ignition INFINITI QX56 2007 Factory Service Manual

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< SERVICE INFORMATION >
CHARGING SYSTEM
Before starting, perform the preliminary inspection. Refer to "PRELIMINARY INSPECTION".
1. Stop the operation of the power generation variable voltage control system using either of the following
procedures.
• Using the CONSULT-II, select "ENGINE" from "SELECT SYSTEM" and set the "ALT DUTY" to 0%.
Keep "ALT DUTY" at 0% until the end of the inspection. When the "ALT DUTY" value is 0% or 100%,
normal power generation is performed according to the characteristic of the IC regulator in the genera-
tor.
• Turn the ignition switch off, and disconnect the battery current sensor connector. Disconnecting the bat-
tery current sensor may cause DTC (P1550 - P1554) to set. After finishing the inspection, connect the
battery current sensor connector and erase the self-diagnostic results history of the engine using CON-
SULT-II.
2. Turn off all loads on the vehicle electrical system.
3. Perform battery and starting system test with Battery/Starting/
Charging system tester.
4. Press “ENTER” to begin the charging system test.
5. Start engine.
6. Press “ENTER” until “LOADS OFF REV ENGINE 5 SEC” is dis-
played.
7. Raise and hold the engine speed at 1,500 to 2,000 rpm for about
5 seconds, then return the engine to idle.
Once the increase in engine rpm is detected, press “ENTER” to
continue.
NOTE:
• If after 30 seconds an increase in engine idle speed is not
detected, “RPM NOT DETECTED” will display.
• Some engines may have a higher idle initially after starting,
particularly when the engine is cold. The tester may detect this
without any other action being taken. If this occurs, continue
on with the testing process. The final results will not be affected.
8. The tester now checks the engine at idle and performs the
DIODE/RIPPLE check.
9. When complete, the tester will prompt you to turn on the follow-
ing electrical loads.
• Heater fan set to highest speed. Do not run the A/C or wind-
shield defroster.
• Headlamp high beam
• Rear window defogger
NOTE:
Do not run the windshield wipers or any other cyclical loads.
SEL417X
SEL418X
SEL419X

CHARGING SYSTEM
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NG >> Repair battery terminal connections.
2.CHECK FUSE AND FUSIBLE LINK
Check for blown fuses and fusible link.
OK or NG
OK >> GO TO 3.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
3.CHECK GENERATOR DRIVE BELT TENSION
Check generator drive belt tension. Refer to EM-13, "
Checking Drive Belts".
OK or NG
OK >> Inspection End.
NG >> Repair as needed.
DIAGNOSTIC PROCEDURE 1
Check Charge Warning Lamp Circuit
1.CHECK CHARGE WARNING LAMP CIRCUIT CONNECTION
1. Turn the ignition switch OFF.
2. Check terminal 2 harness connector.
OK or NG
OK >> GO TO 2.
NG >> Repair terminal 2 connection. Confirm repair by performing complete Battery/Starting/Charging
system test. Refer to "Trouble Diagnoses with Battery/Starting/Charging System Tester" .
2.CHECK CHARGE WARNING LAMP CIRCUIT
1. Disconnect E205 connector from generator.
2. Apply ground to connector E205 terminal 2 with the ignition
switch in the ON position.
OK or NG
OK >> GO TO "WORK FLOW" .
NG >> Check the following.
• Charge warning lamp (Combination meter)
• Harness for open or short between combination meter
and fuse
• Harness for open between combination meter and
generator
DIAGNOSTIC PROCEDURE 2
Check Battery Circuit
1.CHECK BATTERY CIRCUIT CONNECTION
1. Turn the ignition switch OFF.
2. Check to see if terminal 1 is clean and tight.
OK or NG
OK >> GO TO 2.
NG >> Repair terminal 1 connection. Confirm repair by performing complete Battery/Starting/Charging
system test. Refer to "Trouble Diagnoses with Battery/Starting/Charging System Tester" .
2.CHECK BATTERY CIRCUIT
Unit Power source (Power supply terminals) Fuse or fusible link
GeneratorBattery (“1” terminal) a
Battery (“3” terminal) 30
Combination meter Ignition switch ON (“2” terminal) 14
CHARGE lamp should light up.
WKIA3184E

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< SERVICE INFORMATION >
CHARGING SYSTEM
Check voltage between generator connector E204 terminal 1 and
ground using a digital circuit tester.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between generator and fusible
link.
3.CHECK VOLTAGE DROP ON BATTERY CIRCUIT
1. Start engine.
2. While engine is running at idle and warm, check voltage
between generator connector E204 terminal 1 and battery posi-
tive terminal using a digital circuit tester.
OK or NG
OK >> GO TO "WORK FLOW" .
NG >> Check harness between the battery and the generator
for poor continuity.
DIAGNOSTIC PROCEDURE 3
Check Voltage Regulator Circuit
1.CHECK VOLTAGE REGULATOR CIRCUIT CONNECTION
1. Turn the ignition switch OFF.
2. Check terminal 3 harness connector.
OK or NG
OK >> GO TO 2.
NG >> Repair terminal 3 connection. Confirm repair by performing complete Battery/Starting/Charging
system test. Refer to "Trouble Diagnoses with Battery/Starting/Charging System Tester" .
2.CHECK VOLTAGE REGULATOR CIRCUIT
Check voltage between generator connector E205 terminal 3 and
ground using a digital circuit tester.
OK or NG
OK >> GO TO "WORK FLOW".
NG >> Check harness for open between generator and fuse.
Removal and InstallationINFOID:0000000003533326
REMOVAL
1. Disconnect the negative battery terminal.
2. Remove the fan shroud. Refer to CO-13, "
Removal and Installation".
3. Remove the drive belt. Refer to EM-13, "
Removal and Installation". Battery voltage should exist.
WKIA2111E
With engine running
at idle and warm.: Less than 0.2V
WKIA3185E
Battery voltage should exist.
WKIA3186E

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< SERVICE INFORMATION >
AUTOMATIC DRIVE POSITIONER
NOTE:
• Disconnecting the battery erases the stored memory.
• After connecting the battery, insert the key into the ignition cylinder and turn the front door switch LH ON (open)→OFF (close)→ON
(open), the entry/exiting function becomes possible.
• After Exiting operation is carried out, return operation can be operated.
NOTE:
During automatic operation, if the ignition switch is turned ON→START, the automatic operation is suspended. When the ignition switch
returns to ON, it resumes.
FA I L - S A F E M O D E
When any manual and automatic operations are not performed, if any motor operations of seats or pedals are
detected for T2 or more, status is judged “Output error”.
CANCEL OF FAIL-SAFE MODE
The mode is cancelled when the A/T selector lever is shifted to P position from any other position.
NOTE:
The front seat LH position and pedal adjustment functions (see the following table) operate simultaneously in
the order of priority.
*: In conjunction with sliding the seat, the door mirrors are positioned.Function Description
Memory operation The front seat LH, steering wheel, pedals (accelerator, brake) and door mirrors move
to the stored driving position by pushing seat memory switch (1 or 2).
Entry/exit-
ing functionExiting operation At exit, the seat moves backward and the steering wheel raises. (Exiting position)
Entry operationAt entry, the seat and steering wheel return from exiting position to the previous driving
position before the exiting operation.
Keyfob interlock operationPerform memory operation, turnout operation and return operation by pressing keyfob
unlock button.
Auto operation temporary stop
conditions.When ignition switch is turned to START during seat memory switch operation and return
operation, seat memory switch operation and return operation is stopped.
Auto operation stop conditions.• When the vehicle speed becomes 7 km/h (4 MPH) or higher (memory switch operation
and entry operation).
• When the setting switch, seat memory switch 1, or 2 are pressed.
• When A/T selector lever is in any position other than P.
• When the door mirror remote control switch is operated (when ignition switch turned to
ON).
• When power seat switch turned ON.
• When pedal adjusting switch turned ON.
• When front seat sliding entry/exiting setting is OFF (entry/exiting operation).
OPERATED PORTION T2
Seat sliding Approx. 0.1 sec.
Seat reclining Same as above
Seat lifting (Front) Same as above
Seat lifting (Rear) Same as above
Steering wheel Same as above
Pedal adjust Same as above
Priority Function Priority Function
1 Seat sliding, (door mirror LH/RH)* 4 Seat reclining
2 Pedal 5 Seat lifter-FR
3 Steering wheel 6 Seat lifter-RR

AUTOMATIC DRIVE POSITIONER
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Driver Seat Control Unit Harness Connector Terminal LayoutINFOID:0000000003533162
Terminal and Reference Value for Driver Seat Control UnitINFOID:0000000003533163
LIIA2449E
Te r m i n a lWire
ColorItem ConditionVoltage (V)
(Approx.)
1 L UART LINE (RX)Pedal adjusting switch ON (FOR-
WARD or BACKWARD operation)
3 L CAN-H — —
6 O Ignition switch (START) Ignition switch (START position) Battery voltage
9 L/R Reclining motor sensor signalON (seat reclining motor opera-
tion)
Other than above 0 or 5
10 W Rear lifting motor sensor signalON (rear lifting motor operation)
Other than above 0 or 5
11 R / BSliding switch BACKWARD sig-
nalON (seat sliding switch BACK-
WARD operation)0
Other than above Battery voltage
12 O/BReclining switch BACKWARD
signalON (seat reclining switch BACK-
WARD operation)0
Other than above Battery voltage
PIIA4813E
SIIA0692J
SIIA0693J

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AUTOMATIC DRIVE POSITIONER
13 L/B Front lifting switch DOWN signalON (front lifting switch DOWN op-
eration)0
Other than above Battery voltage
14 G/W Rear lifting switch DOWN signalON (rear lifting switch DOWN op-
eration)0
Other than above Battery voltage
15 L/YPedal adjusting switch BACK-
WARD signalON (pedal adjusting switch BACK-
WARD operation) 0
Other than above Battery voltage
16 W Seat sensor power Ignition switch ON 5
17 W UART LINE (TX)Pedal adjusting switch ON (FOR-
WARD or BACKWARD operation)
19 P CAN-L — —
21 L/RA/T device (park position switch)
signalA/T selector lever in P position 0
A/T selector lever in other than P
position with ignition key in ignition
cylinderBattery voltage
24 Y/G Seat sliding motor sensor signalON (seat sliding motor operation)
Other than above 0 or 5
25 LG Front lifting motor sensor signalON (front lifting motor operation)
Other than above. 0 or 5
26 P/BSeat sliding switch FORWARD
signalON (seat sliding switch FOR-
WARD operation)0
Other than above Battery voltage
27 G/BSeat reclining switch FORWARD
signalON (seat reclining switch FOR-
WARD operation)0
Other than above Battery voltage
28 Y/B Front lifting switch UP signalON (front lifting switch UP opera-
tion)0
Other than above Battery voltage Te r m i n a lWire
ColorItem ConditionVoltage (V)
(Approx.)
PIIA4814E
PIIA3277E
SIIA0691J

AUTOMATIC DRIVE POSITIONER
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It is possible to set sliding front seat for entry/exit of vehicle by pressing set switch.
*: Setting of sliding front seat for entry/exit of vehicle is ON at factory-shipment. But if custom settings are reset, setting turns OFF.
NOTE:
After the setting is registered, the new setting is effective, even if the battery is disconnected.
BCM Power Supply and Ground Circuit InspectionINFOID:0000000003533168
Refer to BCS-15, "BCM Power Supply and Ground Circuit Inspection".
Power Supply and Ground Circuit InspectionINFOID:0000000003533169
1.CHECK DRIVER SEAT CONTROL UNIT FUSES AND FUSIBLE LINK
Make sure any of the following fuses in the driver seat control unit and automatic drive positioner control unit
are not blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
2.CHECK DRIVER SEAT CONTROL UNIT POWER SUPPLY CIRCUIT
1. Disconnect driver seat control unit.
2. Check voltage between driver seat control unit connector and
ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3.CHECK DRIVER SEAT CONTROL UNIT GROUND CIRCUIT
Content Setting change operation Indicator LEDs
The seat sliding and steering
wheel raise turnout and return
at entry/exit can be operated.
Press the set switch for more than 10 secondsBlinking twice
The seat sliding and steering
wheel raise turnout and return
at entry/exit can be not operat-
ed.Blinking once
Unit Power source Fuse No.
Driver seat control unit START power supply 2 (10A)
Driver seat control unit and automatic
drive positionercontrol unitBattery power supply 22 (15A)
Battery power supplyf (50A)
ConnectorTe r m i n a l s
Power
sourceConditionVoltage (V)
(Approx.)
(+) (-)
P333 GroundBattery
power
supplyIgnition
switch
OFFBattery
voltage
40 GroundBattery
power
supplyIgnition
switch
OFFBattery
voltage
P2 6 GroundSTART
power
supplyIgnition
switch
STARTBattery
voltage
PIIA4819E

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AUTOMATIC DRIVE POSITIONER
1. Turn ignition switch OFF.
2. Check continuity between the driver seat control unit connector
P2 terminal 32, P3 terminal 48 and ground.
OK or NG
OK >> Driver seat control unit circuit check is OK. Check the
automatic drive positioner control unit. GO TO 4.
NG >> Repair or replace harness.
4.CHECK AUTOMATIC DRIVE POSITIONER CONTROL UNIT POWER SUPPLY CIRCUIT
1. Disconnect automatic drive positioner control unit.
2. Check voltage between automatic drive positioner control unit
connector M34 terminals 34, 39 and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace harness.
5.CHECK AUTOMATIC DRIVE POSITIONER CONTROL UNIT GROUND CIRCUIT
Check continuity between the automatic drive positioner control unit
connector M34 terminals 40, 48 and ground.
OK or NG
OK >> Automatic drive positioner control unit circuit is OK.
NG >> Repair or replace harness.
CONSULT-II Function (AUTO DRIVE POS.)INFOID:0000000003533170
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following. 32 - Ground : Continuity should exist.
48 - Ground : Continuity should exist.
PIIA4542E
ConnectorTe r m i n a l s
Power
sourceConditionVoltage (V)
(Approx.)
(+) (-)
M3434 GroundBattery
power
supplyIgnition
switch
OFFBattery
voltage
39 GroundBattery
power
supplyIgnition
switch
OFFBattery
voltage
PIIA4543E
40 - Ground : Continuity should exist.
48 - Ground : Continuity should exist.
PIIA4544E
AUTO DRIVE POS.
diagnostic modeDescription
WORK SUPPORTSupports inspections and adjustments. Commands are transmitted to the driver seat
control unit for setting the status suitable for required operation, input/output signals
are received from the driver seat control unit and received data is displayed.
SELF-DIAG RESULTS Displays driver seat control unit self-diagnosis results.
DATA MONITOR Displays driver seat control unit input/output data in real time.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
ECU PART NUMBER Driver seat control unit part number can be read.

AUTOMATIC DRIVE POSITIONER
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CONSULT-II START PROCEDURE
Refer to GI-36, "CONSULT-II Start Procedure".
SELF-DIAGNOSIS RESULTS
DISPLAY ITEM LIST
NOTE:
• If park switch error is detected, manual adjustable pedal operation cannot be performed when ignition switch
turns ON.
• The displays of CAN communication and detection switch display error detecting condition from memory
erase to the present on “TIME”.
- If error is detected in the past and present error is detected, “CRNT” is displayed.
- If error is detected in the past and present error is not detected, “PAST” is displayed.
- If error has never been detected, nothing is displayed on “TIME”.
• Any items other than CAN communication and park switch count error detection frequency occurred after
erase history to “1-127”.
- If error was detected in the past, error detection frequency from memory erase to the present is displayed on
“TIME”.
- If error has never been detected, nothing is displayed on “TIME”.
- Can clear the detected memory.
Normal: Clear memory in normal condition, history is erased and nothing is displayed on “TIME”.
Error: Clear memory in error condition, error is detected again and “1” is displayed on “TIME”.
DATA MONITOR
SELECTIOM FROM MENU
CONSULT-II display Item Malfunction is detected when...Reference
page
CAN COMM CIRC
[U1000]CAN communication Malfunction is detected in CAN communication. SE-35
SEAT SLIDE
[B2112]Seat slide motorWhen any manual and automatic operations are not performed, if any
motor operations of seat slide is detected for 0.1 second or more, sta-
tus is judged “Output error”.SE-37
SEAT RECLINING
[B2113]Seat reclining motorWhen any manual and automatic operations are not performed, if any
motor operations of seat reclining is detected for 0.1 second or more,
status is judged “Output error”.SE-38
SEAT LIFTER FR
[B2114]Seat lifting FR motorWhen any manual and automatic operations are not performed, if any
motor operations of seat lifting FR is detected for 0.1 second or more,
status is judged “Output error”.SE-39
SEAT LIFTER RR
[B2115]Seat lifting RR motorWhen any manual and automatic operations are not performed, if any
motor operations of seat lifting RR is detected for 0.1 second or more,
status is judged “Output error”.SE-40
STEERING TILT
[B2116]Steering tilt motorWhen any manual and automatic operations are not performed, if any
motor operations of tilt is detected for 0.1 second or more, status is
judged “Output error”.SE-45
TILT SENSOR
[B2118]Steering tilt sensorWhen steering tilt sensor detects 0.5V or lower, or 4.5V or higher, for
0.5 seconds or more.SE-54
ADJ PEDAL MO-
TOR
[B2117]Pedal adjust motorWhen any manual and automatic operations are not performed, if mo-
tor operations of seat pedal is detected for 0.1 second or more, status
is judged “Output error”.SE-41
ADJ PEDAL SEN-
SOR
[B2120]Pedal adjust sensorWhen pedal adjust sensor detects 0.5V or lower, or 4.5V or higher, for
0.5 seconds or more.SE-50
DETENT SW
[B2126]Park SWWith the A/T selector lever in P position (park position switch OFF), if
the vehicle speed of 7 km/h (4 MPH) or higher was input the park po-
sition switch input system is judged malfunctioning.SE-69
UART COMM
[B2128]UART communica-
tionMalfunction is detected in UART communication.SE-73

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< SERVICE INFORMATION >
AUTOMATIC DRIVE POSITIONER
ACTIVE TEST
CAUTION:
During vehicle driving, do not perform active test.
NOTE:
Monitor item [OPERATION or UNIT] Contents
SLIDE SW-FR “ON/OFF” ON/OFF status judged from the sliding switch (FR) signal is displayed.
SLIDE SW-RR “ON/OFF” ON/OFF status judged from the sliding switch (RR) signal is displayed.
RECLN SW-FR “ON/OFF” ON/OFF status judged from the reclining switch (FR) signal is displayed.
RECLN SW-RR “ON/OFF” ON/OFF status judged from the reclining switch (RR) signal is displayed.
LIFT FR SW-UP “ON/OFF” ON/OFF status judged from the FR lifter switch (UP) signal is displayed.
LIFT FR SW-DN “ON/OFF” ON/OFF status judged from the FR lifter switch (DOWN) signal is displayed.
LIFT RR SW-UP “ON/OFF” ON/OFF status judged from the RR lifter switch (UP) signal is displayed.
LIFT RR SW-DN “ON/OFF” ON/OFF status judged from the RR lifter switch (DOWN) signal is displayed.
MIR CON SW-UP “ON/OFF”ON/OFF status judged from the door mirror remote control switch (UP) signal is dis-
played.
MIR CON SW-DN “ON/OFF”ON/OFF status judged from the door mirror remote control switch (DOWN) signal
is displayed.
MIR CON SW-RH “ON/OFF”ON/OFF status judged from the door mirror remote control switch (RIGHT) signal
is displayed.
MIR CON SW-LH “ON/OFF”ON/OFF status judged from the door mirror remote control switch (LEFT) signal is
displayed.
MIR CHNG SW-R “ON/OFF”ON/OFF status judged from the door mirror remote control switch (switching to
RIGHT) signal is displayed.
MIR CHNG SW-L “ON/OFF”ON/OFF status judged from the door mirror remote control switch (switching to
LEFT) signal is displayed.
SET SW “ON/OFF” ON/OFF status judged from the setting switch signal is displayed.
TILT SW-UP “ON/OFF” ON/OFF status judged from the tilt adjusting switch (UP) signal is displayed.
PEDAL SW-FR “ON/OFF” ON/OFF status judged from the pedal adjusting switch (FR) signal is displayed.
PEDAL SW-RR “ON/OFF” ON/OFF status judged from the pedal adjusting switch (RR) signal is displayed.
MEMORY SW1 “ON/OFF” ON/OFF status judged from the seat memory switch 1 signal is displayed.
MEMORY SW2 “ON/OFF” ON/OFF status judged from the seat memory switch 2 signal is displayed.
DETENT SW “ON/OFF”The A/T selector lever position “OFF (P position) / ON (other than P position)”
judged from the park position switch signal is displayed.
STARTER SW “ON/OFF”Ignition key switch ON (START, ON) /OFF (ignition switch IGN, ACC, or OFF) sta-
tus judged from the ignition switch signal is displayed.
SLIDE PULSE —Value (32768) when battery connects is as standard. If it moves BACKWARD, the
value increases. If it moves FORWARD, the value decreases.
RECLN PULSE —Value (32768) when battery connects is as standard. If it moves BACKWARD, the
value increases. If it moves FORWARD, the value decreases.
LIFT FR PULSE —Value (32768) when battery connects is as standard. If it moves DOWN, the value
increases. If it moves UP, the value decreases.
LIFT RR PULSE —Value (32768) when battery connects is as standard. If it moves DOWN, the value
increases. If it moves UP, the value decreases.
MIR/SEN RH R-L “V” Voltage output from RH door mirror sensor (LH/RH) is displayed.
MIR/SEN RH U-D “V” Voltage output from RH door mirror sensor (UP/DOWN) is displayed.
MIR/SEN LH R-L “V” Voltage output from LH door mirror sensor (LH/RH) is displayed.
MIR/SEN LH U-D “V” Voltage output from LH door mirror sensor (UP/DOWN) is displayed.
PEDAL SEN “V”The pedal position (voltage) judged from the pedal adjust sensor signal is dis-
played.