Nissan Murano Z50 (2006 year). Manual — part 194
AUTOMATIC DRIVE POSITIONER
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ACTIVE TEST
CAUTION:
During vehicle driving, do not perform active test.
NOTE:
If active test is performed, reset seat memory and key fob interlock drive positioner after performing work.
DISPLAY ITEM LIST
Check CAN Communication System Inspection
NIS001FE
1.
CHECK SELF-DIAGNOSTIC RESULT
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 carry out CAN communication.
With CONSULT-II
1.
Connect CONSULT-II, and turn ignition switch ON.
2.
Touch “AUTO DRIVE POS.” on “SELECT SYSTEM” screen.
3.
Touch “SELF-DIAG RESULTS” on “SELECT DIAG MODE” screen.
4.
Check display content in self-diagnostic results.
Displayed U1000?
Yes
LAN-3, "Precautions When Using CONSULT-II"
No
>> Inspection END.
Symptom Chart
NIS001FF
Test item
Description
SEAT SLIDE
The sliding motor is activated by receiving the drive signal.
SEAT RECLINING
The reclining motor is activated by receiving the drive signal.
SEAT LIFTER FR
The front end lifter motor is activated by receiving the drive signal.
SEAT LIFTER RR
The rear end lifter motor is activated by receiving the drive signal.
PEDAL MOTOR
The pedal adjust motor is activated by receiving the drive signal.
MEMORY SW INDCTR
The memory switch indicator is lit by receiving the drive signal.
MIRROR MOTOR RH
The RH mirror motor moves the mirror UP/DOWN and LEFT/RIGHT by receiving the drive signal.
MIRROR MOTOR LH
The LH mirror motor moves the mirror UP/DOWN and LEFT/RIGHT by receiving the drive signal.
Symptom
Diagnoses / service procedure
Refer to
page
Only setting change function cannot be set with display.
1. Preliminary check
2. CAN communication inspection using CONSULT-II
(self-diagnosis)
3. If the above system are
normal, check display system
Navigation system
A part of seat system does not operate
(both automatically and manually).
1. Check sliding motor circuit
2. Check reclining motor circuit
3. Check front lifting motor circuit
4. Check rear lifting motor circuit
5. If the above systems are normal, replace the driver seat
control unit
A part of pedal adjust and door mirror does not operate
(both automatically and manually).
1. Check pedal adjusting motor circuit
2. Check mirror motor LH circuit
3. Check mirror motor RH circuit
4. If the above systems are normal, replace the automatic
drive positioner control unit.
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A part of seat system does not operate
(only automatic operation).
1. Check sliding sensor circuit
2. Check reclining sensor circuit
3. Check front lifting sensor circuit
4. Check rear lifting sensor circuit
5. If the above systems are normal, replace the driver seat
control unit
A part of door mirror system does not operate
(only automatic operation).
1. Check mirror sensor LH circuit
2. Check mirror sensor RH circuit
3. If the above systems are normal, replace the automatic
drive positioner control unit.
All the automatic operations do not operate.
1. Check key switch circuit
2. Check detention switch circuit
3. Check UART communication line circuit
4. Check pedal adjusting sensor circuit
5. If all the above systems are normal, replace the automatic
drive positioner control unit.
A part of seat system does not operate
(only manual operation).
1. Check sliding switch circuit
2. Check reclining switch circuit
3. Check front lifting switch circuit
4. Check rear lifting switch circuit
5. If the above systems are normal, replace the driver seat
control unit
A part of pedal adjust and door mirror does not operate
(only manual operation).
1. Check pedal adjusting switch circuit
2. Check door mirror remote control switch (change over
switch) circuit
3. Check door mirror remote control switch (mirror switch)
switching circuit
4. If the above systems are normal, replace the automatic
drive positioner control unit
Only memory switch operation.
1. Check seat memory switch circuit
2. If the above systems are normal, replace the driver seat
control unit
Seat memory indicator lamps 1 and 2 do not illuminate.
1. Check seat memory indicator lamp circuit
2. If all the above systems are normal, replace the driver seat
control unit.
The Entry/Exiting does not operated when door is
opened and closed.
(The Entry/Exiting operates with key switch)
1. Check front door switch circuit
2. If all the above systems are normal, replace the BCM.
Only door mirror system does not operate
(only manual operation).
Check door mirror remote control switch ground circuit
Only door mirror system does not operated
(only automatic operation).
Check door mirror sensor power supply and ground circuit
Only seat system does not operate
(only manual operation).
Check power seat switch ground circuit
Only lumbar support does not operate.
Check lumbar support circuit
Symptom
Diagnoses / service procedure
Refer to
page
AUTOMATIC DRIVE POSITIONER
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Check Sliding Motor Circuit
NIS001FG
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 with other parts by poor installation
OK or NG
OK
>> GO TO 2.
NG
>> Repair the malfunctioning part and check again.
2.
CHECK FUNCTION
With CONSULT-II
Check operation with “SEAT SLIDE” in ACTIVE TEST.
Without CONSULT-II
GO TO 3.
OK or NG
OK
>> Sliding motor circuit is OK.
NG
>> GO TO 3.
3.
CHECK SLIDING MOTOR CIRCUIT HARNESS CONTINUITY
1.
Turn ignition switch OFF.
2.
Disconnect driver seat control unit connector and sliding motor connector.
3.
Check continuity between driver seat control unit connector
B304 terminals 35, 42 and sliding motor connector B307 termi-
nals 35, 42.
4.
Check continuity between driver seat control unit connector
B304 terminals 35, 42 and ground.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace harness between driver seat control unit and sliding motor.
Test item
Description
SEAT SLIDE
The sliding motor is activated by receiving the drive signal.
PIIA0265E
35 (W) – 35 (W)
: Continuity should exist.
42 (BR) – 42 (BR)
: Continuity should exist.
35 (W) – Ground
: Continuity should not exist.
42 (BR) – Ground
: Continuity should not exist.
PIIA4545E
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4.
CHECK DRIVER SEAT CONTROL UNIT OUTPUT SIGNAL
1.
Connect the driver seat control unit connector and sliding motor connector.
2.
Check voltage between driver seat control unit connector and
ground.
OK or NG
OK
>> Replace sliding motor.
NG
>> Replace driver seat control unit.
Check Reclining Motor Circuit
NIS001FH
1.
CHECK SEAT RECLINING MECHANISM
Check the following.
●
Operation malfunction caused by an interference with the center pillar or center console
●
Operation malfunction and interference with other parts by poor installation
OK or NG
OK
>> GO TO 2.
NG
>> Repair the malfunctioning part and check again.
2.
CHECK FUNCTION
With CONSULT-II
Check operation with “SEAT RECLINING” in ACTIVE TEST.
Without CONSULT-II
GO TO 3.
OK or NG
OK
>> Reclining motor circuit is OK.
NG
>> GO TO 3.
Connector
Terminals
(Wire color)
Condition
Voltage (V)
(Approx)
(+)
(–)
B304
35 (W)
Ground
Sliding switch ON
(FR operation)
Battery voltage
Sliding switch OFF
0
42 (BR)
Sliding switch ON
(RR operation)
Battery voltage
Sliding switch OFF
0
PIIA4801E
Test item
Description
SEAT
RECLINING
The reclining motor is activated by receiving the drive signal.
PIIA0268E
AUTOMATIC DRIVE POSITIONER
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3.
CHECK RECLINING MOTOR CIRCUIT HARNESS CONTINUITY
1.
Turn ignition switch OFF.
2.
Disconnect driver seat control unit connector and reclining motor connector.
3.
Check continuity between driver seat control unit connector B304 terminals 36, 44 and reclining motor
connector B311 terminals 36, 44.
4.
Check continuity between driver seat control unit connector
B304 terminals 36, 44 and ground.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace harness between driver seat control
unit and reclining motor.
4.
CHECK DRIVER SEAT CONTROL UNIT OUTPUT SIGNAL
1.
Connect the driver seat control unit and reclining motor connector.
2.
Check voltage between driver seat control unit connector and
ground.
OK or NG
OK
>> Replace reclining motor.
NG
>> Replace driver seat control unit.
Check Front Lifting Motor Circuit
NIS001FI
1.
CHECK FRONT END SEAT LIFTING MECHANISM
Check the following.
●
Operation malfunction caused by lifter mechanism deformation or pinched harness or other foreign mate-
rials
●
Operation malfunction caused by foreign materials adhered to the lifter motor or lead screws
●
Operation malfunction and interference with other parts by installation
OK or NG
OK
>> GO TO 2.
NG
>> Repair the malfunctioning part and check again.
36 (G) – 36 (G)
: Continuity should exist.
44 (LG) – 44 (LG)
: Continuity should exist.
36 (G) – Ground
: Continuity should not exist.
44 (LG) – Ground
: Continuity should not exist.
PIIA4547E
Connector
Terminals
(Wire color)
Condition
Voltage (V)
(Approx)
(+)
(–)
B304
36 (G)
Ground
Reclining switch ON
(FR operation)
Battery voltage
Reclining switch OFF
0
44 (LG)
Reclining switch ON
(RR operation)
Battery voltage
Reclining switch OFF
0
PIIA4802E
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2.
CHECK FUNCTION
With CONSULT-II
Check operation with “SEAT LIFTER FR” in ACTIVE TEST.
Without CONSULT-II
GO TO 3.
OK or NG
OK
>> Front lifting motor circuit is OK.
NG
>> GO TO 3.
3.
CHECK FRONT LIFTING MOTOR CIRCUIT HARNESS CONTINUITY
1.
Turn ignition switch OFF.
2.
Disconnect driver seat control unit connector and front lifting motor connector.
3.
Check continuity between driver seat control unit connector B304 terminals 37, 45 and front lifting motor
connector B309 terminals 37, 45.
4.
Check continuity between driver seat control unit connector
B304 terminals 37, 45 and ground.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace harness between driver seat control
unit and front lifting motor.
Test item
Description
SEAT
LIFTER FR
The front end lifter motor is activated by receiving the drive sig-
nal.
PIIA0271E
37 (V) – 37 (V)
: Continuity should exist.
45 (O) – 45 (O)
: Continuity should exist.
37 (V) – Ground
: Continuity should not exist.
45 (O) – Ground
: Continuity should not exist.
PIIA4549E
AUTOMATIC DRIVE POSITIONER
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4.
CHECK DRIVER SEAT CONTROL UNIT OUTPUT SIGNAL
1.
Connect the driver seat control unit connector and front lifting motor connector.
2.
Check voltage between driver seat control unit connector and
ground.
OK or NG
OK
>> Replace front lifting motor.
NG
>> Replace driver seat control unit.
Check Rear Lifting Motor Circuit
NIS001FJ
1.
CHECK REAR END SEAT LIFTING MECHANISM
Check the following.
●
Operation malfunction caused by lifter mechanism deformation or pinched harness or other foreign mate-
rials
●
Operation malfunction caused by foreign materials adhered to the lifter motor or lead screws
●
Operation malfunction and interference with other parts by poor installation
OK or NG
OK
>> GO TO 2.
NG
>> Repair the malfunctioning part and check again.
2.
CHECK FUNCTION
With CONSULT-II
Check operation with “SEAT LIFTER RR” in ACTIVE TEST.
Without CONSULT-II
GO TO 3.
OK or NG
OK
>> Rear lifting motor circuit is OK.
NG
>> GO TO 3.
Connector
Terminals
(Wire color)
Condition
Voltage (V)
(Approx)
(+)
(–)
B304
37 (V)
Ground
Front lifting switch ON
(DOWN operation)
Battery voltage
Front lifting switch OFF
0
45 (O)
Front lifting switch ON
(UP operation)
Battery voltage
Front lifting switch OFF
0
PIIA4805E
Test item
Description
SEAT LIFTER
RR
The rear end lifter motor is activated by receiving the drive sig-
nal.
PIIA0274E
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3.
CHECK REAR LIFTING MOTOR CIRCUIT HARNESS CONTINUITY
1.
Turn ignition switch OFF.
2.
Disconnect driver seat control unit connector and rear lifting motor connector.
3.
Check continuity between driver seat control unit connector B304 terminals 38, 39 and rear lifting motor
connector B310 terminals 38, 39.
4.
Check continuity between driver seat control unit B304 terminals
38, 39 and ground.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace harness between driver seat control
unit and rear lifting motor.
4.
CHECK DRIVER SEAT CONTROL UNIT OUTPUT SIGNAL
1.
Connect the driver seat control unit and rear lifting motor.
2.
Check voltage between driver seat control unit connector and
ground.
OK or NG
OK
>> Replace rear lifting motor.
NG
>> Replace driver seat control unit.
Check Pedal Adjusting Motor Circuit
NIS001FK
1.
CHECK PEDAL ADJUSTING MECHANISM
Check the following.
●
Operation malfunction caused by pedal adjusting mechanism deformation or pinched harness or other
foreign materials
●
Operation malfunction and interference with other parts by poor installation
OK or NG
OK
>> GO TO 2.
NG
>> Repair the malfunctioning part and check again.
38 (L) – 38 (L)
: Continuity should exist.
39 (Y) – 39 (Y)
: Continuity should exist.
38 (L) – Ground
: Continuity should not exist.
39 (Y) – Ground
: Continuity should not exist.
PIIA4551E
Connector
Terminals
(Wire color)
Condition
Voltage (V)
(Approx)
(+)
(–)
B304
38 (L)
Ground
Rear lifting switch ON
(UP operation)
Battery voltage
Rear lifting switch OFF
0
39 (Y)
Rear lifting switch ON
(DOWN operation)
Battery voltage
Rear lifting switch OFF
0
PIIA4804E
AUTOMATIC DRIVE POSITIONER
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2.
CHECK FUNCTION
With CONSULT-II
Check operation with “PEDAL” in ACTIVE TEST.
Without CONSULT-II
GO TO 3.
OK or NG
OK
>> Pedal adjusting motor circuit is OK.
NG
>> GO TO 3.
3.
CHECK PEDAL ADJUSTING MOTOR CIRCUIT HARNESS CONTINUITY
1.
Turn ignition switch OFF.
2.
Disconnect automatic drive positioner control unit and pedal adjusting motor connector.
3.
Check continuity between automatic drive positioner control unit connector M20 terminals 37, 45 and
pedal adjusting motor connector E113 terminals 1, 2.
4.
Check continuity between automatic drive positioner control unit
connector M20 terminals 37, 45 and ground.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace harness between automatic drive
positioner control unit and pedal adjust motor.
Test item
Description
ADJ PEDAL MOTOR
The pedal adjust motor is activated by receiving the
drive signal.
PIIA4555E
37 (L/R) – 2 (L/R)
: Continuity should exist.
45 (L/Y) – 1 (L/Y)
: Continuity should exist.
37 (L/R) – Ground
: Continuity should not exist.
45 (L/Y) – Ground
: Continuity should not exist.
PIIB4130E
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4.
CHECK AUTOMATIC DRIVE POSITINER CONTROL UNIT OUTPUT SIGNAL
1.
Connect the automatic drive positioner control unit connector and pedal adjusting motor connector.
2.
Check voltage between automatic drive positioner control unit
connector and ground.
OK or NG
OK
>> Replace pedal adjusting motor.
NG
>> Replace automatic drive positioner control unit.
Check Mirror Motor LH Circuit
NIS001FL
1.
CHECK DOOR MIRROR LH MECHANISM
Check the following items.
Operation malfunction caused by a foreign object caught in door mirror face edge.
OK or NG
OK
>> GO TO 2.
NG
>> Repair the malfunctioning parts, and check the symptom again.
2.
CHECK FUNCTION
With CONSULT–II
Check the operation with “MIRROR MOTOR LH” in the ACTIVE
TEST.
Without CONSULT–II
GO TO 3.
OK or NG
OK
>> Mirror motor LH circuit is OK.
NG
>> GO TO 3.
Connec-
tor
Terminals
(Wire color)
Condition
Voltage (V)
(Approx)
(+)
(–)
M20
37 (L/R)
Ground
Pedal adjusting switch
ON
(FR operation)
Battery voltage
Pedal adjusting switch
OFF
0
45 (L/Y)
Pedal adjusting switch
ON
(RR operation)
Battery voltage
Pedal adjusting switch
OFF
0
PIIA4806E
Test item
Description
MIRROR MOTO
RLH
The LH mirror motor moves the mirror UP/DOWN and
LEFT/RIGHT by receiving the drive signal.
PIIA4784E
AUTOMATIC DRIVE POSITIONER
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3.
CHECK MIRROR MOTOR LH CIRCUIT HARNESS CONTINUITY
1.
Turn ignition switch OFF.
2.
Disconnect automatic drive positioner control unit and door mirror (driver side) connector.
3.
Check continuity between automatic drive positioner control unit connector M19 terminal 16, 31, 32 and
door mirror (driver side) connector D2 terminal 8, 9, 10.
4.
Check continuity between automatic drive positioner control unit
connector M19 terminal 16, 31, 32 and ground.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace harness between automatic drive positioner control unit and door mirror (driver
side).
4.
CHECK MIRROR MOTOR SIGNAL
1.
Connect automatic drive positioner control unit connector.
2.
Turn ignition switch ACC.
3.
Check voltage between door mirror (driver side) connector and ground.
OK or NG
OK
>> Replace door mirror motor (driver side).
NG
>> Check the condition of the harness and the connector.
Check Mirror Motor RH Circuit
NIS001FM
1.
CHECK DOOR MIRROR RH MECHANISM
Check the following items.
Operation malfunction caused by a foreign object caught in door mirror face edge.
OK or NG
OK
>> GO TO 2.
NG
>> Repair the malfunctioning parts, and check the symptom again.
16 (LG/R) – 10 (LG/R)
:Continuity should exist.
31 (R/L) – 8 (R/L)
:Continuity should exist.
32 (BR) – 9 (BR)
:Continuity should exist.
16 (LG/R) – Ground
:Continuity should not exist.
31 (R/L) – Ground
:Continuity should not exist.
32 (BR) – Ground
:Continuity should not exist.
PIIB3196E
Con-
nector
Terminals
(Wire color)
Condition
Voltage (V)
(Approx)
(+)
(–)
D2
8
(R/L)
Ground
When motor is
UP operation
1.5 - Battery voltage
Mirror motor LH OFF
0
9
(BR)
When motor is
LEFT operation
1.5 - Battery voltage
Mirror motor LH OFF
0
10
(LG/R)
When motor is
DOWN or RIGHT operation
1.5 - Battery voltage
Mirror motor LH OFF
0
PIIB3197E
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2.
CHECK FUNCTION
With CONSULT–II
Check the operation with “MIRROR MOTOR RH” in the ACTIVE
TEST.
Without CONSULT–II
GO TO 3.
OK or NG
OK
>> Mirror motor RH circuit is OK.
NG
>> GO TO 3.
3.
CHECK DOOR MIRROR RH CIRCUIT HARNESS CONTINUITY
1.
Turn ignition switch OFF.
2.
Disconnect automatic drive positioner control unit and door mirror (passenger side) connector.
3.
Check continuity between automatic drive positioner control unit connector M19 terminal 14, 15, 30 and
door mirror (passenger side) connector D32 terminal 8, 9, 10.
4.
Check continuity between automatic drive positioner control unit
connector M19 terminal 14, 15, 30 and ground.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace harness between automatic drive positioner control unit and door mirror (pas-
senger side).
Test item
Description
MIRROR MOTOR
RH
The RH mirror motor moves the mirror UP/DOWN and
LEFT/RIGHT by receiving the drive signal.
PIIA0202E
14 (GR/R) – 8 (GR/R)
:Continuity should exist.
15 (LG) – 9 (LG)
:Continuity should exist.
30 (SB) – 10 (SB)
:Continuity should exist.
14 (GR/R) – Ground
:Continuity should not exist.
15 (LG) – Ground
:Continuity should not exist.
30 (SB) – Ground
:Continuity should not exist.
PIIB3198E
AUTOMATIC DRIVE POSITIONER
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4.
CHECK MIRROR MOTOR SIGNAL
1.
Connect automatic drive positioner control unit connector.
2.
Turn ignition switch ACC.
3.
Check voltage between door mirror (passenger side) connector and ground.
OK or NG
OK
>> Replace door mirror motor (passenger side).
NG
>> Check the condition of the harness and the connector.
Connector
Terminals
(Wire color)
Condition
Voltage (V)
(Approx)
(+)
(–)
D32
8 (GR/R)
Ground
When motor is
UP operation
1.5 - Battery
voltage
Mirror motor RH OFF
0
9 (LG)
When motor is
LEFT operation
1.5 - Battery
voltage
Mirror motor RH OFF
0
10 (SB)
When motor is
DOWN or RIGHT operation
1.5 - Battery
voltage
Mirror motor RH OFF
0
PIIB3197E
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Check Sliding Sensor Circuit
NIS001FN
1.
CHECK FUNCTION
With CONSULT-II
Check operation with “SLIDE PULSE” on the DATA MONITOR to make sure the pulse changes.
Without CONSULT-II
1.
Turn ignition switch OFF.
2.
Check signal between driver seat control unit connector and
ground, with oscilloscope.
OK or NG
OK
>> Sliding sensor circuit is OK.
NG
>> GO TO 2.
2.
CHECK SLIDING SENSOR CIRCUIT HARNESS CONTINUITY
1.
Disconnect driver seat control unit connector and sliding motor connector.
2.
Check continuity between driver seat control unit connector
B303 terminals 24, 31 and sliding motor B307 terminals 24, 31A.
3.
Check continuity between driver seat control unit B303 terminals
24, 31 and ground.
OK or NG
OK
>> Replace sliding motor.
NG
>> Repair or replace harness between driver seat control unit and sliding motor.
Monitor item [OPERATION or UNIT]
Contents
SLIDE PULSE
—
The seat sliding position (pulse) judged
from the sliding sensor signal is displayed
PIIA4558E
Connector
Terminals
(Wire color)
Condition
Signal
(Reference value)
(+)
(–)
B303
24 (G/B)
Ground
Sliding
motor
operation
PIIA4556E
PIIA3277E
24 (G/B) – 24 (G/B)
: Continuity should exist.
31 (R/W) – 31A (R/W)
: Continuity should exist.
24 (G/B) – Ground
: Continuity should not exist.
31 (R/W) – Ground
: Continuity should not exist.
PIIA4557E
AUTOMATIC DRIVE POSITIONER
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Check Reclining Sensor Circuit
NIS001FO
1.
CHECK FUNCTION
With CONSULT-II
Check operation with “RECLINING PULSE” on the DATA MONITOR to make sure the pulse changes.
Without CONSULT-II
1.
Turn ignition switch OFF.
2.
Check signal between driver seat control unit connector and
ground, with oscilloscope.
OK or NG
OK
>> Reclining sensor circuit is OK.
NG
>> GO TO 2.
2.
CHECK RECLINING SENSOR CIRCUIT HARNESS CONTINUITY
1.
Disconnect driver seat control unit connector and reclining motor connector.
2.
Check continuity between driver seat control unit connector
B303 terminals 9, 31 and reclining motor connector B311 termi-
nals 9, 31.
3.
Check continuity between driver seat control unit connector
B303 terminals 9, 31 and ground.
OK or NG
OK
>> Replace reclining motor.
NG
>> Repair or replace harness between connectors driver seat control unit and reclining motor.
Monitor item [POERATION or UNIT]
Contents
RECLN PULSE
—
The seat reclining position (pulse) judged
from the reclining sensor is displayed
PIIA4558E
Connector
Terminals
(Wire color)
Condition
Signal
(Reference value)
(+)
(–)
B303
9 (L)
Ground
Reclining
motor
operation
PIIA4559E
PIIA3278E
9 (L) – 9 (L)
: Continuity should exist.
31 (R/W) – 31 (R/W)
: Continuity should exist.
9 (L) – Ground
: Continuity should not exist.
31 (R/W) – Ground
: Continuity should not exist.
PIIA4560E
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Check Front Lifting Sensor Circuit
NIS001FP
1.
CHECK FUNCTION
With CONSULT-II
Check operation with “LIFT FR PULSE” on the DATA MONITOR to make sure the pulse changes.
Without CONSULT-II
1.
Turn ignition switch OFF.
2.
Check signal between driver seat control unit connector and
ground, with oscilloscope.
OK or NG
OK
>> Front lifting sensor is OK.
NG
>> GO TO 2.
2.
CHECK FRONT LIFTINGS SENSOR CIRCUIT HARNESS CONTINUITY
1.
Disconnect driver seat control unit connector and front lifting motor connector.
2.
Check continuity between driver seat control unit connector B303 terminals 25, 31 and front lifting motor
connector B309 terminals 25, 31B.
3.
Check continuity between driver seat control unit connector
B303 terminals 25, 31 and ground.
OK or NG
OK
>> Replace front lifting motor.
NG
>> Repair or replace harness between driver seat control
unit and front lifting motor.
Monitor item [OPERATION or UNIT]
Contents
LIFT FR PULSE
—
The front lifting position (pulse) judged
from the front lifting sensor is displayed
PIIA4558E
Connector
Terminals
(Wire color)
Condition
Signal
(Reference value)
(+)
(–)
B303
25 (Y/B)
Ground
Front lift-
ing motor
operation
PIIA4561E
PIIA3278E
25 (Y/B) – 25 (Y/B)
: Continuity should exist.
31 (R/W) – 31B (R/W)
: Continuity should exist.
25 (Y/B) – Ground
: Continuity should not exist.
31 (R/W) – Ground
: Continuity should not exist.
PIIA4562E
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