2008 INFINITI FX35 lumbar support

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BODY
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SECTION SE
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CONTENTS
SEAT
SERVICE INFORMATION .. ..........................3
DTC INDEX ..................................................... .....3
U1000 .................................................................. ......3
B2112-B2128 ............................................................3
PRECAUTIONS ...................................................4
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
4
Service Notice ...........................................................4
PREPARATION ...................................................5
Special Service Tool ........................................... ......5
Commercial Service Tool ..........................................5
SQUEAK AND RATTLE TROUBLE DIAG-
NOSES ................................................................
6
Work Flow ........................................................... ......6
Generic Squeak and Rattle Troubleshooting ............8
Diagnostic Worksheet .............................................10
AUTOMATIC DRIVE POSITIONER ...................12
System Description ............................................. ....12
Component Parts and Harness Connector Loca-
tion ..........................................................................
16
CAN Communication System Description ...............17
CAN Communication Unit .......................................17
Schematic ...............................................................18
Wiring Diagram - AUT/DP - .....................................20
Terminal and Reference Value for BCM .................32
Terminal and Reference Value for Automatic
Drive Positioner Control Unit ...................................
32
Terminal and Reference Value for Driver Seat
Control Unit .............................................................
34
Work Flow ...............................................................37
Preliminary Check ...................................................37
CONSULT-III Function (AUTO DRIVE POS.) .........40
Check CAN Communication System ......................42
Symptom Chart .......................................................43
Check Sliding Motor Circuit .....................................44
Check Reclining Motor Circuit ............................. ....45
Check Front Lifting Motor Circuit .............................46
Check Rear Lifting Motor Circuit ..............................47
Check Telescopic Motor Circuit ...............................48
Check Tilt Motor Circuit ...........................................49
Check Driver Side Mirror Motor Circuit ....................50
Check Passenger Side Mirror Motor Circuit ............52
Check Sliding Sensor Circuit ...................................53
Check Reclining Sensor Circuit ...............................54
Check Front Lifting Sensor Circuit ...........................55
Check Rear Lifting Sensor Circuit ...........................56
Check Telescopic Sensor Circuit .............................57
Check Tilt Sensor Circuit .........................................58
Check Driver Side Mirror Sensor Circuit ..................59
Check Passenger Side Mirror Sensor Circuit ..........60
Check Steering and Door Mirror Sensor Power
Supply and Ground Circuit .................................. ....
61
Check Front Door Switch (Driver Side) Circuit ........62
Check Sliding Switch Circuit ....................................63
Check Reclining Switch Circuit ................................64
Check Front Lifting Switch Circuit ............................66
Check Rear Lifting Switch Circuit ............................67
Check Power Seat Switch Ground Circuit ...............68
Check Telescopic Switch Circuit .............................68
Check Tilt Switch Circuit ..........................................70
Check Door Mirror Remote Control Switch
(Changeover Switch) Circuit ................................ ....
71
Check Door Mirror Remote Control Switch (Mirror
Switch) Circuit ...................................................... ....
73
Check A/T Device (Park Position Switch) Circuit ....74
Check Key Switch Circuit (With Intelligent Key) ......76
Check Key Switch Circuit (Without Intelligent Key) ....77
Check Seat Memory Switch Circuit ..................... ....78
Check Seat Memory Indicator Lamp Circuit ............79
Check UART Communication Line Circuit ...............80
Check Lumbar Support Circuit ............................ ....82
POWER SEAT ...................................................84
Wiring Diagram - SEAT - .........................................84
HEATED SEAT .................................................86
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AUTOMATIC DRIVE POSITIONERSE-17
< SERVICE INFORMATION >
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CAN Communication System DescriptionINFOID:0000000001328099
CAN (Controller Area Network) is a serial communication li ne for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN Communication UnitINFOID:0000000001328100
Refer to LAN-43, "CAN System Specification Chart".
1. a: 10A 38 fuse (With Intelligent Key)
b: 50A M fusible link 2. a: Fuse block (J/B) M1, M2
b: BCM M3, M4, B14
(View with the dash side LH removed) 3. Fuse block (J/B) fuse layout
4. a: Automatic drive positioner control unit M49, M50
b: A/T device (park position switch)
M67
(View with the center console re-
moved) 5. Tilt motor and telescopic motor M27
Tilt sensor and telescopic sensor M28
(View with the instrument driver lower
panel removed) 6. Seat memory switch D22
7. a: Power seat switch B175 b: Sliding switch & Lifting switch
(front & rear)
c: Reclining switch
d: Lumbar support switch B158 8. a: Lumbar support motor B172
b: Reclining motor B166 9. a: Sliding motor B161
b: Lifting motor (front) B164
c: Lifting motor (rear) B162
d: Driver seat control unit B152,
B153
10. ADP steering switch M13 11. Key switch connector M23 (Without Intelligent Key)12. Key switch and ignition knob switch
connector M22
(With Intelligent Key)
13. Front door switch (Driver side) B26 14. Door mirro r (Driver side) D2 15. Door mirror (Passenger side) D32
16. Door mirror remote control switch M18 17. Unified meter and A/C amp. M55
(View with the clus ter lid C removed)
PIIB8566E
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SE-44
< SERVICE INFORMATION >
AUTOMATIC DRIVE POSITIONER
Check Sliding Motor Circuit
INFOID:0000000001328111
1.CHECK SEAT SLIDING MECHANISM
Check the following.
 Operation malfunction caused by sliding rail deformation or pinched harness or other foreign materials
 Operation malfunction caused by foreign materials adhered to the sliding motor or sliding rail connector rod
 Operation malfunction and interference wit h other parts by poor installation
OK or NG
OK >>  GO TO 2 (With CONSULT-III).  GO TO 3 (Without CONSULT-III).
NG >> Repair the malfunctioning part and check again.
2.CHECK FUNCTION
With CONSULT-III
Check operation with “SEAT SLIDE” in ACTIVE TEST.
OK or NG
OK >> Sliding motor circuit is OK.
NG >> GO TO 3.
3.CHECK SLIDING MOTOR HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit connector and sliding motor connector.
A part of steering tilt, telescopic and door mirror does not
operate (only manual operation). 1. Check door mirror remote
control switch (changeover
switch) circuit SE-71
2. Check door mirror remote co
ntrol switch (mirror switch)
circuit SE-73
3. Check tilt switch circuit
SE-70
4. Check telescopic switch circuitSE-68
5. If the above systems are normal, replace the
automatic drive positioner control unit SE-16
Only seat memory switch operation dose not operate. 1. Check seat memory switch circuit
SE-782. If the above systems are normal, replace the driver
seat control unit SE-16
Seat memory indicator lamps 1 and 2 do not illuminate. 1. Check seat memory indicator lamp circuit
SE-792. If all the above systems are normal, replace the driver
seat control unit SE-16
The Entry/Exiting does not operated when door is opened
and closed. (The Entry/Exiting operates with key switch) 1. Check front door switch
(driver side) circuit SE-62
2. If all the above systems are normal, replace the BCM BCS-13
Only seat sliding, seat reclining and seat lifting (front and
rear) operations do not operate.Check power seat switch ground circuit
SE-68
Only lumbar support does not operate. Check lumbar support circuit SE-82
Symptom Diagnoses / service procedureRefer to
page
Test item Description
SEAT SLIDE The sliding motor is activated by receiving the drive signal.
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SE-82
< SERVICE INFORMATION >
AUTOMATIC DRIVE POSITIONER
 When voltage signal dose not appear with a constant voltage (approx. 5V), replace automatic
driver seat control unit.
 When voltage signal dose not appear with a constant voltage (approx. 0V), replace driver seat
control unit.
4.CHECK DRIVER SEAT CONTROL UNIT
Dose the automatic drive positioner operate, when the driver seat control unit exchanged?
Does seat memory function operate?
YES >> Replace automatic drive positioner control unit.
NG >> Replace driver seat control unit.
Check Lumbar Support CircuitINFOID:0000000001328144
1.CHECK LUMBAR SUPPORT SWITCH
1. Turn ignition switch OFF.
2. Disconnect lumbar support switch connector.
3. Check voltage between lumbar support switch connector B158 terminal 1 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness between fuse block (J/B) and lumbar support switch.
2.CHECK LUMBAR SUPPORT SWITCH
Lumbar support switch operate, check continuity lum bar support switch connector B158 terminal 31, 32 and 1,
16B.
OK or NG
OK >> GO TO 3.
NG >> Replace lumbar support switch.
3.CHECK LUMBAR SUPPORT MOTOR HARNESS
1. Disconnect lumbar support motor connector.
2. Check continuity between lumbar support switch connector B158 terminal 31, 32 and lumbar support motor connector B172
terminal 31, 32.
3. Check continuity between lumbar support switch connector B158 terminal 31, 32 and ground.1 (R) – Ground: : Battery voltage
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Con-
nector Te r m i n a l
Lumbar support switch
condition Continuity
B158 31
1 BACKWARD Yes
16B Other than above No
32 1FORWARD Yes
16B Other than above No
PIIB8601E
31 (W) − 31 (W) : Continuity should exist.
32 (L) − 32 (L) : Continuity should exist.
31 (W) − Ground : Continuity should not exist.
32 (L) − Ground : Continuity should not exist.
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AUTOMATIC DRIVE POSITIONERSE-83
< SERVICE INFORMATION >
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OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness between lumbar support switch and lumbar support motor.
4.CHECK LUMBAR SUPPORT SWITCH GROUND CIRCUIT
Check continuity between lumbar support switch connector B158
terminal 16B and ground.
OK or NG
OK >> Check the condition of the harness and connector.
NG >> Repair or replace harness between lumbar support switch and ground.
16B (B) – Ground : Continuity should exist.
PIIB8603E
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