Lighting switch OFF
OFF
Lighting switch HI ON
FR FOG REQ Lighting switch 2ND or AUTO (Light
is illuminated) Front fog lamp switch OFF OFF
• Front fog lamp switch ON
• Daytime light activated (Canada
only) ON
HL WASHER REQ NOTE:
This item is displayed, but cannot be monitored.
OFF
FR WIP REQ Ignition switch ON Front wiper switch OFF
STOP
Front wiper switch INT 1LOW
Front wiper switch LO LOW
Front wiper switch HI HI
WIP AUTO STOP Ignition switch ON Front wiper stop position
STOP P
Any position other than front wiper
stop position ACT P
WIP PROT Ignition switch ON Front wiper operates normally OFF
Front wiper stops at fail-safe opera-
tion
BLOCK
ST RLY REQ Ignition switch OFF or ACC
OFF
Ignition switch START ON
IGN RLY Ignition switch OFF or ACC
OFF
Ignition switch ON ON
RR DEF REQ Rear defogger switch OFF
OFF
Rear defogger switch ON ON
OIL P SW Ignition switch OFF, ACC or engine running
OPEN
Ignition switch ON CLOSE
DTRL REQ Daytime light system requested OFF with CONSULT-III.
OFF
Daytime light system reques ted ON with CONSULT-III. ON
HOOD SW Hood closed.
OFF
Hood open. ON
Revision: December 20092009 QX56

MWI
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
MWI-83
< ECU DIAGNOSIS >
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O P26 P/L Headlamp aiming mo-
tors
Output —Lighting
switch 2nd
position or
AUTO, head-
lamp aiming
switch in po-
sition OFF
0V
ON Battery voltage
27 W/B Fuse 38
(With trailer tow)
Output —Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
30 W Fuse 53 Output —Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
32 L Wiper low speed sig-
nal
OutputON or
START Wiper switch OFF
Battery voltage
LO or INT 0V
35 L/B Wiper high speed sig-
nal
OutputON or
START Wiper switch OFF, LO, INT Battery voltage
HI 0V
37 Y Power generation
command signal Output —Ignition switch ON
6.3 V
40% is set on "Active test,"
"ALTERNATOR DUTY" of
"ENGINE" 3.8 V
40% is set on "Active test,"
"ALTERNATOR DUTY" of
"ENGINE" 1.4 V
38 B Ground Input ——0V
39 L CAN-H — ON— —
40 P CAN-L — ON— —
41 Y/B Hood switch Input —Hood closed OFF
0V
Hood open ON Battery voltage
42 GR Oil pressure switch Input — Engine running
Battery voltage
Engine stopped 0V
Te r m i n a l
Wire
color Signal name Signal
input/
output Measuring condition
Reference value(Approx.)
Igni-
tion
switch Operation or condition
JPMIA0001GB
JPMIA0002GB
JPMIA0003GB
Revision: December 20092009 QX56

MWI-90
< ECU DIAGNOSIS >
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
If No CAN Communication Is Available With BCM
IGNITION RELAY MALFUNCTION DETECTION FUNCTION
• IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it.
• IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation
coil circuit.
• If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to alert the user to the ignition relay malfunction when the ignition switch is turned OFF.
NOTE:
The tail lamp turns OFF when the ignition switch is turned ON.
FRONT WIPER CONTROL
IPDM E/R detects front wiper stop posit ion by a front wiper auto stop signal.
When a front wiper auto stop signal is in the conditions listed below, IPDM E/R stops power supply to wiper
after repeating a front wiper 10 second activation and 20 second stop five times.
NOTE:
This operation status can be confirmed on the IPDM E/R “DATA MONITOR” that displays “Block” for the item
“WIP PROT” while the wiper is stopped.
STARTER MOTOR PROTECTION FUNCTION
IPDM E/R turns OFF the starter control relay to protect the starter motor when the starter control relay remains
active for 90 seconds.
Control part Fail-safe in operation
Cooling fan • Turns ON the cooling fan relay when the ignition switch is turned ON
• Turns OFF the cooling fan relay when the ignition switch is turned OFF
Control part
Fail-safe in operation
Headlamp • Turns ON the headlamp low relay when the ignition switch is turned ON
• Turns OFF the headlamp low relay when the ignition switch is turned OFF
• Headlamp high relay OFF
•Parking lamps
• License plate lamps
• Tail lamps • Turns ON the tail lamp relay when the ignition switch is turned ON
• Turns OFF the tail lamp relay when the ignition switch is turned OFF
Front wiper • The status just before activation of fail-safe control is maintained until the ignition
switch is turned OFF while the front wiper is operating at LO or HI speed.
• The wiper is operated at LO speed until the ignition switch is turned OFF if the fail- safe control is activated while the front wipe r is set in the INT mode and the front wiper
motor is operating.
Rear window defogger Rear window defogger relay OFF
A/C compressor A/C relay OFF
Front fog lamps Front fog lamp relay OFF
Ignition switch Ignition relayTail lamp relay
ON ON —
OFF OFF —
Ignition switchFront wiper switch Auto stop signal
ON OFF
Front wiper stop position signal cannot be
input 10 seconds.
ON The signal does not change for 10 seconds.
Revision: December 20092009 QX56

MWI-94
< SYMPTOM DIAGNOSIS >
THE OIL PRESSURE WARNING LAMP DOES NOT TURN ON
THE OIL PRESSURE WARNING LAMP DOES NOT TURN ON
DescriptionINFOID:0000000003776673
The oil pressure warning lamp stays off when the ignition switch is turned ON.
Diagnosis ProcedureINFOID:0000000003776674
1.CHECK OIL PRESSURE WARNING LAMP
Perform IPDM E/R auto active test. Refer to PCS-12, "
Diagnosis Description".
Is oil pressure warning lamp illuminated?
YES >> GO TO 2
NO >> Replace combination meter. Refer to MWI-102, "
Removal and Installation".
2.CHECK OIL PRESSURE SWITCH SIGNAL CIRCUIT
Check the oil pressure switch signal circuit. Refer to MWI-35, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair harness or connector.
3.CHECK OIL PRESSURE SWITCH UNIT
Perform a unit check for the oil pressure switch. Refer to MWI-35, "
Component Inspection".
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to PCS-34, "Removal and Installation of IPDM E/R".
NO >> Replace oil pressure switch.
Revision: December 20092009 QX56

MWI
THE OIL PRESSURE WARNING LAMP DOES NOT TURN OFFMWI-95
< SYMPTOM DIAGNOSIS >
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THE OIL PRESSURE WARNING LAMP DOES NOT TURN OFF
DescriptionINFOID:0000000003776675
The oil pressure warning lamp remains illuminated while the engine is running (normal oil pressure).
Diagnosis ProcedureINFOID:0000000003776676
1.CHECK OIL PRESSURE WARNING LAMP
Perform IPDM E/R auto active test. Refer to PCS-12, "
Diagnosis Description".
Is oil pressure warning lamp illuminated?
YES >> GO TO 2
NO >> Replace combination meter. Refer to MWI-102, "
Removal and Installation".
2.CHECK IPDM E/R OUTPUT VOLTAGE
1. Turn ignition switch OFF.
2. Disconnect the oil pressure switch connector.
3. Turn ignition switch ON.
4. Check voltage between the oil pressure switch harness connec- tor F4 terminal 1 and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> GO TO 4
3.CHECK OIL PRESSURE SWITCH
Perform a unit check for the oil pressure switch. Refer to MWI-35, "
Component Inspection".
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to PCS-34, "Removal and Installation of IPDM E/R".
NO >> Replace oil pressure switch.
4.CHECK OIL PRESSURE SWITCH SIGNAL CIRCUIT
Check the oil pressure switch signal circuit. Refer to MWI-35, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to PCS-34, "Removal and Installation of IPDM E/R".
NO >> Repair harness or connector. 1 – Ground
: Approx. 12V
PKIC1144E
Revision: December 20092009 QX56

PCS
SIGNAL BUFFER SYSTEMPCS-9
< FUNCTION DIAGNOSIS > [IPDM E/R]
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SIGNAL BUFFER SYSTEM
System DiagramINFOID:0000000003776491
System DescriptionINFOID:0000000003776492
IPDM E/R reads the status of the oi
l pressure switch and transmits the oil pressure switch signal to BCM via
CAN communication. Refer to LAN-4, "
System Description".
AWNIA0174GB
Revision: December 20092009 QX56