2006 INFINITI FX35 lock

BACK DOOR AUTO CLOSURE SYSTEM BL-165
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Revision: 2006 December 2006 FX35/FX45
OPEN OPERATION

When passenger side door unlock and back door shuts, back door opener switch is pushed.

Back door closure control unit receives the signal, closure motor is operated in an open direction, and
back door opens.

Closure motor is operated in the close direction and stops at a neutral position when the following condi-
tions detected after turning on open switch.
–When back door is in half-open state, and
–5 seconds past without opening back door.
PIIA6187E

BL-168
BACK DOOR AUTO CLOSURE SYSTEM
Revision: 2006 December 2006 FX35/FX45
Terminals and Reference Value for Back Door Closure Control UnitNIS001OP
*, (): Models with Intelligent Key Termi-
nal Wire
color Item Signal
Input/
output Condition
Voltage (V)
(Approx.)
1 R Power source (Fuse) Input — Battery voltage
2 PU Closure motor (open) signal Output Fully close → fully open
3 G Closure motor (close) signal Output Fully open → fully close
4 B Ground — — 0
5 W
(B) Ground* — — 0*
Unlock sensor signal
(passenger side) Input Passenger side door lock is
locked 5
Passenger side door lock is
unlocked 0
6 Y
(LG) Back door opener switch
signal Input Back door opener switch is ON 0
Other than above 5
7 OR Half-latch switch signal Input Fully open → fully close
8 L Close switch signal Input Fully open → fully close
9 P Open switch signal Input Fully open → fully close
SIIA1480J
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SIIA1479J
SIIA1478J
SIIA1481J

BACK DOOR AUTO CLOSURE SYSTEM BL-169
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Revision: 2006 December 2006 FX35/FX45
Work FlowNIS001OQ
1. Check the symptom and customer's requests.
2. Understand the outline of system. Refer to BL-164, "
System Description" .
3. Perform the preliminary check, Refer to BL-169, "
Preliminary Check"
4. According to the trouble diagnosis chart, repair or replace the cause of the malfunction. Refer to BL-169,
"Trouble Diagnosis Chart by Symptom" .
5. Does back door auto closure system operate normally? If Yes, GO TO 6, If No, GO TO 4.
6. INSPECTION END
Preliminary CheckNIS001OR
Remove the fuse No.18 for the back door closure with the back door closure inactive.
Check that the back door can be open / close normally.
CAUTION:
It is judged it is abnormal, discontinues closure operation, and drive lever returns to a neutral position
if not becoming full-latch within about three seconds after half-latch.
When this operation is done continuously three times, both back door closure and back door opener
switch are not operated because the function of back door closure is stopped.
Thing to reset power supply by pulling out and opening fuse in that case.
Trouble Diagnosis Chart by SymptomNIS001OS
Symptom Diagnostic procedure and repair order Refer to page
Back door closure does not operate. 1. Check back door closure motor power supply and
ground circuit BL-170
2. Check half-latch switch
BL-170
3. Check close switchBL-172
4. Check open switchBL-173
5. Check closure motorBL-179
6. Replace back door closure control unit.BL-179
Back door does not open (with Intelligent Key system). 1. Check Intelligent Key system
BL-1152. Check back door opener switchBL-174
Back door does not open 1. Check back door opener switch
BL-1762. Check unlock sensorBL-178
3. Replace back door closure control unit.BL-179
Back door does not enter fully closed states through
back door closure operates. 1. Back door fitting adjustment.
BL-158
2. Replace back door lock assembly.BL-162

BL-170
BACK DOOR AUTO CLOSURE SYSTEM
Revision: 2006 December 2006 FX35/FX45
Check Back Door Closure Control Unit Power Supply and Ground CircuitNIS001OT
1. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Check voltage between back door closure control unit connector D106 terminal 1 and ground.
OK or NG
OK >> GO TO 2.
NG >> Check the following.

15A fuse [No.18, located in fuse block (J/B)]

Harness for open or short between back door closure
control unit and fuse.
2. CHECK GROUND CIRCUIT
1. Disconnect back door closure control unit connector.
2. Check continuity between back door closure control unit con- nector D106 terminal 4 and ground.
OK or NG
OK >> Power supply and ground circuit are OK.
NG >> Repair or replace harness.
Check Half-Latch SwitchNIS001OU
1. CHECK HALF-LATCH SWITCH SIGNAL
1. Turn ignition switch OFF.
2. Check the signal between back door closure control unit connector and ground with oscilloscope.
OK or NG
OK >> Half-latch switch is OK.
NG >> GO TO 2. 1 (R) – Ground : Battery voltage
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4 (B) – Ground : Continuity should exist.
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Con-
nector Terminals (Wire color)
Back door
condition Signal
(Reference value)
(+) (-)
D106 7 (OR) Ground Fully open
→
fully closed
PIIA6168E
SIIA1479J

BACK DOOR AUTO CLOSURE SYSTEM BL-171
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Revision: 2006 December 2006 FX35/FX45
2. CHECK HARNESS CONTINUITY
1. Disconnect back door closure control unit and back door closure motor connector.
2. Check continuity between back door closure control unit con- nector D106 terminal 7 and back door closure motor connector
D109 terminal 6.
3. Check continuity between back door closure control unit con- nector D106 terminal 7 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK GROUND CIRCUIT
Check continuity between back door closure motor connector D109
terminal 8 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
4. CHECK BACK DOOR CLOSURE CONTROL UNIT OUTPUT SIGNAL
1. Connect back door closure control unit connector.
2. Check voltage between back door closure control unit connector D106 terminal 7 and ground.
OK or NG
OK >> Replace back door lock assembly.
NG >> Replace back door closure control unit. 7 (OR) – 6 (OR) : Continuity should exist.
7 (OR) – Ground : Continuity should not exist.
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8 (B) – Ground : Continuity should exist.
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Back door is closed
7 (OR) – Ground : Battery voltage
PIIA6172E

BACK DOOR AUTO CLOSURE SYSTEM BL-173
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Revision: 2006 December 2006 FX35/FX45
4. CHECK BACK DOOR CLOSURE CONTROL UNIT OUTPUT SIGNAL
1. Connect back door closure control unit connector.
2. Check voltage between back door closure control unit connector D106 terminal 8 and ground.
OK or NG
OK >> Replace back door lock assembly.
NG >> Replace back door closure control unit.
Check Open SwitchNIS001OW
1. CHECK OPEN SWITCH SIGNAL
1. Turn ignition switch OFF.
2. Check the signal between back door closure control unit connector and ground with oscilloscope.
OK or NG
OK >> Open switch is OK.
NG >> GO TO 2.
2. CHECK HARNESS CONTINUITY
1. Disconnect back door closure control unit and back door closure motor connector.
2. Check continuity between back door closure control unit con- nector D106 terminal 9 and back door closure motor connector
D109 terminal 4.
3. Check continuity between back door closure control unit con- nector D106 terminal 9 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness. Back door is closed
8 (L) – Ground : Battery voltage
PIIA6173E
Con-
nector Terminals (Wire color)
Back door
condition Signal
(Reference value)
(+) (-)
D106 9 (P) Ground Fully open
→
fully closed
PIIA6175E
SIIA1481J
9 (P) – 4 (P) : Continuity should exist.
9 (P) – Ground : Continuity should not exist.
PIIA6176E

BL-174
BACK DOOR AUTO CLOSURE SYSTEM
Revision: 2006 December 2006 FX35/FX45
3. CHECK GROUND CIRCUIT
Check continuity between back door closure motor connector D109
terminal 8 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
4. CHECK BACK DOOR CLOSURE CONTROL UNIT OUTPUT SIGNAL
1. Connect back door closure control unit connector.
2. Check voltage between back door closure control unit connector D106 terminal 9 and ground.
OK or NG
OK >> Replace back door lock assembly.
NG >> Replace back door closure control unit.
Check Back Door Opener Switch (With Intelligent Key)NIS001OX
1. CHECK BACK DOOR OPENER SWITCH SIGNAL
1. Turn ignition switch OFF.
2. Check voltage between back door closure control unit connector and ground.
OK or NG
OK >> Back door opener switch is OK.
NG >> GO TO 2. 8 (B) – Ground : Continuity should exist.
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Back door is closed
9 (P) – Ground : Battery voltage
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Connector Terminals (Wire color)
Condition Voltage (V)
(Approx.)
(+) (-)
D106 6 (LG) Ground Back door opener switch
: ON 0
Back door opener switch
: OFF 5
PIIA6178E

BL-178
BACK DOOR AUTO CLOSURE SYSTEM
Revision: 2006 December 2006 FX35/FX45
Check Unlock Sensor (Without Intelligent Key)NIS001OZ
1. CHECK UNLOCK SENSOR SIGNAL
1. Turn ignition switch OFF.
2. Check voltage between back door closure control unit connector and ground.
OK or NG
OK >> Unlock sensor is OK.
NG >> GO TO 2.
2. CHECK HARNESS CONTINUITY
1. Disconnect back door closure control unit and front door lock assembly (passenger side) connector.
2. Check continuity between back door closure control unit con- nector D106 terminal 5 and front door lock assembly (passenger
side) connector D40 terminal 5.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness between back door closure
control unit and front door lock assembly (passenger
side).
3. CHECK GROUND CIRCUIT
Check continuity between front door lock assembly (passenger side)
connector D40 terminal 4 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
Connector Terminals (Wire color)
Condition Voltage (V)
(Approx.)
(+) (-)
D106 5 (W) Ground Passenger side door lock is
locked 5
Passenger side door lock is
unlocked 0
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5 (W) – 5 (W) : Continuity should exist.
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4 (B) – Ground : Continuity should exist.
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