Infiniti Q45. Manual — part 671
HEADLAMP (FOR USA)
LT-21
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ACTIVE TEST
Operation Procedure
1.
Touch “AUTO LIGHT SYSTEM” on “SELECT TEST ITEM” screen.
2.
Touch “ACTIVE TEST” on “SELECT DIAG MODE” screen.
3.
Touch item to be tested and check operation of selected item.
4.
Touch “OFF” while testing and the operation will be stopped.
Active Test Item
On Board Diagnosis
NKS0017D
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BCM can check communication diagnosis, switch monitor, and central locking system self diagnosis using
on board diagnosis.
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Map lamps and step lamps (all seats) act as the indicators for on board diagnosis.
DIAGNOSIS ITEM
SWITCH MONITOR
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Performs diagnosis on the switch system to each control unit.
How to Perform Switch Monitor
Test item
Display on
CONSULT–II screen
Description
Headlamp relay output
HEAD LAMP RELAY
Headlamp relay can be operated by any on-off operation of the headlamp.
Tail lamp relay output
TAIL LAMP RELAY
Tail lamp relay can be operated by any on-off operation of the tail lamp.
Auto light adjustment output
ILL DIM SIGNAL
Night time dimming signal can be operated by any on-off operation.
Diagnosis item
Description
Switch monitor
Checks for malfunction in switch systems that input to BCM and each LCU.
PKIA7882E
LT-22
HEADLAMP (FOR USA)
Description
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Detects the status change (switch ON/OFF operation) of switch to be checked, and turns ON/OFF indica-
tor lamps (the map lamp and step lamp). Also sounds the buzzer for 0.5 seconds.
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If a malfunction is detected, no indicator lamp and buzzer react.
Switch Monitor Item
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The status of the switch (except the ignition switch, interior lamp illumination switch, and map lamp switch)
as input to each control unit can be monitored.
Switch Monitor Cancellation
Either or both the following conditions are satisfied, the communication diagnosis is cancelled.
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Turn ignition switch OFF.
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Drive vehicle more at speed higher than 7 km/h (4 MPH).
Symptom Chart
NKS0017E
HEADLAMP SYSTEM
PIIA0177E
Control unit
Item
BCM
Lighting switch (AUTO, 1ST position)
Driver door switch
Symptom
Repair Procedure
Headlamp (Both side) do not operate.
1. Check 10A fuse [No. 6, located in fuse block (J/B) No. 1].
Verify battery positive voltage is present at terminal 7 of headlamp battery saver control
unit.
2. Check lighting switch. Refer to
LT-28, "Switch Circuit Inspection"
.
3. Check headlamp battery saver control unit. Refer to
LT-15, "Terminals and Reference
Values for Headlamp Battery Saver Control Unit"
Low beam headlamps do not operate, but
high beam headlamps operate.
1. Check headlamp relay-1.
2. Check harness between headlamp relay-1 and headlamp battery saver control unit.
3. Check headlamp battery saver control unit. Refer to
LT-15, "Terminals and Reference
Values for Headlamp Battery Saver Control Unit"
High beam headlamps do not operate,
but low beam headlamps operate.
1. Check 15A fuse (No. 73, located in fuse, fusible link and relay box). Verify battery posi-
tive voltage is present at terminals 2 and 5 of headlamp relay-2.
2. Check headlamp relay-2.
3. Check harness between headlamp relay-2 and battery saver control unit.
4. Check lighting switch. Refer to
LT-28, "Switch Circuit Inspection"
.
5. Check headlamp battery saver control unit. Refer to
LT-15, "Terminals and Reference
HEADLAMP (FOR USA)
LT-23
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RH low beam headlamp does not oper-
ate, but LH low beam headlamp oper-
ates.
1. Check 20A fuse [No. 55, located in fuse, fusible link and relay block (J/B)]. Verify battery
positive voltage is present at terminal 7 of headlamp relay-1.
2. Check headlamp relay-1.
3. Check harness between headlamp relay-1 terminal 6 and front combination lamp RH for
open circuit.
4. Check continuity between front combination lamp RH terminal 8 and ground.
5. Replace xenon bulb with other side bulb or new one. (If headlamps illuminate correctly,
replace bulb.)
6. Replace HID control unit with other side control unit or new one. (If headlamps illuminate
correctly, replace HID control unit.)
LH low beam headlamp does not oper-
ate, but RH low beam headlamp oper-
ates.
1. Check 20A fuse [No. 57, located in fuse, fusible link and relay block (J/B)]. Verify battery
positive voltage is present at terminal 3 of headlamp relay-1.
2. Check headlamp relay-1.
3. Check harness between headlamp relay-1 terminal 5 and front combination lamp LH for
open circuit.
4. Check continuity between front combination lamp LH terminal 8 and ground.
5. Replace xenon bulb with other side bulb or new one. (If headlamps illuminate correctly,
replace bulb.)
6. Replace HID control unit with other side control unit or new one. (If headlamps illuminate
correctly, replace HID control unit.)
RH high beam headlamp does not oper-
ate, but LH high beam headlamp oper-
ates.
1. Check bulb.
2. Check harness between headlamp relay-2 terminal 3 and front combination lamp RH
terminal 13.
3. Check lighting switch. Refer to
LT-28, "Switch Circuit Inspection"
4. Check harness between front combination lamp RH terminal 14 and lighting switch.
5. Check lighting switch ground circuit.
LH high beam headlamp does not oper-
ate, but RH high beam headlamp oper-
ates.
1. Check bulb.
2. Check harness between headlamp relay-2 terminal 3 and headlamp LH terminal 13.
3. Check lighting switch. Refer to
LT-28, "Switch Circuit Inspection"
4. Check harness between front combination lamp LH terminal 14 and lighting switch.
5. Check lighting switch ground circuit.
High beam indicator does not work.
1. Check bulb in combination meter.
2. Check harness between headlamp relay-2 terminal 3 and lighting switch for open circuit.
Battery saver control does not operate
properly.
1. Verify 12 positive voltage from BCM is present at terminal 10 of headlamp battery saver
control unit:
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Within 45 seconds after ignition switch turned off.
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Front door is opened or more than 45 seconds after ignition switch is turn off.
2. Check the following.
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Harness between BCM and LH or RH front door switch for open or short circuit.
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LH or RH front door switch ground circuit.
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LH or RH front door switch.
3. Check the following.
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Harness between headlamp battery saver control unit terminals 5 or 13 and lighting
switch terminal 11 for open or short circuit.
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Harness between lighting switch terminal 5 and ground.
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LT-28, "Switch Circuit Inspection"
.
4. Check headlamp battery saver control unit. Refer to
LT-15, "Terminals and Reference
Values for Headlamp Battery Saver Control Unit"
5. Check BCM. Refer to
LT-16, "Terminals and Reference Values for BCM"
Symptom
Repair Procedure
LT-24
HEADLAMP (FOR USA)
AUTO LIGHT SYSTEM
Symptom
Malfunctioning system and reference
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Parking lamps and headlamps do not illuminate when outside
brightness becomes low. (Lighting switch 1st position and 2nd
position operate normally.)
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Parking lamps and headlamp do not go out when outside
brightness becomes high. (Lighting switch 1st position and 2nd
position operate normally.)
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Lighting switch (AUTO) system. Refer to
.
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Optical sensor system. Refer to
.
If above systems are normal, replace the BCM.
Parking lamps illuminate when outside brightness becomes low,
but headlamp stay off. (Lighting switch 1st position and 2nd posi-
tion operate normally.)
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Headlamp relay system. Refer to
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Optical sensor system. Refer to
.
If above systems are normal, replace the BCM.
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Headlamps illuminate when outside brightness becomes low,
but Parking lamps stay off. (Lighting switch 1st position and
2nd position operate normally.)
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Headlamps go out when outside brightness becomes high, but
Parking lamps stay on.
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Tail lamp relay system. Refer to
If above system is normal, replace the BCM.
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