Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti QX56 JA60 2004-2005 Approved 2004_QX56 lt
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K ELECTRICAL
A
SECTION
LIGHTING SYSTEM
LT B
C
D
E
CONTENTS
PRECAUTIONS ......................................................... 4 . LOW BEAM AND HIGH BEAM .......................... 31 . F
Precautions for Supplemental Restraint System Bulb Replacement ................................................. 32 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- HEADLAMP (OUTER SIDE), FOR LOW BEAM... 32
SIONER" ................................................................. 4
. HEADLAMP (INNER SIDE), FOR HIGH BEAM... 32 G
General precautions for service operations ............ 5 . FRONT PARKING LAMP (INNER OR OUTER)... 32
Wiring Diagrams and Trouble Diagnosis ................. 5 . FRONT SIDE MARKER LAMP .......................... 32 .
HEADLAMP (FOR USA) ........................................... 6 . Removal and Installation ....................................... 33 .
H
Component Parts and Harness Connector Location 6 ..... REMOVAL .......................................................... 33.
System Description ................................................. 6 . INSTALLATION .................................................. 33 .
OUTLINE .............................................................. 6
. Disassembly and Assembly ................................... 33 .
XENON HEADLAMP ............................................ 7 . HEADLAMP (FOR CANADA) - DAYTIME LIGHT I
BATTERY SAVER CONTROL ............................. 8 . SYSTEM - ................................................................. 34
.
AUTO LIGHT OPERATION .................................. 8 . Component Parts and Harness Connector Location 34 ...
VEHICLE SECURITY SYSTEM (PANIC ALARM) 8 ..... System Description ................................................ 35 . J
CAN Communication System Description ............... 8 . OUTLINE ............................................................ 35
.
Schematic ............................................................... 9
. DAYTIME LIGHT OPERATION .......................... 35 .
Wiring Diagram -- H/LAMP -- .............................. 10 . COMBINATION SWITCH READING FUNCTION 35 ...
LT
Terminals and Reference Values for BCM ............ 14 . AUTO LIGHT OPERATION ................................ 35 .
Terminals and Reference Values for IPDM E/R .... 15 . CAN Communication System Description ............. 35 .
How to Proceed With Trouble Diagnosis ............... 15 . Schematic .............................................................. 36
.
Preliminary Check ................................................. 16 . Wiring Diagram -- DTRL -- .................................. 37 . L
CHECK POWER SUPPLY AND GROUND CIR- Terminals and Reference Values for BCM ............. 41 .
CUIT ................................................................... 16
. How to Proceed With Trouble Diagnosis ............... 42 .
CONSULT-II Function (BCM) ................................ 18 . Preliminary Check ................................................. 42 . M
CONSULT-II OPERATION ................................. 18 . CHECK BCM CONFIGURATION ....................... 42 .
WORK SUPPORT .............................................. 19 . INSPECTION FOR POWER SUPPLY AND
DATA MONITOR ................................................ 19 . GROUND CIRCUIT ............................................ 42 .
ACTIVE TEST .................................................... 20 . INSPECTION PARKING BRAKE SWITCH CIR-
SELF-DIAGNOSTIC RESULTS ......................... 20 . CUIT ................................................................... 43
.
CONSULT-II Function (IPDM E/R) ........................ 21 . CONSULT-II Functions .......................................... 44 .
CONSULT-II OPERATION ................................. 21 . Daytime Light Control Does Not Operate Properly
DATA MONITOR ................................................ 22 . (Normal Headlamps Operate Properly) ................. 44 .
ACTIVE TEST .................................................... 22 . Aiming Adjustment ................................................. 46 .
Headlamp HI Does Not Illuminate (Both Sides) .... 23 . Bulb Replacement ................................................. 46 .
Headlamp HI Does Not Illuminate (One Side) ...... 25 . Removal and Installation ....................................... 46 .
High Beam Indicator Lamp Does Not Illuminate ... 26 Disassembly and Assembly ................................... 46 .
Headlamp LO Does Not Illuminate (Both Sides) ... 26 AUTO LIGHT SYSTEM ............................................ 47 .
Headlamp LO Does Not Illuminate (One Side) ..... 28 . Component Parts and Harness Connector Location 47 ...
Headlamps Do Not Turn OFF ............................... 29 . System Description ................................................ 48 .
Aiming Adjustment ................................................ 31 . OUTLINE ............................................................ 48
.
Revision: August 2007 LT-1 2004 QX56
COMBINATION SWITCH READING FUNCTION 48 ... TURN SIGNAL OPERATION ..............................80 .
EXTERIOR LAMP BATTERY SAVER CONTROL 48 ... HAZARD LAMP OPERATION ............................81 .
DELAY TIMER FUNCTION ................................ 48 . REMOTE KEYLESS ENTRY SYSTEM OPERA-
CAN Communication System Description ............. 48 . TION ...................................................................82
.
Major Components and Functions ......................... 48 . COMBINATION SWITCH READING FUNCTION ...82
Schematic .............................................................. 49
. CAN Communication System Description .............82 .
Wiring Diagram -- AUTO/L -- ............................... 50 . Wiring Diagram -- TURN -- ..................................83 .
Terminals and Reference Values for BCM ............. 53 . Terminals and Reference Values for BCM .............85 .
Terminals and Reference Values for IPDM E/R ..... 54 . How to Proceed With Trouble Diagnosis ...............86 .
How to Proceed With Trouble Diagnosis ............... 55 . Preliminary Check ..................................................87 .
Preliminary Check ................................................. 55 . CHECK POWER SUPPLY AND GROUND CIR-
SETTING CHANGE FUNCTIONS ...................... 55 . CUIT ....................................................................87
.
CHECK POWER SUPPLY AND GROUND CIR- CONSULT-II Function (BCM) .................................88 .
CUIT ................................................................... 55
. CONSULT-II OPERATION ..................................88 .
CONSULT-II Function (BCM) ................................. 57 . DATA MONITOR .................................................89 .
CONSULT-II OPERATION .................................. 57 . ACTIVE TEST .....................................................89 .
WORK SUPPORT .............................................. 58 . Turn Signal Lamp Does Not Operate .....................90 .
DATA MONITOR ................................................. 58 . Rear Turn Signal Lamp Does Not Operate ............91 .
ACTIVE TEST .................................................... 59 . Hazard Warning Lamp Does Not Operate But Turn
SELF-DIAGNOSTIC RESULTS .......................... 59 . Signal Lamps Operate ...........................................92 .
CONSULT-II Function (IPDM E/R) ......................... 60 . Turn Signal Indicator Lamp Does Not Operate ......93 .
CONSULT-II OPERATION .................................. 60 . Bulb Replacement (Front Turn Signal Lamp) .........94 .
DATA MONITOR ................................................. 61 . Bulb Replacement (Rear Turn Signal Lamp) .........94 .
ACTIVE TEST .................................................... 61 . Removal and Installation of Front Turn Signal Lamp ...94
Trouble Diagnosis Chart by Symptom ................... 62 . Removal and Installation of Rear Turn Signal Lamp...94
Lighting Switch Inspection ..................................... 62 . LIGHTING AND TURN SIGNAL SWITCH ...............95 .
Optical Sensor System Inspection ......................... 63 . Removal and Installation ........................................95 .
Removal and Installation of Optical Sensor ........... 64 . REMOVAL ...........................................................95 .
REMOVAL .......................................................... 64. INSTALLATION ...................................................95 .
INSTALLATION ................................................... 64 . HAZARD SWITCH ....................................................96 .
HEADLAMP AIMING CONTROL ............................. 65 . Removal and Installation ........................................96 .
System Description ................................................ 65 . REMOVAL ...........................................................96 .
Wiring Diagram -- H/AIM -- .................................. 66 . INSTALLATION ...................................................96 .
Removal and Installation ....................................... 68 . COMBINATION SWITCH .........................................97 .
Switch Circuit Inspection ....................................... 68 . Wiring Diagram -- COMBSW -- ...........................97 .
FRONT FOG LAMP ................................................. 69 . Combination Switch Reading Function ..................98 .
Component Parts and Harness Connector Location 69 ... CONSULT-II Function (BCM) .................................98 .
System Description ................................................ 69 . CONSULT-II OPERATION ..................................98 .
OUTLINE ............................................................ 69
. DATA MONITOR .................................................99 .
COMBINATION SWITCH READING FUNCTION 70 ... Combination Switch Inspection ............................ 100 .
EXTERIOR LAMP BATTERY SAVER CONTROL 70 ... Removal and Installation ...................................... 102 .
CAN Communication System Description ............. 70 . Switch Circuit Inspection ...................................... 102 .
Wiring Diagram -- F/FOG -- ................................. 71 . STOP LAMP ........................................................... 103 .
Terminals and Reference Values for BCM ............. 73 . System Description .............................................. 103 .
Terminals and Reference Values for IPDM E/R ..... 74 . Wiring Diagram -- STOP/L -- ............................. 104 .
How to Proceed With Trouble Diagnosis ............... 74 . High-Mounted Stop Lamp .................................... 105 .
Preliminary Check ................................................. 75 . BULB REPLACEMENT ..................................... 105 .
CHECK POWER SUPPLY AND GROUND CIR- REMOVAL AND INSTALLATION ...................... 105 .
CUIT ................................................................... 75
. Stop Lamp ............................................................ 105
.
CONSULT-II Functions .......................................... 76 . BULB REPLACEMENT ..................................... 105 .
Front Fog Lamps Do Not Illuminate (Both Sides) ... 76 REMOVAL AND INSTALLATION ...................... 105 .
Front Fog Lamp Does Not Illuminate (One Side) ... 77 BACK-UP LAMP .................................................... 106 .
Aiming Adjustment ................................................. 78 . Wiring Diagram -- BACK/L -- ............................. 106 .
Bulb Replacement ................................................. 79 . Bulb Replacement ................................................ 107 .
Removal and Installation ....................................... 79 . Removal and Installation ...................................... 107 .
TURN SIGNAL AND HAZARD WARNING LAMPS... 80 PARKING, LICENSE PLATE AND TAIL LAMPS ... 108 .
Component Parts and Harness Connector Location 80 ... Component Parts and Harness Connector Location .108
System Description ................................................ 80 . System Description .............................................. 108 .
OUTLINE ............................................................ 80
. OPERATION BY LIGHTING SWITCH .............. 109 .
Revision: August 2007 LT-2 2004 QX56
COMBINATION SWITCH READING FUNCTION 109 . POWER SUPPLY AND GROUND ................... 130 .
EXTERIOR LAMP BATTERY SAVER CONTROL 109 . SWITCH OPERATION ..................................... 131 . A
CAN Communication System Description ........... 109 . ROOM LAMP TIMER OPERATION ................. 131 .
Schematic ............................................................110 . INTERIOR LAMP BATTERY SAVER CONTROL 132 .
Wiring Diagram -- TAIL/L -- ................................ 111 . Schematic ............................................................ 133
. B
Terminals and Reference Values for BCM ...........114 . Wiring Diagram -- INT/L -- ................................. 135 .
Terminals and Reference Values for IPDM E/R ...115 . Terminals and Reference Values for BCM ........... 142 .
How to Proceed With Trouble Diagnosis ..............115 . How to Proceed With Trouble Diagnosis ............. 142 .
Preliminary Check ................................................116 . Preliminary Check ............................................... 143 . C
CHECK POWER SUPPLY AND GROUND CIR- INSPECTION FOR POWER SUPPLY AND
CUIT ..................................................................116
. GROUND CIRCUIT .......................................... 143 .
CONSULT-II Functions .........................................117 . CONSULT-II Function (BCM) .............................. 144 . D
Parking, License Plate and/or Tail Lamps Do Not CONSULT-II OPERATION ................................ 144 .
Illuminate ..............................................................117. WORK SUPPORT ............................................ 145 .
Parking, License Plate and Tail Lamps Do Not Turn DATA MONITOR .............................................. 145 . E
OFF (After Approx. 10 Minutes) .......................... 120 . ACTIVE TEST .................................................. 146 .
Front Parking Lamp ............................................. 121 . Room/Map Lamp Control Does Not Operate ...... 146 .
BULB REPLACEMENT .................................... 121 . Personal Lamp Control Does Not Operate (Room/
Tail Lamp ............................................................. 121 . Map Lamps Operate) ........................................... 148 . F
BULB REPLACEMENT .................................... 121 . All Step/Foot/Puddle Lamps Do Not Operate ...... 149 .
License Plate Lamp ............................................. 121 . All Interior Room Lamps Do Not Operate ............ 150 .
BULB REPLACEMENT .................................... 121 . Ignition Keyhole Illumination Control Does Not G
REAR COMBINATION LAMP ............................... 122 . Operate ................................................................ 150
.
Bulb Replacement (Turn Signal) ......................... 122 . ILLUMINATION ...................................................... 152 .
Removal and Installation ..................................... 122 . Component Parts and Harness Connector Location 152 . H
......................................................................... 122
. System Description .............................................. 152 .
TRAILER TOW ...................................................... 123 . ILLUMINATION OPERATION BY LIGHTING
Component Parts and Harness Connector Location 123 . SWITCH ........................................................... 153
.
I
System Description ............................................. 123 . EXTERIOR LAMP BATTERY SAVER CONTROL 154 .
TRAILER TAIL LAMP OPERATION ................. 124 . CAN Communication System Description ........... 154 .
TRAILER BRAKE, TURN SIGNAL AND HAZARD Schematic ............................................................ 155
.
LAMP OPERATION ......................................... 124 . Wiring Diagram -- ILL -- ..................................... 158 . J
TRAILER BRAKE OPERATION ....................... 124 . Removal and Installation ..................................... 169 .
TRAILER POWER SUPPLY OPERATION ....... 124 . ILLUMINATION CONTROL SWITCH ............... 169 .
Schematic ........................................................... 125 . BULB SPECIFICATIONS ....................................... 170 . LT
Wiring Diagram -- T/TOW -- .............................. 126 . Headlamp ............................................................ 170
.
INTERIOR ROOM LAMP ....................................... 129 . Exterior Lamp ...................................................... 170
.
Component Parts and Harness Connector Location 129 . Interior Lamp/Illumination .................................... 170 .
L
System Description ............................................. 130 .
M
Revision: August 2007 LT-3 2004 QX56
PRECAUTIONS
PRECAUTIONS PFP:00011
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EKS0079M
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
G To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.
G Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
G Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Revision: August 2007 LT-4 2004 QX56
PRECAUTIONS
General precautions for service operations EKS007RV
A
G Never work with wet hands.
G Xenon headlamp includes high voltage generating part. Be sure
to disconnect battery negative cable (negative terminal) or
power fuse before removing, installing, or touching the xenon B
headlamp (including lamp bulb).
G Turn the lighting switch OFF before disconnecting and connect-
ing the connector. C
G When turning the xenon headlamp on and while it is illuminated,
never touch the harness, bulb, and socket of the headlamp.
G When checking the headlamp on/off operation, check it on vehi- D
WKIA0460E
cle and with the power connected to the vehicle-side connector.
G Do not touch the headlamp bulb glass surface with bare hands or allow oil or grease to get on it. Do not
touch the headlamp bulb just after the headlamp is turned off, because it is very hot. E
G Install the xenon headlamp bulb socket correctly. If it is installed
improperly, high-voltage leak or corona discharge may occur
that can melt the bulb, connector, and housing. Do not illuminate F
the xenon headlamp bulb out of the headlamp housing. Doing
so can cause fire and harm your eyes.
G When the bulb has burned out, wrap it in a thick vinyl bag and G
discard. Do not break the bulb.
G Leaving the bulb removed from the headlamp housing for a long
period of time can deteriorate the performance of the lens and
H
reflector (dirt, clouding). Always prepare a new bulb and have it
on hand when replacing the bulb. EL-3422D
G Do not use organic solvent (paint thinner or gasoline) to clean
lamps and to remove old sealant. I
Wiring Diagrams and Trouble Diagnosis EKS0079O
When you read wiring diagrams, refer to the following: J
G Refer to GI-15, "How to Read Wiring Diagrams" in GI section.
G Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT" for power distribution in PG section.
When you perform trouble diagnosis, refer to the following: LT
G Refer to GI-11, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES" in GI section.
G Refer to GI-27, "How to Perform Efficient Diagnosis for an Electrical Incident" in GI section.
L
M
Revision: August 2007 LT-5 2004 QX56
HEADLAMP (FOR USA)
HEADLAMP (FOR USA) PFP:26010
Component Parts and Harness Connector Location EKS0079P
WKIA3392E
System Description EKS0079Q
Control of the headlamp system operation is dependent upon the position of the combination switch (lighting
switch). When the lighting switch is placed in the 2ND position, the BCM (body control module) receives input
requesting the headlamps (and tail lamps) illuminate. This input is communicated to the IPDM E/R (intelligent
power distribution module engine room) across the CAN communication lines. The CPU (central processing
unit) of the IPDM E/R controls the headlamp high and headlamp low relay coils. When energized, these relays
direct power to the respective headlamps, which then illuminate.
OUTLINE
Power is supplied at all times
G to headlamp high relay, located in the IPDM E/R, and
G to headlamp low relay, located in the IPDM E/R, and
G to ignition relay, located in the IPDM E/R, and
G through 20A fuse (No. 53, located in the IPDM E/R)
G to CPU of the IPDM E/R, and
G through 10A fuse [No. 19, located in the fuse block (J/B)]
Revision: August 2007 LT-6 2004 QX56
HEADLAMP (FOR USA)
G to combination meter terminal 8, and
G through 50A fusible link (letter f , located in the fuse and fusible link box) A
G to BCM terminal 70.
With the ignition switch in the ON or START position, power is supplied
B
G to ignition relay, located in the IPDM E/R, and
G through 10A fuse [No. 14, located in the fuse block (J/B)]
G to combination meter terminal 24, and C
G through 10A fuse (No. 59, located in the fuse and relay box)
G to BCM terminal 38.
Ground is supplied D
G to BCM terminal 67 and
G to combination meter terminal 17
G through grounds M57, M61 and M79, and E
G to IPDM E/R terminals 38 and 59
G through grounds E9, E15 and E24.
F
Low Beam Operation
With the lighting switch in 2ND position, the BCM receives input requesting the headlamps to illuminate. This
input is communicated to the IPDM E/R across the CAN communication lines. The CPU of the IPDM E/R con- G
trols the headlamp low relay coil. When energized, this relay directs power
G through 15A fuse (No. 41, located in the IPDM E/R)
G through IPDM E/R terminal 54 H
G to front combination lamp RH terminal 5, and
G through 15A fuse (No. 40, located in the IPDM E/R)
G through IPDM E/R terminal 52 I
G to front combination lamp LH terminal 5.
Ground is supplied
J
G to front combination lamp LH and RH terminal 1
G through grounds E9, E15 and E24.
With power and ground supplied, low beam headlamps illuminate.
LT
High Beam Operation/Flash-to-Pass Operation
With the lighting switch in 2ND position and placed in HIGH or PASS position, the BCM receives input request-
ing the headlamp high beams to illuminate. This input is communicated to the IPDM E/R across the CAN com- L
munication lines. The CPU of the combination meter controls the ON/OFF status of the HIGH BEAM indicator.
The CPU of the IPDM E/R controls the headlamp high relay coil. When energized, this relay directs power
G through 10A fuse (No. 34, located in the IPDM E/R) M
G through IPDM E/R terminal 56
G to front combination lamp RH terminal 6, and
G through 10A fuse (No. 35, located in the IPDM E/R)
G through IPDM E/R terminal 55
G to front combination lamp LH terminal 6.
Ground is supplied
G to front combination lamp LH and RH terminal 2
G through grounds E9, E15 and E24.
With power and ground supplied, the high beam headlamps illuminate.
XENON HEADLAMP
Xenon type headlamp is adopted to the low beam headlamps. Xenon bulbs do not use a filament. Instead,
they produce light when a high voltage current is passed between two tungsten electrodes through a mixture
of xenon (an inert gas) and certain other metal halides. In addition to added lighting power, electronic control
of the power supply gives the headlamps stable quality and tone color.
Following are some of the many advantages of the xenon type headlamp.
Revision: August 2007 LT-7 2004 QX56
HEADLAMP (FOR USA)
G The light produced by the headlamps is a white color comparable to sunlight that is easy on the eyes.
G Light output is nearly double that of halogen headlamps, affording increased area of illumination.
G The light features a high relative spectral distribution at wavelengths to which the human eye is most sen-
sitive. This means that even in the rain, more light is reflected back from the road surface toward the vehi-
cle, for added visibility.
G Power consumption is approximately 25 percent less than halogen headlamps, reducing battery load.
BATTERY SAVER CONTROL
When the combination switch (lighting switch) is in the 2ND position (ON), and the ignition switch is turned
from ON or ACC to OFF, the battery saver control feature is activated.
Under this condition, the headlamps remain illuminated for 5 minutes, unless the combination switch (lighting
switch) position is changed. If the combination switch (lighting switch) position is changed, then the headlamps
are turned off.
AUTO LIGHT OPERATION
Refer to LT-48, "System Description" for auto light operation.
VEHICLE SECURITY SYSTEM (PANIC ALARM)
The vehicle security system (panic alarm) will flash the high beams if the system is triggered. Refer to BL-48,
"Panic Alarm Operation" .
CAN Communication System Description EKS0079R
Refer to LAN-5, "CAN COMMUNICATION" .
Revision: August 2007 LT-8 2004 QX56
HEADLAMP (FOR USA)
Schematic EKS0079S
A
B
C
D
E
F
G
H
I
J
LT
L
M
WKWA3106E
Revision: August 2007 LT-9 2004 QX56
HEADLAMP (FOR USA)
Wiring Diagram -- H/LAMP -- EKS0079T
WKWA3107E
Revision: August 2007 LT-10 2004 QX56
HEADLAMP (FOR USA)
A
B
C
D
E
F
G
H
I
J
LT
L
M
WKWA1193E
Revision: August 2007 LT-11 2004 QX56
HEADLAMP (FOR USA)
WKWA1194E
Revision: August 2007 LT-12 2004 QX56
HEADLAMP (FOR USA)
A
B
C
D
E
F
G
H
I
J
LT
L
M
WKWA3108E
Revision: August 2007 LT-13 2004 QX56
HEADLAMP (FOR USA)
Terminals and Reference Values for BCM EKS0079U
Measuring condition
Terminal Wire Reference value
Signal name Ignition
No. color Operation or condition (Approx.)
switch
Lighting, turn, wiper OFF
2 SB Combination switch input 5 ON
Wiper dial position 4
SKIA5291E
Lighting, turn, wiper OFF
3 G/Y Combination switch input 4 ON
Wiper dial position 4
SKIA5292E
Lighting, turn, wiper OFF
4 Y Combination switch input 3 ON
Wiper dial position 4
SKIA5291E
5 G/B Combination switch input 2
Lighting, turn, wiper OFF
ON
6 V Combination switch input 1 Wiper dial position 4
SKIA5292E
Lighting, turn, wiper OFF
32 R/G Combination switch output 5 ON
Wiper dial position 4
SKIA5291E
Lighting, turn, wiper OFF
33 R/Y Combination switch output 4 ON
Wiper dial position 4
SKIA5292E
Lighting, turn, wiper OFF
34 L Combination switch output 3 ON
Wiper dial position 4
SKIA5291E
Revision: August 2007 LT-14 2004 QX56
HEADLAMP (FOR USA)
Measuring condition
Terminal Wire Reference value A
Signal name Ignition
No. color Operation or condition (Approx.)
switch
35 O/B Combination switch output 2
B
Lighting, turn, wiper OFF
ON
36 R/W Combination switch output 1 Wiper dial position 4
C
SKIA5292E
38 W/L Ignition switch (ON) ON -- Battery voltage D
39 W CAN-H -- -- --
40 R CAN-L -- -- --
E
67 B Ground ON -- 0V
70 W/B Battery power supply (fusible OFF Battery voltage
--
link)
F
Terminals and Reference Values for IPDM E/R EKS0079V
Measuring condition
Terminal Wire Reference value G
Signal name Ignition
No. color Operation or condition (Approx.)
switch
38 B Ground ON -- 0V H
39 W CAN-H -- -- --
40 R CAN-L -- -- --
Lighting switch OFF 0V I
52 L Headlamp low (LH) ON
2ND position ON Battery voltage
Lighting switch OFF 0V
54 R/Y Headlamp low (RH) ON J
2ND position ON Battery voltage
Lighting switch OFF 0V
55 G Headlamp high (LH) ON HIGH or PASS
ON Battery voltage LT
position
Lighting switch OFF 0V
56 L/W Headlamp high (RH) ON HIGH or PASS
position ON Battery voltage L
59 B Ground ON -- 0V
How to Proceed With Trouble Diagnosis EKS0079W M
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT-6, "System Description" .
3. Perform the Preliminary Check. Refer to LT-16, "Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does the headlamp operate normally? If YES: GO TO 6. If NO: GO TO 4.
6. Inspection End.
Revision: August 2007 LT-15 2004 QX56
HEADLAMP (FOR USA)
Preliminary Check EKS0079X
CHECK POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSES OR FUSIBLE LINK
Check for blown fuses or fusible link.
Unit Power source Fuse No.
Battery f
BCM
Ignition switch ON or START position 59
34
35
IPDM E/R Battery 40
41
53
Refer to LT-10, "Wiring Diagram -- H/LAMP --" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of blown fuse before installing new fuse. Refer to PG-
4, "POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect BCM connectors.
2. Check voltage between BCM harness connector and ground.
BCM Ignition switch position
(+)
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