2007 INFINITI M35 ignition

AUTO LIGHT SYSTEM
LT-127
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Revision: 2007 April2007 M35/M45
Preliminary CheckNKS003Q8
SETTING CHANGE FUNCTIONS

Sensitivity of auto light system can be adjusted using CONSULT-II. Refer to LT- 1 2 8 , "WORK SUPPORT" .
CHECK POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSE AND FUSIBLE LINK
Check for blown fuses and fusible link.
Refer to LT-118, "Wiring Diagram — AUTO/L —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse or fusible link is blown, be sure to eliminate cause of malfunction before installing new fuse
or fusible link. Refer to PG-3, "
POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check voltage between BCM harness connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
Unit Power source Fuse and fusible link No.
BCMBatteryF
21
Ignition switch ON or START position 1
Ignition switch ACC or ON position 6
IPDM E/R Battery71
72
74
76
78
86
Terminal Ignition switch position
(+)
(-) OFF ACC ON
BCM
connectorTerminal
M111
GroundApprox.
0VBattery
voltageBattery
voltage
38Approx.
0VApprox.
0VBattery
voltage
M242Battery
voltageBattery
voltageBattery
voltage
55Battery
voltageBattery
voltageBattery
voltage
PKIA5204E

AUTO LIGHT SYSTEM
LT-129
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Revision: 2007 April2007 M35/M45
DATA MONITOR
Operation Procedure
1. Touch “HEAD LAMP” on “SELECT TEST ITEM” screen.
2. Touch “DATA MONITOR” on “SELECT DIAG MODE” screen.
3. Touch either “ALL SIGNALS” or “SELECTION FROM MENU” on the “SELECT MONITOR ITEM” screen.
4. When “SELECTION FROM MENU” is selected, touch individual items to be monitored. When “ALL SIG-
NALS” is selected, all the items will be monitored.
5. Touch “START”.
6. Touch “RECORD” while monitoring, then the status of the monitored item can be recorded. To stop
recording, touch “STOP”.
Display Item List
NOTE:
This item is displayed, but cannot be monitored.ALL SIGNALS Monitors all the signals.
SELECTION FROM MENU Selects items and monitor them.
Monitor item Contents
IGN ON SW “ON/OFF” Displays “IGN position (ON)/OFF, ACC position (OFF)” judged from the ignition switch signal.
ACC ON SW “ON/OFF” Displays “ACC (ON)/OFF, Ignition OFF (OFF)” status judged from ignition switch signal.
KEY ON SW “ON/OFF”Displays “Intelligent Key inserted into key slot (ON)/Intelligent Key removed from key slot
(OFF)” status judged from the key switch signal.
TURN SIGNAL R “ON/OFF” Displays status (turn right: ON/others: OFF) as judged from lighting switch signal.
TURN SIGNAL L “ON/OFF” Displays status (turn left: ON/others: OFF) as judged from lighting switch signal.
HI BEAM SW “ON/OFF”Displays status (high beam switch: ON/others: OFF) of high beam switch judged from lighting
switch signal.
HEAD LAMP SW 1 “ON/OFF”Displays status (headlamp switch 1: ON/others: OFF) of headlamp switch 1 judged from light-
ing switch signal.
HEAD LAMP SW 2 “ON/OFF”Displays status (headlamp switch 2: ON/others: OFF) of headlamp switch 2 judged from light-
ing switch signal.
TAIL LAMP SW “ON/OFF”Displays status (lighting switch 1ST or 2ND position: ON/others: OFF) of lighting switch judged
from lighting switch signal.
AUTO LIGHT SW “ON/OFF”Displays status of the lighting switch as judged from the lighting switch signal. (AUTO position:
ON/other than AUTO position: OFF)
PASSING SW “ON/OFF”Displays status (flash-to-passing switch: ON/others: OFF) of flash-to-passing switch judged
from lighting switch signal.
FR FOG SW “ON/OFF”Displays status (front fog lamp switch: ON/others: OFF) of front fog lamp switch judged from
lighting switch signal.
DOOR SW - DR “ON/OFF”Displays status of the driver door as judged from the driver door switch signal. (door is open:
ON/door is closed: OFF)
DOOR SW - AS “ON/OFF”Displays status of the passenger door as judged from the passenger door switch signal. (door
is open: ON/door is closed: OFF)
DOOR SW - RR “ON/OFF”Displays status of the rear door as judged from the rear door switch (RH) signal. (door is open:
ON/door is closed: OFF)
DOOR SW - RL “ON/OFF”Displays status of the rear door as judged from the rear door switch (LH) signal. (door is open:
ON/door is closed: OFF)
BACK DOOR SW
NOTE “OFF” —
I - KEY LOCK “ON/OFF” Displays “locked (ON)/other (OFF)” status, determined from lock signal.
OPTICAL SENSOR “0 - 5V” Displays “outside brightness (close to 5 V when light/close to 0 V when dark)” judged from
optical sensor signal.
VEHICLE SPEED “km/h” Displays vehicle speed as judged from vehicle speed signal.

LT-130
AUTO LIGHT SYSTEM
Revision: 2007 April2007 M35/M45
ACTIVE TEST
Operation Procedure
1. Touch “HEAD LAMP” on “SELECT TEST ITEM” screen.
2. Touch “ACTIVE TEST” on “SELECT DIAG MODE” screen.
3. Touch item to be tested and check operation of the selected item.
4. During the operation check, touching “BACK” deactivates the operation.
Display Item List
NOTE:
This item is tested only for CANADA models.
Symptom ChartNKS003QA
Test item Description
TAIL LAMP Allows tail lamp relay to operate by switching ON-OFF.
FR FOG LAMP Allows front fog lamp relay to operate by switching ON-OFF.
DAYTIME RUNNING LIGHT
NOTEAllows daytime light relay to operate by switching ON-OFF.
HEAD LAMP (HI, LO) Allows headlamp relay to operate by switching ON-OFF.
Phenomenon Malfunction system and reference

Parking lamps and headlamps will not illuminate when outside
of the vehicle becomes dark. (Lighting switch 1ST position and
2ND position operate normally.)

Parking lamps and headlamp will not go out when outside of the
vehicle becomes light. (Lighting switch 1ST position and 2ND
position operate normally.)

Headlamps go out when outside of the vehicle becomes light,
but parking lamps stay on.

Refer to LT-128, "WORK SUPPORT" .

Refer to LT-131, "Lighting Switch Inspection" .

Refer to LT-131, "Optical Sensor System Inspection" .
If above systems are normal, replace BCM.
Parking lamps illuminate when outside of the vehicle becomes
dark, but headlamps stay off. (Lighting switch 1ST position and
2ND position operate normally.)

Refer to LT-128, "WORK SUPPORT" .

Refer to LT-131, "Optical Sensor System Inspection" .
If above systems are normal, replace BCM.
With the ignition key in ACC position, headlamps, clearance
lamps, tail lamps, etc. will not go out when the driver's door is
opened.

Refer toBL-94, "Check Door Switch" .
If above system is normal, replace BCM.
Auto light adjustment system will not operate. (Lighting switch
AUTO, 1ST position and 2ND position operate normally.)

Refer to LT-131, "Optical Sensor System Inspection" .
If above system is normal, replace BCM.
Auto light adjustment system of combination meter will not oper-
ate.

CAN communication line inspection between BCM and combi-
nation meter: Refer to BCS-13, "
CAN Communication Inspec-
tion Using CONSULT-II (Self-Diagnosis)" .

AUTO LIGHT SYSTEM
LT-131
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Revision: 2007 April2007 M35/M45
Lighting Switch InspectionNKS003QB
1. CHECK LIGHTING SWITCH INPUT SIGNAL
With CONSULT-II
1. Select “BCM” on CONSULT-II, and select “HEAD LAMP” on
“SELECT TEST ITEM” screen.
2. Select “DATA MONITOR” on “SELECT DIAG MODE” screen,
and make sure “AUTO LIGHT SW” turns ON–OFF linked with
operation of lighting switch.
Without CONSULT-II
Refer to LT- 2 3 9 , "
Combination Switch Inspection" .
OK or NG
OK >> INSPECTION END
NG >> Replace combination switch (lighting switch). Refer to LT- 2 3 9 , "
Combination Switch Inspection" .
Optical Sensor System InspectionNKS003QC
1. CHECK OPTICAL SENSOR INPUT SIGNAL
With CONSULT-II
1. Select “BCM” on CONSULT-II, and select “HEAD LAMP” on
“SELECT TEST ITEM” screen.
2. Select “DATA MONITOR” on “SELECT DIAG MODE” screen.
On “OPTICAL SENSOR”, check difference in the voltage when
optical sensor is illuminated and not illuminated.
CAUTION:
Optical sensor must be securely subjected to work lamp light. If the optical sensor is insufficiently
illuminated, the measured value may not satisfy the standard.
Without CONSULT-II
1. Turn ignition switch ON.
2. Check voltage between BCM harness connector and ground.
CAUTION:
Optical sensor must be securely subjected to work lamp light. If the optical sensor is insufficiently
illuminated, the measured value may not satisfy the standard.
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.When lighting switch is AUTO
position: AUTO LIGHT SW ON
PKIA7595E
Illuminated
OPTICAL SENSOR : 3.1 V or more
Not illuminated
OPTICAL SENSOR : 0.6 V or less
Terminal
ConditionVoltage
(Approx.) (+)
(-)
BCM
connectorTerminal
M1 14 Ground Illuminated
Optical sensor3.1 V or more
Not illuminated
Optical sensor0.6 V or less
PKIA7596E
PKIB6163E

LT-132
AUTO LIGHT SYSTEM
Revision: 2007 April2007 M35/M45
2. CHECK OPTICAL SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector and optical sensor connector.
3. Check continuity (open circuit) between BCM harness connector
and optical sensor harness connector.
4. Check continuity (short circuit) between BCM harness connector
and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK OPTICAL SENSOR SIGNAL CIRCUIT
1. Check continuity (open circuit) between BCM harness connector
and optical sensor harness connector.
2. Check continuity between (short circuit) BCM harness connector
and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4. CHECK OPTICAL SENSOR GROUND CIRCUIT
1. Check continuity (open circuit) between BCM harness connector
and optical sensor harness connector.
2. Check continuity (short circuit) between BCM harness connector
and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connector.
BCM Optical sensor
Continuity
Connector Terminal Connector Terminal
M1 17 M48 1 Yes
BCM connector Terminal
GroundContinuity
M1 17 No
PKIA6257E
BCM Optical sensor
Continuity
Connector Terminal Connector Terminal
M1 14 M48 2 Yes
BCM connector Terminal
GroundContinuity
M1 14 No
PKIA6258E
BCM Optical sensor
Continuity
Connector Terminal Connector Terminal
M1 18 M48 3 Yes
BCM connector Terminal
GroundContinuity
M1 18 No
PKIA6259E

AUTO LIGHT SYSTEM
LT-133
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Revision: 2007 April2007 M35/M45
5. CHECK OPTICAL SENSOR VOLTAGE
1. Connect BCM connector.
2. Turn ignition switch ON.
3. Check voltage between BCM harness connector and ground.
OK or NG
OK >> Replace optical sensor. Refer to LT- 1 3 3 , "Removal and
Installation for Optical Sensor" .
NG >> Replace BCM. Refer to BCS-15, "
Removal and Installation of BCM" .
Removal and Installation for Optical SensorNKS003QD
REMOVAL
1. Disengage the tab (A) and disconnect connector.
2. Remove optical sensor (1).
INSTALLATION
Installation is the reverse order of removal.
Terminal
Voltage
(Approx.) (+)
(-)
BCM connector Terminal
M1 17 Ground 5.0 V
SKIA5894E
SKIB4159E

LT-136
ACTIVE AFS
Revision: 2007 April2007 M35/M45
HEADLAMP AUTO AIMING
Headlamp auto aiming control automatically corrects vertical deviation of light axis that is brought by the
change of vehicle height with changing number of passenger and laden weight, and relieves dazzle to oncom-
ing vehicles.
AFS control unit determines the current vehicle conditions by each received signals, and sends commands to
the low beam headlamps to auto aiming. With the headlamps (HIGH/LOW) illuminated and engine running,
the low beam headlamps are operative by AFS control unit commands.
The height sensor is located on the left side of the rear suspension member and detects rear vehicle height
change by sensing the displacement of the rear suspension arm. And transmits a height sensor signal to the
AFS control unit.
With reference to the rear vehicle height under the empty condition, light axis of low beam with low rear vehi-
cle height is relatively higher than that with the empty condition. AFS control unit switches drive signal corrects
height of low beam axis to maintain height of light axis with empty condition.
Light axis of low beam with high rear vehicle height is relatively lower than that with empty condition. Light axis
of low beam with empty condition is set as upper limit of headlamp auto aiming control operation. Control to
correct deviation is not performed when light axis of low beam gets relatively higher than that with empty con-
dition. Timing of control is switched in accordance with driving conditions.

Headlamp auto aiming operation
*1: Included high beam illuminated
*2: Control timing of drive signal is switched by vehicle speed and accelerating/decelerating vehicle.
*3: Control is performed without regard to the condition of AFS switch. Headlamp auto aiming control function cannot be cancelled.
OUTLINE
Power is supplied
When the ignition switch is ON or START position, power is supplied

through 10A fuse [No.12, located in fuse block (J/B)]

to AFS control unit terminal 1

to front combination lamp LH and RH terminal 13

to AFS switch terminal 1

to unified meter and A/C amp. terminal 53.
Ground is supplied

to AFS control unit terminal 25

through grounds M16 and M70,

to front combination lamp LH and RH terminal 11

through grounds E22 and E43.
SKIB4707E
Operating range With 18-inch wheel (Reference value) With 19-inch wheel (Reference value) Vehicle height
A 0 mm (Standard position) 0 mm (Standard position) Unloaded vehicle position
B Approx. 200 mm (7.9 in) Approx.180 mm (7.1 in) Low
Low beam status Vehicle speed Engine speed AFS switch
Illuminated*
1Control switch by driving conditions*2While engine running
Irrespective*3

ACTIVE AFS
LT-137
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Revision: 2007 April2007 M35/M45
AFS OPERATION
When The Steering Wheel Is Turned To The Left
Swivel motor driving signal (1-phase) is transmitted when the steer-
ing wheel is turned to left approximately more than 10* degrees
(predetermined), with vehicle speed at approximately 25 km/h (15.5
MPH) or more, headlamps (HIGH/LOW) illuminated, AFS switch ON
and the engine running and the A/T select lever in any position
except range P or R.
* : Slightly different from the case when it is turned to the right.
Swivel motor driving signal (1-phase) is sent

to front combination lamp LH terminal 17

through AFS control unit terminal 15,

to AFS control unit terminal 38

through front combination lamp LH terminal 21.
And swivel motor driving signal (2-phase) is sent:

to front combination lamp LH terminal 16

through AFS control unit terminal 17,

to AFS control unit terminal 36

through front combination lamp LH terminal 20.
Swivel position sensor detects swivel angle during ignition switch ON, and transmits swivel position sensor
signals to the AFS control unit:
When ignition switch is turn to ON position, power is supplied

to front combination lamp LH terminal 15

through AFS control unit terminal 24.
When ignition switch is turn to ON position, swivel position sensor signal input is supplied

to AFS control unit terminal 29

through front combination lamp LH terminal 14.
Ground is supplied

to front combination lamp LH terminal 19

through AFS control unit terminal 27.
The low beam headlamp LH starts to swivel to the left.
The swivel motor driving signals are blocked and the swivel motion stops when the steering angle reaches
approximately more than 80 degrees (predetermined). The low beam headlamp will not swivel any further no
matter how further left. As the steering wheel is turned back to the right, the swivel motor driving signals (both
1-phase and 2-phase) will be reversed, causing low beam headlamp LH to start swiveling to the right. When
steering angle becomes smaller than predetermined value, the low beam headlamp is set in the straight-
ahead position, swivel motor driving signals are blocked and low beam headlamps stop swiveling.
When The Steering Wheel Is Turned To The Right
Swivel motor driving signal (1-phase) is transmitted when the steer-
ing wheel is turned to right approximately more than 10* degrees
(predetermined), with headlamps (HIGH/LOW) illuminated, AFS
switch ON, the engine running and the A/T select lever in any posi-
tion except range P or R.
* : Slightly different from the case when it is turned to the left.
Swivel motor driving signal (1-phase) is sent

to front combination lamp RH terminal 16

through AFS control unit terminal 34,

to AFS control unit terminal 11

through front combination lamp RH terminal 20.
And swivel motor driving signal (2-phase) is sent

to front combination lamp RH terminal 17

through AFS control unit terminal 32,

to AFS control unit terminal 13
SKIB4705E
SKIB4706E