ignition INFINITI QX56 2004 Factory Service Manual

SC-26
CHARGING SYSTEM
Revision: August 20072004 QX56
DIAGNOSTIC PROCEDURE 5
Check Terminal "4" Circuit
1. CHECK “4” TERMINAL CONNECTION
1. Turn the ignition switch OFF.
2. Check to see if “4” terminal is clean and tight.
OK or NG
OK >> GO TO 2.
NG >> Repair “4” terminal connection. Confirm repair by performing complete Battery/Starting/Charging
system test.
2. CHECK GENERATOR “4” TERMINAL CIRCUIT
Check voltage between generator connector E205 terminal 4 (Y/B)
and ground using a digital circuit tester.
OK or NG
OK >> GO TO 3.
NG >> Check the following.

10A fuse (No. 30, located in fuse and fusible link box)

Harness for open or short between generator and
fuse
3. CHECK “4” TERMINAL CONNECTION QUALITY (VOLTAGE DROP TEST)
1. Start the engine.
2. Check voltage between generator connector E205 terminal 4 (Y/
B) and battery positive terminal using a digital circuit tester.
OK or NG
OK >> Replace the generator. Refer to SC-27, "Removal and
Installation" . Confirm repair by performing complete
Battery/Starting/Charging system test.
NG >> Check harness between the battery and the generator
for poor continuity. Battery voltage should exist.
WKIA2113E
With engine running
at idle and warm.: Less than 0.2V
WKIA2114E

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AUTOMATIC DRIVE POSITIONER
Revision: August 20072004 QX56
Manual OperationEIS002Y4
The driving position [seat position, steering wheel, pedal position (accelerator, brake) and door mirror position]
can be adjusted with the power seat switch LH, pedal adjusting switch, door mirror switch or ADP steering
switch.
NOTE:

The door mirrors can be manually operated with the ignition switch turned to ACC or ON.

Only when A/T selector lever is in P position, adjusting pedal operates (except when ignition switch turned
to OFF).

If A/T device (detent switch) error is detected, manual adjustable pedal operation cannot be performed
when ignition switch turns ON.
Automatic OperationEIS002Y5
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.
System DescriptionEIS002Y6

The system automatically moves the driver seat and steering wheel to facilitate entry/exit to/from the vehi-
cle. The driver seat control unit can also store the optimum driving positions (front seat, pedal position and
door mirror position) for 2 people. One-touch operation allows changing between driving positions.
7. A. Tilt motor M68, M69
B. ADP steering switch M16
C. Pedal adjusting switch M968. A. Door mirrror LH D4, Door mirror
RH D107
B. Front door switch LH B8
C. Front door lock assembly LH (key
cylinder switch) D149. A. A/T selector lever
B. A/T device M203
10. A. Sliding motor LH P4 (Driver seat
view), reclining motor LH P5, lifting
motor (front) P6, lifting motor (rear)
P7
B. Driver seat control unit P2, P3
C. Power seat switch LH P8
Function Description
Memory operation The seat, steering wheel, pedal (accelerator, brake) and door mirror 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 driv-
ing position before the Exiting operation.
Keyfob interlock operationPerform memory operation, turnout operation and return operation by pressing key-
fob 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 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).

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AUTOMATIC DRIVE POSITIONER
Revision: August 20072004 QX56
KEYFOB INTERLOCK OPERATION

The system performs memory operation, exiting operation and return operation by pressing keyfob unlock
button.
NOTE:

If Entry/Exiting operation is cancelled, the system performs memory operation only.

If ignition switch turns ON in the middle of memory operation, the system does not perform exiting opera-
tion after memory operation.

If ignition switch turns ON in the middle of exiting operation, entry operation starts at that time.
CAN Communication System DescriptionEIS002Y8
Refer to LAN-5, "CAN COMMUNICATION" .
LIIA1667E

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Terminals and Reference Values for BCMEIS0038I
Terminals and Reference Values for Driver Seat Control UnitEIS0038J
TERMINAL WIRE
COLORITEM CONDITIONVOLTAGE (V)
(Approx.)
11 O Ignition switch (ACC or ON) Ignition switch (ACC or ON position) Battery voltage
38 W/L Ignition switch (ON or START)Ignition switch (ON or START posi-
tion)Battery voltage
39 W CAN-H — —
40 R CAN-L — —
47 SB Front door switch LH ON (Open) → OFF (Closed) 0 → Battery voltage
67 B Ground — 0
70 W/BBattery power supply (Fusible
link)— Battery voltage
TERMINALWIRE
COLORITEM CONDITIONVOLTAGE (V)
(Approx.)
1 L UART LINE (RX)Pedal adjusting switch ON (FOR-
WARD or BACKWARD operation)
3 W 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
13 L/B Front lifting switch DOWN signalON (front lifting switch DOWN
operation)0
Other than above Battery voltage
PIIA4813E
SIIA0692J
SIIA0693J

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AUTOMATIC DRIVE POSITIONER
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14 G/W Rear lifting switch DOWN signalON (rear lifting switch DOWN
operation)0
Other than above Battery voltage
15 LPedal 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 R CAN-L — —
21 L/R A/T device (detent switch) signalSelector lever in P position 0
Selector lever other than P posi-
tion with ignition key in ignition cyl-
inderBattery 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 FOR-
WARD 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
29 R/W Rear lifting switch UP signalON (rear lifting switch UP opera-
tion)0
Other than above Battery voltage
30 RPedal adjusting switch FOR-
WARD signalON (pedal adjusting switch FOR-
WARD operation)0
Other than above Battery voltage TERMINALWIRE
COLORITEM CONDITIONVOLTAGE (V)
(Approx.)
PIIA4814E
PIIA3277E
SIIA0691J

AUTOMATIC DRIVE POSITIONER
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2. CHECK BCM POWER SUPPLY CIRCUIT
1. Disconnect BCM.
2. Check voltage between BCM connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK BCM GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between BCM connector M20 terminal 67 (B) and ground.
OK or NG
OK >> BCM circuit is OK. Check the driver seat control unit.
GO TO 4.
NG >> Repair or replace harness.
4. CHECK CONTROL UNIT FUSES
Make sure any of the following fuses for the driver seat control unit and automatic drive positioner control unit
are not blown.
NOTE:
Refer to SE-11, "
Component Parts And Harness Connector Location" .
OK or NG
OK >> GO TO 5.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to SE-
11 , "Component Parts And Harness Connector Location" .
ConnectorTe r m i n a l s
(Wire color)Power
sourceConditionVoltage (V)
(Approx.)
(+) (–)
M20 70 (W/B) GroundBattery
power
supplyIgnition
switch
OFFBattery voltage
M1838 (W/L) GroundIgnition
power
supplyIgnition
switch
ONBattery voltage
11 ( O ) G r o u n dACC
power
supplyIgnition
switch
ACCBattery voltage
LIIA0995E
67 (B) - Ground : Continuity should exist.
LIIA0915E
Unit Power source Fuse No.
Driver seat control unit START power supply 2 (10A)
Driver seat control unit and automatic
drive positioner control unitBattery power supply 22 (15A)
Battery power supplyf (50A)

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AUTOMATIC DRIVE POSITIONER
Revision: August 20072004 QX56
5. 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 6.
NG >> Repair or replace harness.
6. CHECK DRIVER SEAT CONTROL UNIT GROUND CIRCUIT
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, GO TO 7.
NG >> Repair or replace harness.
7. CHECK AUTOMATIC DRIVE POSITIONER CONTROL UNIT POWER SUPPLY CIRCUIT
1. Disconnect automatic drive positioner control unit connector.
2. Check voltage between automatic drive positioner control unit connector M34 terminals 34, 39 and
ground.
OK or NG
OK >> GO TO 8.
NG >> Repair or replace harness.
ConnectorTe r m i n a l s
(Wire color)Power
sourceConditionVoltage (V)
(Approx.)
(+) (–)
P333 (W/L) GroundBattery
power
supplyIgnition
switch
OFFBattery
voltage
40 (Y/R) GroundBattery
power
supplyIgnition
switch
OFFBattery
voltage
P2 6 (O) GroundSTART
power
supplyIgnition
switch
STARTBattery
voltage
PIIA4819E
32 (B) - Ground : Continuity should exist.
48 (B) - Ground : Continuity should exist.
PIIA4542E
ConnectorTe r m i n a l s
(Wire color)Power
sourceConditionVoltage (V)
(Approx.)
(+) (–)
M3434 (Y/R) GroundBattery
power
supplyIgnition
switch
OFFBattery
voltage
39 (W/L) GroundBattery
power
supplyIgnition
switch
OFFBattery
voltage
PIIA4543E

AUTOMATIC DRIVE POSITIONER
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8. 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.) EIS002YG
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II INSPECTION PROCEDURE
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
1. Turn ignition switch OFF.
2. Connect CONSULT-II and CONSULT-II CONVERTER to the
data link connector.
3. Turn ignition switch ON.
4. Touch “START (NISSAN BASED VHCL)”.40 (B/W) - Ground : Continuity should exist.
48 (B) - 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.
BBIA0369E
BCIA0029E

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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”.
CONSULT-II display Item Malfunction is detected when...Reference
page
CAN COMM CIRC
[U1000]CAN communication Malfunction is detected in CAN communication. SE-41
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, status is judged “Output error”.SE-43
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-44
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-46
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-47
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-53
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-64
ADJ PEDAL
MOTOR
[B2117]Pedal adjust motorWhen any manual and automatic operations are not performed, if
motor operations of seat pedal is detected for 0.1 second or more,
status is judged “Output error”.SE-49
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-59
DETENT SW
[B2126]Park SWWith the A/T shift lever in P position (Park switch OFF), if the vehicle
speed of 7 km/h (4 MPH) or higher was input the park switch input
system is judged malfunctioning.SE-81
UART COMM
[B2128]UART communica-
tionMalfunction is detected in UART communication.SE-85

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Revision: August 20072004 QX56
DATA MONITOR
CAN DIAGNOSIS SUPPORT MONITOR
SELECTIOM FROM MEMU
Monitor item [UNIT] Contents
CAN COMM [OK/NG] When CAN communication circuit is malfunctioning, it displays “NG”.
CAN CIRC 1 [OK/UNKWN]
Displays [OK/UNKWN] condition of the CAN communication judged by each sig-
nal input. CAN CIRC 2 [OK/UNKWN]
CAN CIRC 3 [OK/UNKWN]
CAN CIRC 4 [OK/UNKWN]
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 switch (UP) signal is displayed.
MIR CON SW–DN “ON/OFF” ON/OFF status judged from the door mirror switch (DOWN) signal is displayed.
MIR CON SW–RH “ON/OFF” ON/OFF status judged from the door mirror switch (RIGHT) signal is displayed.
MIR CON SW–LH “ON/OFF” ON/OFF status judged from the door mirror switch (LEFT) signal is displayed.
MIR CHNG SW–R “ON/OFF”ON/OFF status judged from the door mirror switch (switching to RIGHT) signal is
displayed.
MIR CHNG SW–L “ON/OFF”ON/OFF status judged from the door mirror 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 selector lever position “OFF (P position) / ON (other than P position)” judged
from the park switch signal is displayed.
STARTER SW “ON/OFF”Ignition key switch ON (START, ON) /OFF (ignition switch IGN, ACC, or OFF)
status 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.