Infiniti F50. Manual - part 639

 

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Infiniti F50. Manual - part 639

 

 

HEADLAMP (FOR USA)

LT-23

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6.

Select the desired part to be diagnosed on the “SELECT TEST ITEM” screen.

WORK SUPPORT
Operation Procedure

1.

Touch “AUTO LIGHT SYSTEM” on the “SELECT TEST ITEM” screen.

2.

Touch “WORK SUPPORT” on the “SELECT DIAG MODE” screen.

3.

Touch “AUTO LIGHT SENS ADJ” on the “SELECT WORK ITEM” screen.

4.

Touch “START”.

5.

Touch “NORMAL”·“MODE 1 - 3” of which setting is to be changed.

6.

Touch “CHANGE SETT”.

7.

The setting will be changed and “CURRENT SETTING STATUS” will be displayed.

8.

Touch “END”.

Display Item List

Refer to 

LT-20, "SETTING CHANGE FUNCTION FOR AUTO LIGHT SYSTEM"

 .

DATA MONITOR
Operation Procedure

1.

Touch “AUTO LIGHT SYSTEM” on the “SELECT TEST ITEM” screen.

2.

Touch “DATA MONITOR” on the “SELECT DIAG MODE” screen.

3.

Touch “ALL SIGNALS” or “SELECTION FROM MENU” on the “SELECT MONITOR ITEM” screen.

4.

Touch “START”.

5.

When selected “SELECTION FROM MENU”, touch items to be monitored. When “ALL SIGNALS” is
selected all items will be monitored.

6.

Touch “RECORD” while monitoring and status of the item being monitored can be recorded. To stop
recording, touch “STOP”.

Data Monitor Item 

ACTIVE TEST
Operation Procedure

1.

Touch “AUTO LIGHT SYSTEM” on the “SELECT TEST ITEM” screen.

2.

Touch “ACTIVE TEST” on the “SELECT DIAG MODE” screen.

3.

Touch item to be tested and check operation of the selected item.

4.

Touch “STOP” while testing and the operation will be stopped.

Active Test Item 

MAIN SIGNALS

Monitors the main items.

SELECTION FROM MENU

Selects and monitors the items.

Monitored item

[“OPERATION OR UNIT”]

Description

IGN ON SW

[ON/OFF]

Displays status of the ignition switch as judged from the ignition switch signal. 
(Key is in ON position: ON/Key is in ACC or OFF position: OFF)

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)

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)

HD/LMP 1ST SW

[ON/OFF]

Displays status of the lighting switch as judged from the lighting switch signal. 
(OFF or AUTO position: OFF/Other than OFF and AUTO position: ON)

OPTICAL SEN

[ON/OFF]

Displays “Illumination outside of the vehicle (close to 5V when light/close to 0V when dark)” 
as judged from the optical sensor signal.

Test items

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.

LT-24

HEADLAMP (FOR USA)

On Board Diagnosis

EKS001HB

BCM can check malfunction in each local control unit (LCU), switches, loads and communications using the
self-diagnosis function.

DIAGNOSIS ITEM

SWITCH MONITOR

Perform the diagnosis on the switch system to each control unit.

How to Perform Switch Monitor

Description

In this mode, when BCM detects the input signal from a switch in IVMS as shown below, the detection is
indicated by the map lamp and front step lamps with buzzer.

Switch Monitor Item

The status of the switch (except the ignition switch, interior lamp ill switch, and map lamp switch) as input
to each control unit can be monitored.

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.

SIIA0411E

PIIA0177E

Control unit

Item

BCM

Lighting switch (AUTO, 1ST position)

Driver door switch

HEADLAMP (FOR USA)

LT-25

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Cancel of Switch Monitor

If the following conditions are satisfied, the communication diagnosis is cancelled.

Turn ignition switch OFF.

Drive the vehicle more than 7 km/h (4 MPH).

Symptom Chart

EKS001HC

HEADLAMP SYSTEM

Symptom

Repair Procedure

Neither headlamp operates.

1. Check 10A fuse [No. 6, located in fuse block (J/B) No. 1].

Verify battery positive voltage is present at terminal 7 of head-
lamp battery saver control unit.

2. Check lighting switch. Refer to 

LT-67, "Switch Circuit Inspec-

tion"

 .

3. Check headlamp battery saver control unit. Refer to 

LT-17, "Ter-

minals and Reference Value for Battery Saver Control Unit"

 .

Headlamp (low beam) does not operate, but headlamp (high 
beam) does operate.

1. Check 20A fuse [No. 57, located in fuse, fusible link and relay 

block (J/B)]. Verify battery positive voltage is present at termi-
nals 3 of headlamp relay-1.

2. Check headlamp relay-1.

3. Check harness between headlamp relay-1 and headlamp bat-

tery saver control unit.

4. Check headlamp battery saver control unit. Refer to 

LT-17, "Ter-

minals and Reference Value for Battery Saver Control Unit"

 .

Headlamp (high beam) does not operate, but headlamp (low  
beam) does operate.

1. Check 15A fuse (No. 73, located in fuse, fusible link and relay 

box). Verify battery positive 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 headlamp battery saver control unit. Refer to 

LT-17, "Ter-

minals and Reference Value for Battery Saver Control Unit"

 .

RH low beam does not operate, but LH low beam does operate.

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 RH 

headlamp for open circuit.

4. Check RH low beam ground circuit.

5. Replace the xenon bulb with other side bulb or new one. (If 

eclampsia illuminate correctly, replace the bulb.)

6. Replace the HID control unit with other side control unit or new 

one. (If eclampsia illuminate correctly, replace the HID control 
unit.)

LH low beam does not operate, but RH low beam does operate.

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 LH 

headlamp for open circuit.

4. Check LH low beam ground circuit.

5. Replace the xenon bulb with other side bulb or new one. (If 

eclampsia illuminate correctly, replace the bulb.)

6. Replace the HID control unit with other side control unit or new 

one. (If headlamps illuminate correctly, replace the HID control 
unit.)

LT-26

HEADLAMP (FOR USA)

AUTO LIGHT SYSTEM

RH high beam does not operate, but LH high beam does operate.

1. Check bulb.

2. Check harness between headlamp relay-2 terminal 3 and head-

lamp RH terminal 13.

3. Check lighting switch. Refer to 

LT-67, "Switch Circuit Inspec-

tion"

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4. Check harness between headlamp RH terminal 14 and lighting 

switch.

5. Check lighting switch ground circuit.

LH high beam does not operate, but RH high beam does operate.

1. Check bulb.

2. Check harness between headlamp relay-2 terminal 3 and head-

lamp LH terminal 13.

3. Check lighting switch. Refer to 

LT-67, "Switch Circuit Inspec-

tion"

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4. Check harness between headlamp 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 light-

ing 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:

Within 45 seconds after ignition switch turned off.

Front door is opened or more than 45 seconds after ignition 
switch is turn off.

2. Check the following.

Harness between BCM and LH or RH front door switch for open 
or short circuit. 

LH or RH front door switch ground circuit.

LH or RH front door switch.

3. Check the following.

Harness between headlamp battery saver control unit terminals 
5 or 13 and lighting switch terminal 11 for open or short circuit.

Harness between lighting switch terminal 5 and ground.

Lighting switch. Refer to 

LT-67, "Switch Circuit Inspection"

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4. Check headlamp battery saver control unit. Refer to 

LT-17, "Ter-

minals and Reference Value for Battery Saver Control Unit"

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5. Check BCM. Refer to 

LT-18, "Terminals and Reference Value 

for BCM"

 .

Symptom

Repair Procedure

Symptom

Malfunctioning system and reference

Clearance lamps and headlamps will not illuminate when out-
side of the vehicle becomes dark. (Lighting switch 1st position 
and 2nd position operate normally.)

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

Lighting switch (AUTO) system. Refer to 

LT-27, "Lighting Switch 

(AUTO) System Check"

 .

Optical sensor system. Refer to 

LT-28, "Optical Sensor System 

Check"

 .

If above systems are normal, replace the BCM.

 

 

 

 

 

 

 

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